Corrupted PCM / SPOUT Circuit
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Senior User
Joined: Feb 2006
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From: Ellington, Connecticut
It stays running which would mean a short.
But I cut that wire at the PCM connector & it stayed running.
There is no possible ground when you cut it down that far....????
But I cut that wire at the PCM connector & it stayed running.
There is no possible ground when you cut it down that far....????
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Senior User
Joined: Feb 2006
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From: Ellington, Connecticut
When I run the self diagnostic there are 3 steps for EEC-VI and have noticed that in step 2, the timing step, engine will go through it's stored codes than will try and "bump up"; as if it were trying to advance it's own timing but instead of increasing it goes back to idle speed.
Yesterday I pulled the PCM wire harness out into the engine compartment to check & see if the shield that goes around the SPOUT wire was grounding out...-0- resistance. I'll have to wait before trying to unhook the IAC while engine is running tomorrow working outside & raining here in cow-country Ellington, Connecticut.
After working at this for over a week now I'm at the point now were confusion is taking over.
And this is a time when you are glad to be not employed.
Yesterday I pulled the PCM wire harness out into the engine compartment to check & see if the shield that goes around the SPOUT wire was grounding out...-0- resistance. I'll have to wait before trying to unhook the IAC while engine is running tomorrow working outside & raining here in cow-country Ellington, Connecticut.
After working at this for over a week now I'm at the point now were confusion is taking over.
And this is a time when you are glad to be not employed.
Last edited by crazypaw; Mar 31, 2008 at 01:31 PM. Reason: more wording
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Senior User
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From: Ellington, Connecticut
I did a point-to point wiring check on SPOUT wire had infinate ohms.
Pulled out the SPOUT connector -0- ohms.
Tried continuity check from ground to SPOUT wire -0- ohms.
Pulled out the SPOUT connector -0- ohms.
Tried continuity check from ground to SPOUT wire -0- ohms.
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Senior User
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From: Ellington, Connecticut
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Thread Starter
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Senior User
Joined: Feb 2006
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From: Ellington, Connecticut
Looks like our posts have crossed comrade.
I feel that you correct about the module.
This is a 1990 truck do you think the module needs to be replaced?
Another question if you don't mind: does the ignition module have to be externally grounded?
I feel that you correct about the module.
This is a 1990 truck do you think the module needs to be replaced?
Another question if you don't mind: does the ignition module have to be externally grounded?
Last edited by crazypaw; Mar 31, 2008 at 01:55 PM. Reason: more wording
Thread Starter
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Senior User
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From: Ellington, Connecticut
You have worked on the BEST comrade.
My wife will be happy that I have to buy another part.
We bought so far: PCM, EVR;was shorted out, now this ignition module.
And the Ohms reading on pin 3 of the module to test it and does it have to externally grounded??
My wife will be happy that I have to buy another part.
We bought so far: PCM, EVR;was shorted out, now this ignition module.
And the Ohms reading on pin 3 of the module to test it and does it have to externally grounded??
Last edited by crazypaw; Mar 31, 2008 at 02:25 PM. Reason: rewording