1999 Ram Van No Start
Captain
Joined: Jul 2019
Posts: 580
Likes: 50
From: Florida
That's a bizarre one. It appears everything works as it is supposed to, but, the PCM still doesn't want to pulse the injectors......
As your van doesn't have anything in the way of factory security..... Bad PCM is the only thing I can think of...... Is there a local yard you can get one from, and see if that one will actually run the engine?
As your van doesn't have anything in the way of factory security..... Bad PCM is the only thing I can think of...... Is there a local yard you can get one from, and see if that one will actually run the engine?
LOL maybe --- I look every time I go...out of 50 times I found ONE - and my b---of an ex sold it on me GRRRRRRRRR
Thread Starter
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Registered User
Joined: Aug 2025
Posts: 7
Likes: 0
That's a bizarre one. It appears everything works as it is supposed to, but, the PCM still doesn't want to pulse the injectors......
As your van doesn't have anything in the way of factory security..... Bad PCM is the only thing I can think of...... Is there a local yard you can get one from, and see if that one will actually run the engine?
As your van doesn't have anything in the way of factory security..... Bad PCM is the only thing I can think of...... Is there a local yard you can get one from, and see if that one will actually run the engine?
Robert
Administrator
Joined: Apr 2010
Posts: 87,434
Likes: 4,217
From: Clayton MI
Injectors are purely controlled by the PCM. The relay will trip for three seconds at first key on, then disengage, until the PCM sees the engine turning..... (crank sensor)
This one is really confusing, as the PCM obviously CAN control the injectors, your test proved that... hopefully...... Now, why it doesn't want to??? That is the real question. If it sees cam and crank sensor signals, it *should* run..... but, it doesn't....... If it is NOT the PCM, I have no clue what would **** it off to the point that it won't......
This one is really confusing, as the PCM obviously CAN control the injectors, your test proved that... hopefully...... Now, why it doesn't want to??? That is the real question. If it sees cam and crank sensor signals, it *should* run..... but, it doesn't....... If it is NOT the PCM, I have no clue what would **** it off to the point that it won't......
Thread Starter
|
Registered User
Joined: Aug 2025
Posts: 7
Likes: 0
Injectors are purely controlled by the PCM. The relay will trip for three seconds at first key on, then disengage, until the PCM sees the engine turning..... (crank sensor)
This one is really confusing, as the PCM obviously CAN control the injectors, your test proved that... hopefully...... Now, why it doesn't want to??? That is the real question. If it sees cam and crank sensor signals, it *should* run..... but, it doesn't....... If it is NOT the PCM, I have no clue what would **** it off to the point that it won't......
This one is really confusing, as the PCM obviously CAN control the injectors, your test proved that... hopefully...... Now, why it doesn't want to??? That is the real question. If it sees cam and crank sensor signals, it *should* run..... but, it doesn't....... If it is NOT the PCM, I have no clue what would **** it off to the point that it won't......
I’ll try back probing them on the scope to make sure they look right and grab an ecu if they check out ok.
I’ll update this thread when I find a solution or find something else interesting.