91 Explorer Not Starting Getting Close Please Help
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91 Explorer Not Starting Getting Close Please Help
This is a 91 Explorer with a 4.0L.
I have worked on this for a week and I think I am getting close. Please help if you can. Here is where I am on this.
Turns over good but not firing.
1 Good gas pressure at the test valve on the rail.
2 Getting good spark.
3 Sprayed starting fluid in intake and engine started fine.
4 12v on one side of injectors
5 Getting NO ground pulse from the PCM computer to other side of injectors when cranking.
Is there any sensor or anything that would keep the PCM from issuing a ground pulse to the injectors???
I am starting to think my PCM is bad. Any info would be greatly appreciated.
I need to get this thing going. Thanks, Mike
I have worked on this for a week and I think I am getting close. Please help if you can. Here is where I am on this.
Turns over good but not firing.
1 Good gas pressure at the test valve on the rail.
2 Getting good spark.
3 Sprayed starting fluid in intake and engine started fine.
4 12v on one side of injectors
5 Getting NO ground pulse from the PCM computer to other side of injectors when cranking.
Is there any sensor or anything that would keep the PCM from issuing a ground pulse to the injectors???
I am starting to think my PCM is bad. Any info would be greatly appreciated.
I need to get this thing going. Thanks, Mike
