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  #1  
Old 04-25-2011, 09:13 AM
leftofsanity leftofsanity is offline
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Default 94 2.3L Rough Idle/Stall Scanner error codes

Hello all, looking for some ideas/knowledge.

94 2.3l

Truck will not idle, it will just stall out. If you hit the gas I can keep it running, but it doesn't sound/feel right. About a year ago the timing belt broke, and I replaced it and it ran OK since then. I recently replaced plugs and wires hoping that would help, but didnt. The plugs looked clean.

I used a Actron code scanner, and the KOEO code was 159 - (That was my fault, forgot to plug the MAF sensor back in, but that didnt help)

Then I got alot of continuous memory codes as follows:

157 - MAF too low
158 - MAF too high
172 - HEGO sensor - voltage indicates lean
211 - PIP sensor fail
214 - Cylinder ID sensor fail
224 - Primary Circuit Fail in Coil 1,2,3 or 4
332 - Insufficient EGR flow

o try the KOER test, I just wedged a bolt on the throttle just enought to keep it running and according to the scanner book, I should get a Engine ID code first, but all I get is code 998 and 224 right away.

998-Engine Control system operating in Failure Mode and Effects Management (FMEM) programming strategy

224 - Primary Circuit Fail (like above)

Where do I begin?
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  #2  
Old 04-28-2011, 01:15 PM
ddunfee ddunfee is offline
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Default Re: 94 2.3L Rough Idle/Stall Scanner error codes

I would start by checking the IAC valve. Clean it and see if it looks OK or maybe just replace it for $30
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  #3  
Old 04-28-2011, 01:35 PM
mickblock mickblock is offline
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Default Re: 94 2.3L Rough Idle/Stall Scanner error codes

If you are wedging a bolt to keep the throttle open you will NOT get accurate KOER test results. Everything is compared to throttle position sensor input.

The only good the scanner will do you in this situation is to read MIL codes.

Like the previous person said. start out with old fashioned mechanical diagnosis.
Also are the plugs and wires the correct part # Motorcraft or Autolite and gapped correctly? If they or any brand besides those, they can cause pronounced symptoms.

If those codes ARE from your MIL being on and not just your KOER test result check fuse 43 - TPS/actuator and fuse 44
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Last edited by mickblock; 04-28-2011 at 02:01 PM.
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  #4  
Old 04-28-2011, 05:57 PM
leftofsanity leftofsanity is offline
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Default Re: 94 2.3L Rough Idle/Stall Scanner error codes

Quote:
Originally Posted by ddunfee View Post
I would start by checking the IAC valve. Clean it and see if it looks OK or maybe just replace it for $30
$30?

I havent found one for less than $70.

----------

Quote:
Originally Posted by mickblock View Post
If you are wedging a bolt to keep the throttle open you will NOT get accurate KOER test results. Everything is compared to throttle position sensor input.

The only good the scanner will do you in this situation is to read MIL codes.

Like the previous person said. start out with old fashioned mechanical diagnosis.
Also are the plugs and wires the correct part # Motorcraft or Autolite and gapped correctly? If they or any brand besides those, they can cause pronounced symptoms.

If those codes ARE from your MIL being on and not just your KOER test result check fuse 43 - TPS/actuator and fuse 44
The only codes I got when trying to run the KOER test was

998 and 224, and those codes showed right away, there was no engine ID code first.

All the others were continuous memory codes.
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  #5  
Old 04-29-2011, 04:44 AM
ddunfee ddunfee is offline
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Default Re: 94 2.3L Rough Idle/Stall Scanner error codes

Wow I just replaced my 95's IAC for about $35 but check the 94's and it is much more $57 at autozone.
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  #6  
Old 05-05-2011, 05:46 PM
leftofsanity leftofsanity is offline
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Default Re: 94 2.3L Rough Idle/Stall Scanner error codes

Well, I checked the timing, and it seems to be fine. Pics included of marks.

A next step suggested to me was to test fuel pressure.

Whats the best way to test coils?

Any other ideas?

The IAC valve was stuck open, the diaphram inside stayed wherever I moved it.

I cleaned it and if I open it all the way, it will close most of the way on its own.
Attached Images
File Type: jpg CamShaft_Timing_Mark.jpg (103.7 KB, 8 views)
File Type: jpg CrankShaft_Mark.jpg (17.3 KB, 10 views)
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  #7  
Old 05-06-2011, 04:26 AM
4b316 4b316 is offline
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Default Re: 94 2.3L Rough Idle/Stall Scanner error codes

Do you have a cam sensor or the dummy plug?
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  #8  
Old 05-07-2011, 10:47 AM
leftofsanity leftofsanity is offline
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Default Re: 94 2.3L Rough Idle/Stall Scanner error codes

Quote:
Originally Posted by 4b316 View Post
Do you have a cam sensor or the dummy plug?

Not sure. How would I tell?
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  #9  
Old 06-03-2011, 10:29 PM
dbaya dbaya is offline
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Default Re: 94 2.3L Rough Idle/Stall Scanner error codes

My 94 2.3 truck came back from the shop. It was running rough on the freeway. Idle was not the best. It never stalled on me. It had 5 error codes and most were fixed by replacing the ignition module.

The last code was "214 - Cylinder ID sensor fail". This was fixed by replacing the camshaft synchronizer. Base looks simular to an old distributor. The gear end on the left had a lot of side to side play. I would say 1/8" of side travel. Must have some worn/broken bushing or bearings.
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  #10  
Old 06-07-2011, 07:37 AM
leftofsanity leftofsanity is offline
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Default Re: 94 2.3L Rough Idle/Stall Scanner error codes

Funny you should say hat about the Camshaft sensor. here is an Update:

Long story short,

Issue with truck. Found no spark issue on cylinders 2 & 3 on exhaust side coil pack. Swapped with another, same issue.

Figured it was the ICM. I was in the process of taking off the wiring connectors to the ICM. Top and bottom came off fine, but when I removed the bottom, I found a loose wire going to nothing. It wasn't on the connector, but went to the same harness.

It was a single black wire, going to a connector, with a single wire coming out the other side, but looks like it pulled out/broke off somewhere. I cant find where it went to. The wire coming out is a clear plastic, with some kind of material sheath underneath covering the copper wires.

I thought maybe the Camshaft Position Sensor, but that has all 3 wires going to it.

Anyone know? Any help is appreciated.
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File Type: jpg Loose Wire.JPG (89.1 KB, 13 views)
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