Question about 2000 Chevrolet Malibu

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Smells like gas when running and gas gauge rises and falls when car is in park. Car also idles hard like there is a misfire

We have replaced the fuel pump, the fuel regulator, and spark plugs (for misfire).

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  • Expert
  • 176 Answers

Check for a cracked injector

Posted on Apr 22, 2014

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Posted on Jan 02, 2017

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soc21610k
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SOURCE: 2001 Chevy Cavalier Misfire

Have you made sure your getting spark on every cylinder from the coil pack?

Posted on Jun 04, 2009

  • 1986 Answers

SOURCE: 1997 2.2L base Cavalier idles rough and randomly stalls

Have they checked your TPS sensor as this is the most common cause for rough idles and stalls...

Posted on Aug 21, 2009

  • 1201 Answers

SOURCE: Burning smell,check engine light-misfire, rough idle 96 cavalier

Sounds like there is a blown piston, to be sure have a compression test done on that #2 cylinder, if the reading is low, then you'll know.
A friend of mine had a 95 that did simular things only a little more,
it started smoking, dash lights flickered, etc. Finally, he had to get rid of it, the piston rod went through the engine block.

Posted on Feb 02, 2010

  • 1 Answer

SOURCE: Engine is missing and shaking bad when idleing or driving slow

MY CHECVY ASTRO 92 ,,STARTS FINE IT JUST SHAKES WHEN IN IDLES IN DRIVE OR REVERSE..HAVE NEW WIRES AND DISTIBUTOR

Posted on May 30, 2010

  • 1 Answer

SOURCE: 5.3 L Missing and Rough Idle Intermittently

i have a 2001 chevy z-71 5.3L. I keep getting a random/multiple misfire code for cylinder 1 . I have replaced plugs, wires, coil pack(only on #1 cylinder)., and fuel pump. I still keep getting the cylinder 1 misfire code. I put truck on a scanner and watched the cylinders. # 1 misfires at idle but quickly stops misfiring at around 1000 rpms. you can here the engine miss at idle but truck runs great on road . anyone else ever had this problem?

Posted on Jun 09, 2010

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1 Answer

1995 jeep gr cherokee laredo jumps when first star in morning and runs rough when ac or heat on


my guess, car unseen.
car has an A/T trans, and all A/T jump from park to drive
selection is made on a cold engine, due to the very fast idle speed.
what was the park and cold idle speed. and out door temps.
the lower out door temps, make idle speed , cold engine, even higher
but when the engine reaches 180F or more and holds, the RPM
is about 800 RPM (the FSM tells the exact amount and does vary for the unstated engine option) so at 800 the tranny don;t lurch, did it on a hot engine. so if idle speeds are wrong say so and say it with engine temps. or its all meaningless.
next :
runs rough, the engine (even parked?) is called misfire.
misfire on a good engine (full compression)
is:
1: bad spark (or never had a tune up ever) every 60k miles.
2: bad fueling. too rich, too lean (low idle) bad injectors (stuck or clogged, or wrong fuel pump pressure or bad Fuel pressure regulator)
3: bad fuel.

there is a test for each possible failure. all very simple test.
it takes $80 in gauge tools to find engine problems.

Dec 30, 2013 | 1995 Jeep Cherokee

1 Answer

Pressure in the AC keeps rising and falling.


was the pressure gauge connected to the discharge side or the suction side of the compressor
if you have it connected to the suction side , you have excessive gas in the system

Jun 04, 2017 | 1999 Ford Escort

1 Answer

Rough idle multipule misfire


Hi. The most common cause that I have found for an " only idle misfire" is low compression. The engine needs at least 100 psi of "dry " compression to idle smoothly in most cases and if any cylinders are higher or lower by more than 20 percent of any other cylinder, you will also have an idle misfire condition felt. Should you perform a compression test, make sure to disable the igntion system completely, not just move the ignition wires out of the way as you will still have spark and the fuel injectors will still inject fuel in nearby proximity to possible ignition source. Always perform two tests, "dry" and "wet" compression. "Dry" is warm engine with spark plugs removed. "Wet" is after performing "dry" test add a few drops of light oil into cylinders and perform compression test again to see if the number rise. If they rise, you have worn piston rings or cylinder walls. If they do not rise, you likely have worn valve seats, misadjusted valves, or head gasket issues, possibly cracks in the cylinder head. If you need to know how to compression test with a tester in detail, message me back and I can help. I'm assuming you may already know due to the fact you state you replaced all the parts likely by yourself so you probably have strong technical merit.

Aug 09, 2012 | 1999 Honda Civic

4 Answers

5.3 L Missing and Rough Idle Intermittently


i have a 2001 chevy z-71 5.3L. I keep getting a random/multiple misfire code for cylinder 1 . I have replaced plugs, wires, coil pack(only on #1 cylinder)., and fuel pump. I still keep getting the cylinder 1 misfire code. I put truck on a scanner and watched the cylinders. # 1 misfires at idle but quickly stops misfiring at around 1000 rpms. you can here the engine miss at idle but truck runs great on road . anyone else ever had this problem?

May 05, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

98 saturn sc stalls when in park after engine is warm?


A broken vacuum line will affect idling and performance. The plastic ones break and the rubber ones split or fall off. A vacuum gauge is a cheap tool that will tell you a lot about your car.

May 04, 2009 | 1996 Saturn SL

1 Answer

Heat gauge


Before getting too upset about this, try changing the temperature sender. Can't tell you where it is but it is usually on or near the thermostat housing but some engines have it on the intake manifold or rear of cyl head.

Apr 04, 2009 | 1993 Pontiac Sunbird

2 Answers

Engine misfiring/fuel coming out exhaust


Sounds like you may need to inspect and replace your fuel line from front to rear. no other reason for your problem.

Nov 29, 2008 | 2001 Dodge Caravan

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