Cam Position Sensor Picture 96 4L

[DBourbonnais]

Hi,

I am having problems with the Cam position sensor on my 1996 4.0L. Intermittent squeaks, etc...

I've looked and looked and can't see the darn thing. Does anyone have a picture?

Thanks,

Denis

 

[tmh6202]

The camshaft position sensor (CMP sensor) on 3.0L and 4.0L engines is located behind the intake manifold on the top surface of the cylinder block.

On 5.0L engines, it is located in front of the intake manifold on the top surface of the cylinder block.

I have a diagram of what it looks like, if you want it PM me and I will include it in a reply. I am unable to post it here.

 

[Albino 94LTD]

I recommend reading this thread: http://www.explorerforum.com/forums/showthread.php?t=139434

 

[DBourbonnais]

Picture CMP for 4.0L

Thanks guys,

I've done the searches both here in this forum and at any other place I could think of. I've got pictures of the CMPs, of 5.0L CMP locations, instructions on how to fix, warnings on how attempts to fix can be screwed up, etc.

These are of no help to me if I can't figure out where the CMP is located on my 4.0L and how to get at it.

Please send picture(s).

Thanks,
Denis

 

[pj8847]

First step, grab a chilton's or haynes repair manual for your truck, both have a step by step guide to doing the job properly. although if it's just the sensor itself your replacing and not the drive unit as well, its as simple as removing 2 screws and unplugging....this of course after you remove the upper intake.

and the link referenced above did indeed say where your sensor is

http://www.explorerforum.com/forums/showpost.php?p=1261935&postcount=40

 

[tmh6202]

First step, grab a chilton's or haynes repair manual for your truck, both have a step by step guide to doing the job properly. although if it's just the sensor itself your replacing and not the drive unit as well, its as simple as removing 2 screws and unplugging....this of course after you remove the upper intake.

and the link referenced above did indeed say where your sensor is

http://www.explorerforum.com/forums/showpost.php?p=1261935&postcount=40

Removing the upper intake is not as hard as one thinks. I just did it on my 98 4.0 SOHC engine. I had it and the lower off, new seals/gaskets installed and back on in less than three hours this past Saturday morning, right in the drive way. I used a simple socket set and a couple of torx bits (for the upper intake screws/bolts).

 

[pj8847]

I agree, the upper intake is not a problem, but for someone less experienced, it could pose a slight difficulty, more so if they have never done it before.

Now re-aligning the cam sens. drive unit can be a PITA, That's where you need to know what your doing, if its off on it's alignment even by a little, it can cause the truck to run horrible, or not at all.

 

[410Fortune]

You say your cam pos sensor is squeeking?
That doesnt make any sense
Also the OHV 4.0L has a CRANKSHAFT position sensor, not a camshaft position sensor?

Am I missing something?
the SOHC, has a cam pos sensor, but it didnt come out till 97.

I dont see how either sensor will "squeek" they only sit and watch the toner ring spin by....

 

[dreamr]

You say your cam pos sensor is squeeking?
That doesnt make any sense
Also the OHV 4.0L has a CRANKSHAFT position sensor, not a camshaft position sensor?

Am I missing something?
the SOHC, has a cam pos sensor, but it didnt come out till 97.

I dont see how either sensor will "squeek" they only sit and watch the toner ring spin by....

Actually us OHV guys do have a cam position sensor. It is a halleffect sensor attached to the drive body located where your distributor should be. Take a look at the thread linked above. It is discussed quite a bit and there are pictures in there somewhere. The cam sensor (hall effect) isn't where the squeek comes from. It's the drive body it is attached to.

 

[410Fortune]

aha!
on the earlier OHV's I always saw just a distributor block off plate for the top of the oil pump drive. You guys sure the pre OBD-II trucks have a sensor in there? mine has no wires, just a block off plate
I have a 94 OHV sitting on a pallet in the barn, no wires going in there.

 

[dreamr]

aha!
on the earlier OHV's I always saw just a distributor block off plate for the top of the oil pump drive. You guys sure the pre OBD-II trucks have a sensor in there? mine has no wires, just a block off plate
I have a 94 OHV sitting on a pallet in the barn, no wires going in there.

I am not positive on the pre 94 engines, but i would assume so as there needs to be some sensor to monitor the cam position on a distributorless ignition system. However I do not know as I have never looked at a early OHV.

 

[tmh6202]

I am not positive on the pre 94 engines, but i would assume so as there needs to be some sensor to monitor the cam position on a distributorless ignition system. However I do not know as I have never looked at a early OHV.

The thread is in regard to a 4.0 from 96. It does have the CMP. It is attached to the top of what one could say, looks like a distributor, in a pretty general sort of way. That drive is on the rear side of the lower intake manifold, for the OHV 4.0, 3.0 and 5.0, they are all somewhat similar. The 4.0 SOHC is a somewhat different story, for a different thread.

pj-The last engine I worked on, well, prior to my 92 3.8l supercharged (lol)superpoop tbird, was a 383 wedge without a single emission item on it. The electronics there consisted of a distributor, coil(with wire), sparkplugs (with wires), an alternator and voltage regulator. and for the positioning of the sensor, one could index the old sensor with a sharpie before removal, transfer the mark onto the new one, install it and be reasonably sure they will have a running engine afterwards, provided it ran in the first place, couldn't they?

Trust me when I say, even with my two left hands, consisting of 5 thumbs each, and my half blind eye, anyone that has any mechanical aptitude at all can remove that upper intake. I was so freaked out about it before hand the seals sat in the map pocket of my ex for two weeks, and I didn't buy them until well after my initial post looking for advice.

I have step by step instructions, hard copy, that I can scan for anyone that would like a copy. Just PM me and ask for them, I'll make them into a pdf and send them out, diagrams and all.

 

[pj8847]

a 383 wedge without a single emission item on it. The electronics there consisted of a distributor, coil(with wire), sparkplugs (with wires), an alternator and voltage regulator.

Ahhh, the good ole' days! where fuel adjustments were made by changing metering rods, bending float arms or re-jetting, and the only emissions worry anyone had was wondering if they should install the cherrybombs or the glasspacks, or just leave the open headers.

I miss those days, technology is suposed to make our lives easier...Yeah Right!

As far as just anyone doing the upper intake... well, some of the people I know can barely change a spark plug, and doing something like an upper intake they would be like a bull in a china shop, things will get broken...LOL Guess that is why I'm always called, I believe anyone owning a vehicle should at least be able to do basic maintenance, and having manuals for the vehicles you own is just good practice.

aha!
on the earlier OHV's I always saw just a distributor block off plate for the top of the oil pump drive. You guys sure the pre OBD-II trucks have a sensor in there?

Yes sir, there is indeed a sensor used in pre OBD-II applications, '95's use them, '94's, *some* '93 and thats about it. If i remember correctly, anything before '93 used the crank sensor to sync the injector pulse, which would explain why the dist. location was just blocked off. ( well, it wasn't really blocked off as the unit installed still had to drive the oil pump )

If i'm being cryptic, please excuse, as it's 3am WELL past my bedtime...

 

[tmh6202]

Ahhh, the good ole' days! where fuel adjustments were made by changing metering rods, bending float arms or re-jetting, and the only emissions worry anyone had was wondering if they should install the cherrybombs or the glasspacks, or just leave the open headers.

I miss those days, technology is suposed to make our lives easier...Yeah Right!

If i'm being cryptic, please excuse, as it's 3am WELL past my bedtime...

I wouldn't be able to type at 0300, that is waaaaay past my bedtime.

Yes, I miss the ole days too. Although Flowmaster and Dyno whomever do a pretty good job with newer engines and good sound/exhaust flow, you cannot, I do not care how you do it, beat the sound of a big block, nicely tuned with headers and a set of cherry bombs! I was sitting at a light last week when a 69 or 70 396 SS Chevelle pulled up next to me. At idle I felt like I was in a quarter operated bed at a cheesey no-tell motel (not that I'd know about such things), and when he took off you could feel that 396 go, man it was nice.

I guess in a sense, the big three did make it easier for the end user, you do not understand, you take the car to the shop. They didn't say that the technology would make it cheaper you know.

Later!

 

[pj8847]

A good friend and neighbor of mine has a 70 SS Chevelle convertible with a monster 454BB, pure power, but he decided to keep it mellow on the sound and went with some lame mufflers. I told him to go with Flow's, Now he gets all jealous when I pull out my 425hp 400 SB Camaro running 3" pipe into 2 dual chamber 40 series flow's. Most of my other neighbors complain, but just sitting there listening to the chunky idle and and feeling the rumble through the whole car is worth the police reports...lol, and once they leave, that's when I get my payback and light up the tires down the block.

Abosolutely correct, nothing like the sound of a healthy BB OR SB when it's breathing out through a nice set of flowmaster's.

I also like to add that THANK GOD, or whatever is up there they never passed that "clunker" bill, or we all wouldn't be able to enjoy the way things were.