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Surging problem and cause
Well I took the value craft module out and put old one back in, got the truck started again and of course same problem (no injector pulse at idle). I ordered an AC Delco ICM on Ebay for 25 bucks and it will be here in 2 days so in the mean time I'm going to install some 2" drop shackles. I will...- kevinde1
- Post #13
- Forum: Tech Discussion
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K
Surging problem and cause
The P/N switch works like it should as far as the A/C switch I'm not sure how to check that. A/C doesn't work, it's there maybe low on Freon, guessing that's not what you mean by checking the switch. Thanks for all the good input I'm gonna call it a night for now and try to get my hands on a...- kevinde1
- Post #11
- Forum: Tech Discussion
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K
Surging problem and cause
Well I pulled the ignition control module went to the local parts store picked up a cheap value craft one that's all they had, compared some ohm reading on the 2 and there was a lot of difference between the 2. installed the value craft one and I'm getting spark but now no injector pulse at all...- kevinde1
- Post #8
- Forum: Tech Discussion
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K
Surging problem and cause
yes I did test 2 and 3 and they both check out. Thanks for your replies- kevinde1
- Post #6
- Forum: Tech Discussion
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K
Surging problem and cause
I have done the test on the MAP sensor and it checks out perfectly. My thought about the ICM is because what is essentially killing my motor is the injector pulse shuts off. When you apply 20hg to the map sensor which is exactly what the engine is pulling (19-21hg) it starts killing the...- kevinde1
- Post #4
- Forum: Tech Discussion
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K
Surging problem and cause
Here's an update changed thermostat to make sure I have a 195F. Fuel pump is wired in with a toggle switch to make sure ECM is not shutting off fuel pump. I have a code reader no codes are coming up. If hook up the MAP to the vacuum behind throttle body I can keep running if I work the...- kevinde1
- Post #2
- Forum: Tech Discussion
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K
Surging problem and cause
Hello guys I'm new to the forum but I've been visiting it regularly since I've bought this truck. I recently bought a 1987 SWB with 5.7l TBI. When I got the truck it had a surge that seemed to get better once it was warmed up. I thought no big deal its a good deal I'll figure it out (lol)...- kevinde1
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- Replies: 53
- Forum: Tech Discussion
