1987 Pontiac Grand Am Ignition Wiring Diagram

Check the hose clips for tightness and examine the trunking for any cracks or splits and moreover all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best pretentiousness to locate a leak is to have the engine government and warm and subsequently spray can lighter gas /propane or brake cleaner approaching each joint in turn. If the engine rev s stirring you ve found your leak.

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Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me say you a little more virtually the suffering history. It currently has a master tech approved idle air run valve and tps installed. without disturbing anything, the last (used) ecu and my original, would govern in the car without this symptom.

as soon as I begin the car, the engine surges taking place in the company of 1200 and 2000 rpm incite and forth. I distorted the IAC and the TPS in the manner of no modify in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to become accustomed the idle speed screw to subjugate the rpm and it would sustain for a while. Now, the engine is permanently surging to the lessening where I cannot steer it for panic of broken to the drive train. Any experienced solution?

Picture Schematics for 1987 pontiac grand am ignition wiring diagram

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