A Ghost lives in my car
Thread Starter
Instructor
Joined: Nov 2007
Posts: 109
Likes: 0
From: Toledo España
A Ghost lives in my car
Hi my friends.
It´s incredible, but yes, a ghost is in my 86 Vette.
That´s because i have 12V at ECM injectors wires (D15 and D16), but 3,5V at INJ1 fuse and 0,01V at INJ2 fuse (with key ON and unplugging one by one, not both at the same time).
The ghost is really happy when i disconnect the 32 pin connector at ECM, because he plays with it and gives to INJ1 fuse 12V
I mean, with 32 pin connector disconnected, i have 12V at INJ1 fuse and 0 at INJ2 fuse. Obviously, i have no pulses at injectors.
Reference is good, and remember, the ECM sends 12V signal to Injectors, but there´s something wrong between them.
Edited, more information:
At fuses box, we have this values:
-ECM fuse ON, and INJ1, INJ2 both removed, we have 3,5 V at INJ1 and 0,03V at INJ2.
-ECM fuse removed, we have 12V at INJ1 and INJ2.
So when ECM fuse is on, there is not enough power at INJ1 and 2
Resistance at injectors is fine, 10 ohm at left and 12 at right.
With a test light, i tested both terminals at each injectors with engine ground. Both has light, and when i touch ground with one of the terminals, i can hear that injector´s bank pulsing.
And one more thing.
I have 5 different ECM´s and 2 PROMS. The car only runs with one ECM, but with a very rich mixture and no codes (ses is on, but scan doesn´t work with this ECM). It´s so strange that values are the same with this ECM...
What could it be? Have i to do a Ouija?
Regards from Spain and thanks
P.D: It´s an 86 auto L98 stock car. No codes.
It´s incredible, but yes, a ghost is in my 86 Vette.
That´s because i have 12V at ECM injectors wires (D15 and D16), but 3,5V at INJ1 fuse and 0,01V at INJ2 fuse (with key ON and unplugging one by one, not both at the same time).
The ghost is really happy when i disconnect the 32 pin connector at ECM, because he plays with it and gives to INJ1 fuse 12V
I mean, with 32 pin connector disconnected, i have 12V at INJ1 fuse and 0 at INJ2 fuse. Obviously, i have no pulses at injectors.
Reference is good, and remember, the ECM sends 12V signal to Injectors, but there´s something wrong between them.
Edited, more information:
At fuses box, we have this values:
-ECM fuse ON, and INJ1, INJ2 both removed, we have 3,5 V at INJ1 and 0,03V at INJ2.
-ECM fuse removed, we have 12V at INJ1 and INJ2.
So when ECM fuse is on, there is not enough power at INJ1 and 2
Resistance at injectors is fine, 10 ohm at left and 12 at right.
With a test light, i tested both terminals at each injectors with engine ground. Both has light, and when i touch ground with one of the terminals, i can hear that injector´s bank pulsing.
And one more thing.
I have 5 different ECM´s and 2 PROMS. The car only runs with one ECM, but with a very rich mixture and no codes (ses is on, but scan doesn´t work with this ECM). It´s so strange that values are the same with this ECM...
What could it be? Have i to do a Ouija?
Regards from Spain and thanks
P.D: It´s an 86 auto L98 stock car. No codes.
Last edited by spanishvette86; Aug 21, 2009 at 02:33 PM.
Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
Hi my friends.
It´s incredible, but yes, a ghost is in my 86 Vette.
That´s because i have 12V at ECM injectors wires (D15 and D16), but 3,5V at INJ1 fuse and 0,01V at INJ2 fuse (with key ON and unplugging one by one, not both at the same time).
The ghost is really happy when i disconnect the 32 pin connector at ECM, because he plays with it and gives to INJ1 fuse 12V
I mean, with 32 pin connector disconnected, i have 12V at INJ1 fuse and 0 at INJ2 fuse. Obviously, i have no pulses at injectors.
Reference is good, and remember, the ECM sends 12V signal to Injectors, but there´s something wrong between them.
What could it be? Have i to do a Ouija?
Regards from Spain and thanks
P.D: It´s an 86 auto L98 stock car. No codes.
It´s incredible, but yes, a ghost is in my 86 Vette.
That´s because i have 12V at ECM injectors wires (D15 and D16), but 3,5V at INJ1 fuse and 0,01V at INJ2 fuse (with key ON and unplugging one by one, not both at the same time).
The ghost is really happy when i disconnect the 32 pin connector at ECM, because he plays with it and gives to INJ1 fuse 12V
I mean, with 32 pin connector disconnected, i have 12V at INJ1 fuse and 0 at INJ2 fuse. Obviously, i have no pulses at injectors.
Reference is good, and remember, the ECM sends 12V signal to Injectors, but there´s something wrong between them.
What could it be? Have i to do a Ouija?
Regards from Spain and thanks
P.D: It´s an 86 auto L98 stock car. No codes.
Team Owner
Joined: Sep 2003
Posts: 20,179
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Former Vendor
Joined: Nov 2006
Posts: 2,482
Likes: 3
From: Carmichael ca
This isn't correct. The 12 volts to the injectors is supplied by the ignition switch through fuses. The ECM grounds the other side of the injectors to turn them on.
Thread Starter
Instructor
Joined: Nov 2007
Posts: 109
Likes: 0
From: Toledo España
Post #1 edited for more information.
Thanks...
Nice...but, i hate that.
Ok, where is that ign switch? How could i test it?
Thank you.
Thanks...
Thank you.
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