new ECM
Thread Starter
Cruising
Joined: May 2013
Posts: 13
Likes: 0
new ECM
Installed rebuilt ecm unhooked NEG batt cable and plugged in all color coded terminals hooked NEG batt cable back to batt and inserted key and turned key to on position waited till fuel pump pressurized and turn key to start it turned over for 2 full rotations and fired up then stalled . Every time I try to start it it runs for a sec then stalls , I definetly missed a step, or do i need it plugged in at a shop to teach it how to run or relearn a running cycle .Please any help would be great.
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
Assuming the new PCM was programmed with the proper engine calibration the engine should start and run.
Have you shorted pin 4 to pin 12 on the diagnostic connector above the drivers right knee and verified if any codes are set?
You never mentioned checking the fuel pressure with a gauge.
Pull the vacuum hose off of the fuel pressure regulator and verify there is no
fuel in the vacuum hose.
After the engine runs for a second and then shuts off have you verified
by cranking the engine if there is still spark to the plugs?
What happens if you reinstall the original PCM are the symptoms the same?
Have you shorted pin 4 to pin 12 on the diagnostic connector above the drivers right knee and verified if any codes are set?
You never mentioned checking the fuel pressure with a gauge.
Pull the vacuum hose off of the fuel pressure regulator and verify there is no
fuel in the vacuum hose.
After the engine runs for a second and then shuts off have you verified
by cranking the engine if there is still spark to the plugs?
What happens if you reinstall the original PCM are the symptoms the same?
Le Mans Master
Joined: Feb 2005
Posts: 6,494
Likes: 566
From: Clearwater Florida
..... What was it doing that caused you to change the ECM in the first place ? ... basically the ECM is not receiving the necessary feedback from the ignition system that tells it that the engine has started ... OR ... your fuel pump is not up to the task ... put a fuel pressure gauge on it and start troubleshooting the issue ... if you do not have a Helms factory service manual , now is the best time to invest in one ..........
