New ignition trouble code

[stev0n]

New trouble code

UPDATE & I need help and ford knowledge.

Truck has been running decent since replacement of o2 sensors. Gas mileage has improved about 75%. But I still have an extremely erratic idle & get code 16 on KOEO & KOER.

1) I pulled the vacuum line from the intake tube off at the oil cap and plug it with my thumb as i let the valve cover side stay open. RPMs jumped to a 1000 at start and stayed for a few seconds til they dropped dramatically.

2) I then noticed something (of which i have no clue what it is). it is directly underneath a sensor plugging into the intake manifold. the piece has a rubber connection on the bottom of it (closest to exhaust manifold) that connects to it at a 90 degree angle. The bracket it's on is on the outside of the egr.

there are two lines (vacuum lines i think) plugging into this piece, the bottom one is fine. the top part feels like it has been cut off.

Could this have anything to do with the code or idle?
And what is this piece i am talking about?

3) got a new actron ford code book for my reader and it has a more detailed definition of CODE 16. Now I know mine is supposed to have 3 digits but this reader shouts out two. and so far the reader has been correct.

CODE 16 (KOEO & KOER) -

• RPM Too Low during engine self-test (or)
• Idle Speed Control (ISC) RPM out of self-test specification (or)
• Electronic Distributorless Ignition System (EDIS) fault - Ignition Diagnostic Monitor (IDM) signal not received (or)
• O2 sensor - voltage indicates "rich" during engine run self-test

so any help as quickly as possible before it gets too cold outside would be greatly appreciated!!!!!

Thanks Guys!!!

 

[MrShorty]

Are you certain of those codes? If this is on your '94, I'd expect to see 3 digit codes ('91 was the only year 4.0 that output 2 digit codes).

 

[stev0n]

yes i am getting 2 digit codes on my 94. i got 17, 41, and 42 a couple weeks back. all were o2 sensor codes. replaced the o2 sensors and codes went away. so the codes are correct.

I dunno if maybe the ecu has been replaced? not sure. (I've only owned the truck for 11 months of its 13 year life). but i don't know if i need to replace the coil packs? or what i need to do. so any help would be apreciated SO much.

 

[MrShorty]

It might be useful to know if we are dealing with a '91 computer or a '94 computer, because they are quite different.

IDM isn't going to be coil packs. '91 or '94 PCM don't monitor the output of the coil packs. IDM code will be in the interaction between the PCM and the ICM.

 

[stev0n]

you lost me there... i take it the pcm is the computer? so do i need to replace the ignition control module? haha sorry if i sound like a dumbass, i'm just confused. if i need to replace the icm how do i know where it is and what it looks like, so i can replace it?

 

[stev0n]

and how can i tell if it's a 91 computer?

 

[cjones101812]

what's the PCM part #?? if it starts with F3 or F4 then it's most likely the original.

code 16 - IDM circuit failure - Processor did not receive the IDM signal from the EDIS module in KOEO test mode.

disconnect PCM connector and EDIS connector. measure resistance between Pin 4 on PCM connector and Pin 2 on EDIS connector. should be LESS than 5 ohms.

if so, check resistance between Pin 4 and Pins 40, 46, and 60 on PCM connector. each resistance should be OVER 10,000 ohms.

 

[stev0n]

WOH! you just completely lost me. i have no idea what that means. can you simplify it for idiots like me? haha sorry.

 

[cjones101812]

PCM - Powertrain Control Module - the computer

EDIS - Electronic Distributorless Ignition System - basically an Ignition Control Module for Distributorless Ignition. 12-pin connector.

IDM - Ignition Diagnostic Monitor - is in the PCM

Pin# 4 on the PCM connector has a Tan/Yellow (T/Y) wire. Pin# 2 on the EDIS connector should also be a T/Y wire. by doing an Ohms check between the two connectors you are making sure that wire is in good condition.

Pin# 4 on the PCM connector has a Tan/Yellow (T/Y) wire. Pins 40 and 60 are BK/LG (Black/Light Green). Pin 46 is BK/W (Black/White). by doing an Ohms check between Pin 4 and Pin 40, Pin 4 and Pin 60, and Pin 4 and Pin 46 you check to make sure there is not a short between those wires.

hope this helped clarify some. let me know if you need more clarification.

 

[btexpress]

Those code readers are not that reliable, could be why you are getting two digit codes instead of three digit. Might even be a false code.

If there is actually an IDM problem, could be a connector problem or the ignition module.

The previous instructions here were pretty clear if you know how to use a DVOM and find the circuits in question. If you don't understand it as described, maybe you shouldn't persue this yourself.

 

[stev0n]

UPDATE & I need help and ford knowledge.

Truck has been running decent since replacement of o2 sensors. Gas mileage has improved about 75%. But I still have an extremely erratic idle & get code 16 on KOEO & KOER.

1) I pulled the vacuum line from the intake tube off at the oil cap and plug it with my thumb as i let the valve cover side stay open. RPMs jumped to a 1000 at start and stayed for a few seconds til they dropped dramatically.

2) I then noticed something (of which i have no clue what it is). it is directly underneath a sensor plugging into the intake manifold. the piece has a rubber connection on the bottom of it (closest to exhaust manifold) that connects to it at a 90 degree angle. The bracket it's on is on the outside of the egr.

there are two lines (vacuum lines i think) plugging into this piece, the bottom one is fine. the top part feels like it has been cut off.

Could this have anything to do with the code or idle?
And what is this piece i am talking about?

3) got a new actron ford code book for my reader and it has a more detailed definition of CODE 16. Now I know mine is supposed to have 3 digits but this reader shouts out two. and so far the reader has been correct.

CODE 16 (KOEO & KOER) -

• RPM Too Low during engine self-test (or)
• Idle Speed Control (ISC) RPM out of self-test specification (or)
• Electronic Distributorless Ignition System (EDIS) fault - Ignition Diagnostic Monitor (IDM) signal not received (or)
• O2 sensor - voltage indicates "rich" during engine run self-test

so any help as quickly as possible before it gets too cold outside would be greatly appreciated!!!!!

Thanks Guys!!!

 

[stev0n]

bump...help...anyone?

 

[MrShorty]

This is when you need a year/engine specific code list (but such a list for a '94 would only have 3 digit codes, which brings us back to the original "what computer is installed" question). According to what I can deduce:

CODE 16 (KOEO & KOER) -

* RPM Too Low during engine self-test (or) applies to 1.9, 2.3, or 2.5 L engine
* Idle Speed Control (ISC) RPM out of self-test specification (or) applies to 1.9, 2.3, or 2.5 L engine
* Electronic Distributorless Ignition System (EDIS) fault - Ignition Diagnostic Monitor (IDM) signal not received (or) unspecified, but supposedly only a KOEO code, not a KOER code
* O2 sensor - voltage indicates "rich" during engine run self-test unspecified, but O2 sensor can't be tested KOEO, so this can't be a KOEO code.

cjones posted how to test the wiring between the EDIS module and the PCM. Were you able to make sense of his instructions, yet? If not, what are you missing? For now, we are assuming you know how to read a wiring diagram, how to use a DVOM, and the baiscs of DC electricity.

Have you tried pulling codes without the code reader, using jumper wire and the check engine light, just to make sure there isn't something wrong with the code reader? I hate troubleshooting a code that I'm not sure is real.

 

[stev0n]

i dont understand how to use a jumper wire or paperclip to pull the codes. the plug i plug the reader into has SO many different little terminals, i'm not sure which ones i'm supposed to put the paperclip in or whatnot.

 

[MrShorty]

Have you reviewed the stickies at the top of this forum? BrooklynBay's list of codes also has a diagram showing which terminals to jumper. Between his thread and my thread and your Actron user manual, you should have little trouble with the test procedure.

 

[stev0n]

I apologize to everyone who's tried to help me over the last couple of months.

I JUST WON THE IDIOT AWARD AND EVEN GOT BONUS POINTS

I know why i've been getting 2 digit codes - I've been scanning my "abs test" i just found the eec test (with no cover on it saying eec test) under my fuse box on the pass. side and it gave me 3 digit codes.

all the pictures and write-ups i found said the connector was on the drivers side - this is what messed me up.

 

[stev0n]

...i did KOEO test and here are the 4 codes i got...

565,(repeat 565), a few single beeps, then 112, 157, 336, (repeat 112, 157, 336)

Here are the definitions my actron manual gives compared to brooklyn bay's.

565 - Actron/Brooklyn Bay - Canister purge (canp) solenoid - circuit failure

112 - Actron - air charge temp. (act) sensor - signal volts too low
- Brooklyn Bay - Intake Air Temp (IAT) sensor is/was low or grounded

157 - Actron/Brooklyn Bay - MAF sensor - signal volts too low

336 - Actron - pressure feedback egr (pfe) sensor or egr pressure transducer (ept) - signal volt higher than expected (exhaust pressure high)
- Brooklyn Bay - Pressure Feedback EGR Circuit Voltage Higher Than Expected

So what am I looking at?
My first thought of 336 is the cat. converter is stopped up or something. But I'm lost on the others.

 

[MrShorty]

And, if memory serves, 16 is system pass for the 4WABS system.

Sorry for your misunderstanding. I remember running into the same problem on my sister-in-law's Sable -- the EEC-IV test connector wasn't where the manual said it should be, and the ABS connector was where the manual said the EEC-IV test connector should be.

For the codes:

KOEO 565: Cannister Purge Solenoid (CANP) circuit fault. My experience with these types of codes is that it is either pointing to a full open in the CANP solenoid circuit or a short to ground. This should be easy to track down with a voltmeter and a wiring diagram.

SOP with EEC-IV diagnostics is to resolve KOEO codes first, then move on to KOER codes. Since it doesn't look like you've tried the KOER test, that would be the next step, after resolving the KOEO 565.

Before spending a lot of time on that list of 3 CM codes, I would probably clear CM, test drive, and see which of those codes come back, just in case one or more of those codes is an old code that no longer applies.

 

[stev0n]

okay thats great help! not now where exactly is the canister purge solenoid, so i can try to track that problem down? and how do i clear the cm?

 

[stev0n]

oh and where can i get a wiring diagram for it?