Question about 2001 Nissan Sentra

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Idle flatutes my idle keeps going up and down.difficult to start after changing fuel pump.you have to gas while starting.help my car please

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Tps sensor is unplugged or defective. is check engine light on?

Posted on Aug 25, 2008

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The throttle valve and idle speed control valve may be sludged up, clean them and retest the problem. Buy a can of spray carb cleaner, spray it through the intake until about half the can is used up with the engine running, you will need to hold the idle up or engine will die, disconnect the battery for 5 minutes then reconnect.

Posted on Aug 25, 2008

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I can start truck when it is cold and runs ok until starts to warm up and idles down, then cuts off. Can't start again except with starting fluid and will only continue to run when that runs out if you...


Well not knowing what kind or year of vehicle it is. I'll take a generic stab here. If you've changed the pump and filter, and you're not running a mile of rubber line on this vehicle, then I'd say go after your fuel pump regulator. (easy way to check is if the vacuum line going to the FPR has gas in it when you take it off then the FPR is probably bad. Another thought is (with some helping hands) start the vehicle and while its just starting to run rough like it's going to die, press the scheader valve on the fuel rail and see if it has a good volume of gas coming out of it. if not then trace backwards to the FPR. it could also be the fuel pump relay under the hood, you should have 2 or 3 relays that are identical, try switching one around and see if it stays running. Hope this helps.

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th sorry th
at answe dont make any sence considering he said it wont run when he touches gas.. how is he going to keep it reving if it stalla as soon as he touches the gas?????

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