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Can a bad gas cap cause rough idle - Pontiac Cars & Trucks

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

haileyscrazy
  • 18 Answers

SOURCE: where is the PCV valve on a 2002 Chevy Impala?

Tech jk is right
I HAD THE SAME PROBLEM IT'S THE FUEL PRESSURE REGULATOR REPLACE IT AND YOUR PROBLEM WIILL GO AWAY

Posted on Jan 13, 2009

  • 133 Answers

SOURCE: runs very rough...like it has bad gas. had a

You need to take some where that has a scan tool to find out what fault codes are set.

Posted on Nov 25, 2009

dj_ricko_198
  • 128 Answers

SOURCE: rough idling,rough acceleration then runs decent when i back off

you may need to clean the injectors
what you can do is
you can buy some injector cleaner and see if this helps
make Shaw you get a decent brand as the cheep ones do not work as good
drive around with this in your gas tank
when you have in in your gas tank it helps clean them if you do some harsh acceleration but don't race the motor and don't speed
in other words get to the speed limit fast
this will apply pressure and will push through any gunk build up
there may be some smoke for a while from the exhaust but is will go back to normal when the fuel injector has finished cleaning and all the build up is gone
hopes this helps


Posted on Dec 29, 2008

co7196
  • 3433 Answers

SOURCE: running rough, wont idle, bad gas smell

Possible injector failure. locate by disconnecting injectors one at a time. The one that makes no change is the questionable. Status of spark plugs need chkg also. pull the plugs an the one that looks washed is questionable good luck

Posted on May 22, 2009

cshubart
  • 146 Answers

SOURCE: 1991 pickup with 3.0 6cyl Very rough idle while

try a tune up plugs, wires, air filter,check fuel filter clean throttle body check for restrictions with you exhaust

Posted on Aug 30, 2009

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4 Answers

What would cause 93 chevy c1500 rough idle smells of excess gas at exhaust


Does the truck seem fine when you first start it & then acts up when it reaches operating temp?
That would lead me to look at my oxygen sensor, a bad sensor can cause the truck to run "rich" which would explain the fuel smell in the exhaust.

Jun 28, 2014 | 1993 Chevrolet K1500

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Engine idles rough slightly when hot There are no stored codes upon scan,


Check and/or replace radiator cap. A bad cap can cause low coolant pressure and the engine will idle rough.

Apr 12, 2011 | 1998 Ford Explorer

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I got an diagnostic and it said the idle air valve is bad.i got it changed but its still runnin rough


A idle speed motor will not cause your engine to run rough.It might idle high or stall. If your engine is running rough check your spark plugs and wires along with your cap and rotor first.

Dec 02, 2010 | 1991 Cadillac DeVille

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What causes my ford escape to rough idle occasionally?


Could be a fault in the Evap system (a loose/defective gas-cap), water in the fuel, defective I.A.C. is possible.
When the rough idle issue occurs does the engine light come on?

May 14, 2010 | 2005 Ford Escape

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When my 1996 Jimmy gets to a half a tank the gas gauge goes crazy and will go to empty then back to half. I acts like it is running out of gas. It also has a rough idle. What could be causing this...


The wire harness to the fuel pump sending unit may be going bad which is common to happen. The harness is around $15.00 and it runs from the frame to the top of the gas tank. The other thing to is the fuel pump sending unit may be going bad and the float in side that measures the amount of gas, has gone bad and the unit may need to be replaced. As for the rough idle, it cold be related to the fuel pump starting to go bad and the fuel pressure is just marginal to keeping the engine running. The fuel pressure during cold start should be 62-65 PSI and should drop about 5 PSI when the engine is running. The other thing to that would casue a rough idle, would be time for a tune up, "spark plugs, wires and distributor cap and rotor, fuel filter"

Feb 08, 2010 | 1996 GMC Jimmy

1 Answer

1996 Galant runs rough until gas pedal pressed about quarter way down,then runs fine.Car is running lean.Not sure how to check if fuel pump is working correct,or maybe MAS?


You should have your TPS and EGR looked at as those cause rough idles...Other causes are bad idle air control valve, bad plugs, bad distributor cap & rotor, a bad wire, bad O2 sensor, etc...

Aug 25, 2009 | 1996 Mitsubishi Galant

1 Answer

1999 F250 4x4 Rough idle, miss when warm. No CEL.


I know this will sound Stupid But, Change the Cap Cap. If the Seal is Bad on the Cap it will allow air Into the Fuel tank and Cause your Rough Idle.

Jan 23, 2009 | 1999 Ford F250 Regular Cab

1 Answer

2003 gmc yukon wont idle


I know that this will sound Stupid. Change the Fuel Cap. If the Seal on the Gas Cap is Bad it will allow Air to get into the Fuel tank and cause your Rough Idle.

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1 Answer

Very Rough Idle and sometimes cuts off while idling





sounds like bad Idle Air control valve Not Cheap


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Jan 06, 2009 | 1993 Nissan Maxima

1 Answer

Rough idling and choke


the only thing that can cause this is maybe you have a bad planium gasket but before changing this you could also have gotten some bad gas cause most gas have 12% water or more so try STP gas treatment first

Nov 28, 2008 | 1996 Ford Escort 4 Door

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