Question about 2006 Mitsubishi Eclipse

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Idles but will not rev up over to 2 grand and back fires thru the air filter, but idles just fine

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The fuel is exploding before intake valve closes your timing is off

the cam belt jumped a tooth or the ignition timing is firing to sooon

Posted on Aug 12, 2008

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Check your ignition timing; sounds a lot like it.
This can be caused by a failed crankshaft position sensor if your car uses one.

Posted on Aug 08, 2008

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1 Answer

Engine starts and idles fine, but will not rev up (2001 Jeep Grand Cherokee 3.1 diesel auto)


If it was a fuel shortage the engine would rev but to limited speed. This is a lack of air to throttle body. Check for clogged air filter and all the piping and the throttle body.

Sep 28, 2012 | 2001 Jeep Grand Cherokee

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I have a 95 Taurus sho that was not running right when I bought it. Since I have replaced crank and cam sensors, o2 sensors, knock sensor, wiring harness checked fuel pressure, checked compression,...


You did not mention the throttle body or the idle air control valve.
The computer controls idle speed by how much air is allowed to enter the intake manifold thru the throttle body.
If the idle air control valve is faulty, or there is a vac leak, or the throttle body is dirty, the computer can not keep the idle speed at the factory setting.

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1996 Jeep Grand Cherokee. When I stop at a light engine revs up and feels like it is trying to push the car. Then the car dies.It will start back and run fine after that.


Could be a sticking idle air control valve, or dirty throttle body.
The computer uses the valve to control idle speed by regulating the amount of air into the intake.

Jul 18, 2012 | 1996 Jeep Grand Cherokee

1 Answer

When at a stop light the car idles fine when i go to take off it sputters and back fires. I changed the spark plugs, but it is still doing it. It idles fine otherwise.


Does not sound like ignition, but fuel.
Idle needs little fuel.
Could be a clogged filter, water in the gas, bad pump, vacuum building up in the tank, bad sensors, etc.
Start with a gauge on the fuel pressure.
If it is low, that will point to filter or pump. Filter is cheaper to try.
If not low, then check the sensors with ohmmeter from Harbor Freight for $3.
There are O2, water temp, MAS, air temp, etc.

Jan 21, 2011 | 2001 Suzuki Grand Vitara

1 Answer

My oil pressure is dropping and at the same time my car is idleing to where it seems like my fuel pump is dying. Are the 2 related. If I step on the gas the oil pressure picks up and the my car gets gas...


Your oil pressure will increase and decrease with the speed of the engine. As long as your oil pressure increases, that's ok. The idle problem could be caused by a dirty fuel or air filter. I would start with replacing the fuel filter and check the condition of the air filter.

May 14, 2010 | 2001 Jeep Grand Cherokee

2 Answers

2000 grand prix, 3800 when it warms up losses power


I would have to say the fuel/water separator filter is clogged up. The filter will remove water and crud from the gas. It looks more like a small can under the car. If the car set up with a low tank of gas, water will condensate inside and once the new fuel sloshes around it gets all this junk off the walls of the tank and that gets sucked in the filter. Try and replace that first..

Mar 19, 2010 | 2000 Pontiac Grand Prix

1 Answer

Have a 1997 Jeep Grand Cherokee 2.5 Diesel. Idles


Change fuel filter and air filter. If that doesn;t help you may have a fuel transfer pump pressure problem.

Mar 05, 2010 | 1997 Jeep Grand Cherokee

1 Answer

Sputters When Idling


clean throttle body intake ,,,run cleaner, thru injectors or carb, check all air hoses and tighten,check air filter,,,check idle air,,,or replace idle air,,,they go bad

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