Question about 1987 Toyota Pickup

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Kocking and missfiring when in low rpm or in overdrive

Changed coil/wires/spark plugs.dis cap.mass air flow.tps.good gas press.

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Check the engine timing

Posted on Jul 21, 2009

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How to fix uneven engine performance when press gas pedal, on parking.and engine reach 3000+ rpm's engine start to sort of choke with uneven acceleration.


ok, sounds like you covered the basics with spark. I would check in this order; 1-Throttle position sensor, sometimes it wears out and you get poor signal back to computer, 2-clean MAF sensor, 3-check/clean IAT (intake air sensor). If this still doesn't help then I would check your fuel flow....but i'm thinking its your tps. Two screws will change that out quickly.

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98 Pontiac GRAND am


The plugs and crank sensor could have done it, but the TPS and idle air control would have nothing to do with a random miss.
A more likely cause is the ignition module or a fuel problem. You may have to wait until the problem is bad enough to kill the engine or you have more codes to check out.

May 20, 2013 | Cars & Trucks

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Skips when cold and ck engine lite is on.Spark plugs have been changed. Fuel injection cleaner added to gas. Code comes up multiple missfires.any Ideas on what to do next to fix?


may be you should make a diagnostic and you can do it in a garage or you can do it by yourself if you want to do it by yourself you need some tools and you can find some good ones here: xcardiag.com

Mar 30, 2013 | 2000 Toyota ECHO

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96 acura tl 2.5 rough idle after warm up with rpm swings ignition and fuel pressure good sparkplugs black and new codes; primary o2 heater circuit bad missfire cyl.5 random missfire


REPLACE DISTRIBUTOR CAP AND ROTOR REPLACE SPARK PLUGS AND WIRES IF NOT BEEN CHANGED IN LONG PERIOD OF TIME.CHECK IGNITION TIMING.CHANGE AIR FILTER CLEAN FUEL INJECTORS.IF ENGINE STILL MISFIRE IGNITION COIL IS WEAK OR YOU HAVE LOW CYLINDER COMPRESSION.

Jul 21, 2011 | 1996 Acura TL Series

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When the vehicle is placed in gear the rpm's drop low and it almost stalls. if i press the gas the rpm's drop even lower, if i hold the gas slightly at this ponit it will slowly begin to go and starts to...


sounds like an intake manifold gasket leak which will throw of the air fuel mixture and engine cannot account for extra air.also check(maf)(map)(tps)sensors and/or (iac)intake air control valve...hope this helps you. thanks for using fix ya please rate answer.

Apr 02, 2011 | 1993 Acura Legend

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I AUTO SCANNED MY CARE AND GOT CODES PO300 A RANDOM MULTI MISSFIRE, I CHANGED THE SPARK PLUGS AND WIRES. I ALSO HAD TO CHANGE THE FUEL PUMP THE GAS COMPRESSION WAS AT 18 AND THAT WAS AFTER TURNING IT ON 15...


go to any auto parts store and buy a can of maff sensor spray, and clean maf sensor. it can get dirt in it and make it mess up. follow directions on can. also make sure air filter is clean and free of dust and dirt. to remove it is in air flow from air cleaner box to throttle body . remove the hose then the wiring connector, then remove maf sensor for cleaning. let dry then reinstall. first dis connect maf sensor and if it is better then the maf is your problem. there are many things that cause backfiring, you may need proper equiptment to diagnose problem. you can try the coils they could be bad.

May 29, 2010 | 1999 Pontiac Grand Prix

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Hi, I have a 2006 Altima with 31,500 miles. Recently, the engine start shaking when car is Idle but I still feel the shake when driving or at red lights. My second problem is a weird loud (humming) noise...


You don't need to change the spark plugs since it has only 31.5 K. The plugs should last 60K. There is a an adjustment at the gas cable end at engine to increase the idle a little bit. You can increase rpm at idle to 600 RPM. Since your RPM at idle is low that why it is shaking at idle, red lights. Let me know it it is shaking at high speed ( 2500 RPM)

Sep 13, 2009 | 2006 Nissan Altima

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