Question about 1991 Toyota Pickup

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1993 toyoto pickup idles rough with or without ac on, but runs fine when given throttle. I have replaced plugs and wires, throttle position sensor?

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You may just have to service your yhrottle body and run a fuel injection service... also inspect your idle control motor.

Posted on Aug 05, 2010


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Could a lot of different things, remote diagnosis is difficult and you could replace a lot of parts guessing. I think this is a case where it is worth paying a good mechanic to at least make a diagnosis. You may choose to repair it yourself to save money, but I think it would be worth the $50 or so for proper diagnostics. Otherwise you could easily spend that much replacing good parts and not fix the problem.

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The Jeep was running fine, then just started shutting off. Then It ran rough and shut off. Replaced the ECU as recommended by a mechanic. Jeep will start up and idle for a few seconds and then run rough...

Have you checked the crankshaft position sensor. It is on the bottom forward part of the engine, real close to the hub for the fan. It has a wired plug leading to it. It tells the ECU when the number one piston is at top dead center. It needs this signal to stay in time. It sounds like it may be going out.

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1999 mazda pickup 2.5

It might be a fuel injector. Check injectors connectors they might be loose.

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Rough idle

check you throttle position sensor first then fuel pressure regulator, then fuel pump. i have a 92 and had to recently do a massive overhaul. my rough idle was caused by a malfunctioning tps with a small exaust leak causing it to race and an intake manifold gasket. also check your idle speed adjustment settings.

Nov 18, 2008 | 1992 Toyota Pickup

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