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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1993 gmc sierra 4wd runs rough after engine warms up.At stop lights she will stall out if i dont keep foot on break and give a little gas. any suggestions ?


Question, does this pickup blow black smoke on idle or at a stop sign. If so check your map sensor might be plugged up or unplugged or bad.

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My 93 jeep wrangler runs rough when excellirating, changed plugs and wires and distributer cap and rotorery button, idles fine


have car scanned--the injectors may hav issues-like dirty or the throttle position sensor also--cud be some vacuum leaks or and egr problem too--just cause theirs no engine lite on-codes can exist

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I have a 1993 isuzu pickup act like its not getting fuel runs fine at idle but under pull it starves the longer it runs the worse it runs


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.

Has it been tuned up recently (new plugs, wires, fuel filter, air filter)? If that needs to be done anyway, then do that, and see if it helps. Otherwise, pay for a diagnosis. It could be a mass air flow sensor, or throttle position sensor, or EGR valve, or oxygen sensor, or any of several other things.

May 30, 2011 | 1993 Isuzu Pickup

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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.

Oct 09, 2010 | 1993 Jeep Grand Cherokee

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1999 mazda pickup 2.5


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

May 08, 2009 | 1999 Mazda Pickup

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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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