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KC Steve KC Steve is offline
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Join Date: Apr 2011
Posts: 17
checking grounds 82 928

Hi Everyone
Still working on the 82 928. Got fuel ,spark & good AFC relay starts & dies starts & dies will run for about 2 to3 seconds if I spray carb cleaner in the intake it will stay running checked all fuses in the fuse box. Green wire from distributor to ignition box, is good 14 pin connector has no frayed or damaged wires. load tested grounds@ the processor pins 5, 16,17&35 all prove out. I have B+ on both sides of the connectors that goes to injectors. Processor not grounding to fire the injectors. causing no injector pulse. do not believe it is a bad processor rather still a wiring problem. Like most Porsches & VW's I have worked on ground are a problematic issue As far as the grounds. I know about the ground under the air diverter valve on the right side valve cover will cause this problem. Is this ground tied directly to the processor or to somewhere else on the vehicle
is there any other grounds that I need to confirm that are good that would cause no injector pulse. also one other thing that I do not think is right either pins 10& 29 on the processor that power up the AFC relay load test good with key off but when you turn the key on to start pin 10 goes dim (which makes think it is a ground issue& pin 29 goes out that powers up th AFC relay Ignition switch issue?
Don’t want to throw parts at the car Just believe I am missing on link in the chain to make the car run What does to processor need to see to ground the circuit to fire the injectors?
would greatly appreciate any suggestions or info to resolve my issue with no injector pulse
thanks
KC Steve
Old 06-10-2012, 11:04 AM
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