1991 Plymouth Laser RS Turbo 2.0

1991 PLYMOUTH
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ARKY187
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i have a 1991 laser it has a a few problems 1) idle speed is every where but nowhere near where it's supposed to be specs say about 750 i don't go any lower than 1000 i idle back and forth between about 1700 and 1000. 2) when i get on the throttle a puff of white smoke comes out my exhaust not sure what is the problem however today i dumped the clutch and a big cloud of black smoke came out the exhaust. 3) when i hit high rpm the engine sounds funny kinda like it's running lean 4) i installed a aftermarket boost gauge and when i'm @ WOT my boost gauge moves from 15psi to 5 psi with the gas pedal steady please help me the engine has had a head job recently (valves t-belt timing belt tensioners lifters the works everything on the top end) new wires,oil filter castrol synthetic 10-40 lucas synthetic stabilizer ngk platnium plugs 50/50 zerex antifreeze air filter
Jun 17, 2007 at 4:35 PM
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JACOBANDNICKOLAS
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Hi:
The black smoke indicated a rich fuel mixture. My concern is the white puff of smoke you mentioned. It sounds lke a bad head gasket. I realize you just had the work done, but I would check the head and intake for leaks. This could also be causing the problem with the idle.

Let me know what you find.
Joe
Mar 17, 2009 at 8:13 AM