what pcm do i need
Mountain Pass
Joined: Mar 2019
Posts: 183
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From: MO
I replaced my EEC-IV with a Cardone remanufactured unit from Rockauto. Do any of the ECMs in the below link match the # printed on your ECM?
https://www.rockauto.com/en/partsear...&parttype=2896
https://www.rockauto.com/en/partsear...&parttype=2896
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Fleet Mechanic
Joined: Mar 2014
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From: Saskatchewan Canada
It does not look bad. Not that you can diagnose from pics anyways.
Clean it up, replace the electrolytic caps.
Your backfiring and surging most likely are not caused by a faulty PCM.
Clean it up, replace the electrolytic caps.
Your backfiring and surging most likely are not caused by a faulty PCM.
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then what would you think it would be?
Fleet Mechanic
Joined: Mar 2014
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From: Saskatchewan Canada
PULL THE CODES!
I would check your base timing. Removing SPOUT disconnects the advance signal from the ICM, so you are running on base timing. Past that, check for vacuum leaks.
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That is probably the best clue you have given. BTW, this is post #3 or 4 on the same subject, so what I will tell you is probably info you already have heard.
PULL THE CODES!
I would check your base timing. Removing SPOUT disconnects the advance signal from the ICM, so you are running on base timing. Past that, check for vacuum leaks.
PULL THE CODES!
I would check your base timing. Removing SPOUT disconnects the advance signal from the ICM, so you are running on base timing. Past that, check for vacuum leaks.
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Joined: Dec 2018
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I don't know anything about your engine but on the 4.9 the timing mark on the balancer is very hard to miss and get confused with another mark. What I'm saying is double check your procedure and marks to make sure that is all correct.
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I did when I built the engine I used different colored paint pens to mark different points on the balance 0 ten and twelve