4.0 SOHC was jerking at 55-60 mph , now stalling every 2-3 miles.

[410Fortune]

Start here
As you can see

When the wire leaves the pcm it is PIN number 2 at connector c175 (the pcm)

Then it travels to connector c146 as pin 11
And finally at the instrument cluster in connector c220b it is pin 9

The pcm sends the wire a negative or ground to illuminate the light.
Physically inspect the wire and pins in each connector

Check continuity between the pin 9 at c220b and pin 2 at the pcm

At no time should you have positive voltage from this wire

That takes care of the signal side of the cel

Now for the test.
Tap into pin 9 at c220b and connect it to a good ground with the key in the run position. Does the check engine light Bulb Come on?
If yes the your issue is on the pcm to light signal side of things
If no then it’s likely on the fuse/ power side of things or in the actual back of the cluster (moisture can real havoc ina cluster)

Now you can see that fuse 11 (7.5) in the internal fuse box powers several things in the instrument cluster


Fuel gauge, abs light, etc they are shown on the diagram
This fuse is hot in start or run
So you should have battery voltage at pin 8 at the c220b connector when the key is turned to “run”

If all of this checks out and the + and - are making it to the cluster then you need to closely inspect the back of the cluster and the printed circuit boards see if you can find a connection issue from c220b to the bulb and socket

 

[Maxmax19773]

Start here
As you can see

View attachment 457445

When the wire leaves the pcm it is PIN number 2 at connector c175 (the pcm)

Then it travels to connector c146 as pin 11
And finally at the instrument cluster in connector c220b it is pin 9

The pcm sends the wire a negative or ground to illuminate the light.
Physically inspect the wire and pins in each connector

Check continuity between the pin 9 at c220b and pin 2 at the pcm

At no time should you have positive voltage from this wire

That takes care of the signal side of the cel

Now for the test.
Tap into pin 9 at c220b and connect it to a good ground with the key in the run position. Does the check engine light Bulb Come on?
If yes the your issue is on the pcm to light signal side of things
If no then it’s likely on the fuse/ power side of things or in the actual back of the cluster (moisture can real havoc ina cluster)

Now you can see that fuse 11 (7.5) in the internal fuse box powers several things in the instrument cluster


Fuel gauge, abs light, etc they are shown on the diagram
This fuse is hot in start or run
So you should have battery voltage at pin 8 at the c220b connector when the key is turned to “run”

If all of this checks out and the + and - are making it to the cluster then you need to closely inspect the back of the cluster and the printed circuit boards see if you can find a connection issue from c220b to the bulb and socket

 

[Maxmax19773]

View attachment 457518

View attachment 457519

View attachment 457520

Hi . I’m struggle to find 2 and 11 , I see the wires in insulation attached to firewall or inside the dashboard but I can’t find connectors. I removed passenger air bag and I see all wires going down somewhere. Am I moving in the right direction? I tapped into pin 9 at c220b and ground with key on - no light. Thank for your assistance. Max

 

[410Fortune]

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

 

[Maxmax19773]

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

Hi . Thanks for your encouragement) I am glad to have you on board. I did check c220b and with key on it got 11.83 volts. I did continuity test on

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

 

[Maxmax19773]

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

Hi . Thanks for your encouragement) I am glad to have you on board. I did check c220b and with key on it got 11.83 volts. I did continuity test on

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

Hi . Thanks for your encouragement) I am glad to have you on board. I did check c220b and with key on it got 11.83 volts. I did continuity test on

I did continuity test on that 110 pin connector and pin 9 at c220b . I was no continuity. What I did: I found the wire pink and green one , stick middle as deep as possible and performed the test ( my concern that I might not hit the wire. I think I try to find on that 110 conductor pin 8 I already know works and try continuity test to see if needle is touching the wire. ) And I don’t think I understand how to perform that “ grounding that good wire with a known good bulb 2.11 or 2.2 and light should come On”. Thanks in advance) Max

 

[Maxmax19773]

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

Hi . Thanks for your encouragement) I am glad to have you on board. I did check c220b and with key on it got 11.83 volts. I did continuity test on

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

Hi . Thanks for your encouragement) I am glad to have you on board. I did check c220b and with key on it got 11.83 volts. I did continuity test on

I did continuity test on that 110 pin connector and pin 9 at c220b . I was no continuity. What I did: I found the wire pink and green one , stick middle as deep as possible and performed the test ( my concern that I might not hit the wire. I think I try to find on that 110 conductor pin 8 I already know works and try continuity test to see if needle is touching the wire. )

Hi . Thanks for your encouragement) I am glad to have you on board. I did check c220b and with key on it got 11.83 volts. I did continuity test on

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

Pin 8 on c220 b got 11.83v with key On

 

[Maxmax19773]

Hi . Thanks for your encouragement) I am glad to have you on board. I did check c220b and with key on it got 11.83 volts. I did continuity test on


I did continuity test on that 110 pin connector and pin 9 at c220b . I was no continuity. What I did: I found the wire pink and green one , stick middle as deep as possible and performed the test ( my concern that I might not hit the wire. I think I try to find on that 110 conductor pin 8 I already know works and try continuity test to see if needle is touching the wire. )


Pin 8 on c220 b got 11.83v with key O

Hi . Thanks for your encouragement) I am glad to have you on board. I did check c220b and with key on it got 11.83 volts. I did continuity test on


I did continuity test on that 110 pin connector and pin 9 at c220b . I was no continuity. What I did: I found the wire pink and green one , stick middle as deep as possible and performed the test ( my concern that I might not hit the wire. I think I try to find on that 110 conductor pin 8 I already know works and try continuity test to see if needle is touching the wire. ) And I don’t think I understand how to perform that “ grounding that good wire with a known good bulb 2.11 or 2.2 and light should come On”. Thanks in advance) Max

View attachment 457613

View attachment 457614

i made mistake couple of times in massages. Pin 8 not pin 9 got 11.83 voltage . My apologies. Tired))

 

[Maxmax19773]

I can’t open this thread and can’t see replies )

 

[Maxmax19773]

I can’t open this thread and can’t see replies )

View attachment 457618

Hi . Is this thread still active? I run through this massage.

 

[C420sailor]

I can see them

 

[Maxmax19773]

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

Hi . I have some updates. I had to stop chasing the problem with check engine light

Max
No problem you are doing great!

Connector c175 is the big 110 pin connector at the pcm, in your engine bay under the windshield wipers


I will get you a picture picture of c146 but badically this will be the connector that brings wires in from the engine e bay to under the dash. It is located underneath and behind your brake booster

You can basically do a continuity test from the pcm all the way to the instrument cluster just to make sure there are no breaks in this wire

But since you grounded pin 9 with the key on and no light… I would look elsewhere
Like on the + side of things or in the cluster itself

Grounding that wire with a known good
Bulb in the cluster and a good fuse 2.11 (or 2.2 depending on your
Build date) , should have the light coming on …

Does pin 8 at connector c220b have battery power with the key on??


Something fishy! I wish I was there to help more

Hi . I have some good news. I had to stop chasing protein with check engine light not working because I got to drive it for now ( I will be back on it in a while) , so I installed new cam sensor and I drove 45 miles today and No STalling !!!!! But it runs like crap, badly underpowered, jerk at 30-35 . I guess I hear spark nock . How can I start working on diagnosing this issue? I got to drive it now daily and I will be able to work on it after work. Max

 

[wollimann]

Fireorder is ok and spark plugs seated tight?

 

[Maxmax19773]

Hi . Great idea. Thank you. I will check it out and write back.

 

[Maxmax19773]

Fireorder is ok and spark plugs seated tight?

Fire order is okay, waiting for spark pluplug booth removal tool to be delivered and will check the plugs if they loose.

 

[Maxmax19773]

Ok guys. After 200 miles it stalls again. 200 miles no stalling. Now it’s stalling at low speed. Stalling 2-3 times within 2-3 minutes and run for a few hours and then back to stalling 2-3 times. When I am on the highway and it’s jerking it seems like Over drive mode makes it run smoother but on lover speed like 25-30 it jerks with OD and seems like smoother with OD off . I will try to get under the car when I am off work and inspect all wiring attached to tranny ( maybe something disconnected or broken) and cause jetlrking . Got to fix this sucker) so any idea on what may cause jerking/stalling/and running like a crap ( I got no power and spark knock ) greatly appreciated. It seems like wiggling relay and fuses improved situation and than new cam sensor eliminated stalling for 200 miles so I might be somewhat moving in the right direction. Want to check connection between pcm and cam sensor so if anyone got diagram of 100 pin connector please drop it here. Thank you. Max

 

[410Fortune]

Max check and clean all
Your grounds including the battery terminals and wires going to and from
Sounds like the ignition or pcm is
Losing ground

Inspect all the wiring at the trans
Make sure all relays and fuses plug in snug and tig, inspect the blades and terminals lookin for any corrosion or buildup that could cause connectivity issues

 

[Maxmax19773]

Max check and clean all
Your grounds including the battery terminals and wires going to and from
Sounds like the ignition or pcm is
Losing ground

Inspect all the wiring at the trans
Make sure all relays and fuses plug in snug and tig, inspect the blades and terminals lookin for any corrosion or buildup that could cause connectivity issues

Max check and clean all
Your grounds including the battery terminals and wires going to and from
Sounds like the ignition or pcm is
Losing ground

Inspect all the wiring at the trans
Make sure all relays and fuses plug in snug and tig, inspect the blades and terminals lookin for any corrosion or buildup that could cause connectivity issues

 

[Maxmax19773]

Hi . Alll fuses and relays are checked. Negative and positive cables clean and tight. All wiring on tranny connected with no visible damage to them . I want to check power and ground on pcm . I am not sure how to do that. I have to find pin responsible for power and pin responsible for ground and run the test? Right? I can not find anywhere diagram of that 100 pin connector . Or what colors are this wires to find them visually? Thank you for your help. I’m working on it when I have time. If I figure out how to check power and ground I will do it next. Open up for other inputs. Thanks. Max

 

[410Fortune]

When it stalls do you have a check engine light on the dash?
If so then that means the pcm is still getting battery power and it is still sending power out to sensors. This is why the cel is so important

So if your cel does not work we need to check for power and ground, when it stalls
The eec fuse, relay and diode are suspect so we need to rule a problem with them
Out. (Checking for battery power at the red wire at your coil pack will verify the same thing)

I will Post up the 02 pcm wiring diagram