Question about 1994 Jeep Grand Cherokee

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Well lets see it runs normal cold and on the open road but if you let it sit while running after it warms up it starts running as if its starving for gas or at low speeds its got me puzzled and i've pulled every sensor

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  • Richard Scordino May 11, 2010

    Checked fuel pressure? the pump may be going away or the filter may be partially clogged.

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  • Master
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Try looking for vacum hose leaks and look for the one leading to the egr valve

Posted on May 05, 2010

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1993 Chevy C1500 4.3L V6 TBI starts but dies at idle after warming up.


Low pressure from fuel pump, when the pump is cold the pressure increases, as it warms up the pressure drops (this happens in a pump that is going out) the normal pressure should be at 40 with the key on and engine not running, when started the pressure should stay around 36, any less it won't idle and may run as long as you hold the pedal down. The injectors are opened electronicaly, so as long as there is fuel flow the engine gets fuel to run.So check the fuel pump, soundslike you need a new one

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Just on cold start up the engine runs lumpy for about one minute, then the rest of the time it runs fine.


Make sure the block heater is working. But with high altitude and cold air this is somewhat normal for a diesel on cold start. If the glow plug indicator light flashes off and on quickly in the dash you may also have a burned out glow plug(s), this also causes a poor cold start.

Oct 18, 2012 | 2002 Volkswagen Jetta TDI

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97 acura 3.2 tl temp gauge doesnt read anything stays at cold doesnt move at all, whats could it be???


Your thermostat which closes when cold to let the engine warm up and opens when the water gets hot and lets it circulate through the radiator. If they stick closed your engine overheats in short order. When they stick open it takes forever and a day for the heater to warm sufficiently. This also makes the engine use more fuel. If your thermostat is indeed stuck open it is easy to tell. With the engine cold, take the radiator cap off and start the engine. If it is stuck open water will immediately circulate as seen at the radiator cap opening. If the thermostat were operating normally you would not see water moving for 5 or more minutes of idling. You should always drain the coolant, flush and refill every 2 years. Never ever grab that garden hose and put tap water in your radiator. They come from the factory with distilled water (about $1 a gallon at any grocery store) which has no minerals in it. The minerals in tap water promotes rust and scale build-up in the cooling system reducing it's efficiency. Don't use tap water unless you WANT to have problems.

Jan 03, 2012 | 1998 Acura TL

1 Answer

Have a 90 f-250 5.8 gas burner. sat in a warehouse for 2 years. new battery and gas. starts and idles great. run up rpms for 2 minutes and it starts choking out. let off fuel and goes back to idling...


Carburetta is fouled. Run fine on choke - rich mixture. As it warms up and choke pulls off, its starving for gas.
First try adding fuel system cleaner to the gas tank. Do NOT go overboard. No more than double the recommended mix ratio.
The alternative is to remove the carb, open the bowl and spray out the jets and venturi with carb cleaner.

Its possible you may help it by removing the air filter and spraying every orifice you find on top of the carb. With carb cleaner. Be very carefull not to flood, pool carb cleaner in intake as this is not healthy for engine either. You can do this with engine running, so as not to pool, but slowly is best, both in engine speed and volume of carb cleaner.

Jun 22, 2011 | 1990 Ford F250

1 Answer

1990 Deville 4.5 litre v-8 vacuum present from vacuum line to egr selenoid but no vacuum from egr selenoid to egr valve the car runs fine when cold but runs poorly when warmed to operating temperature.


You will not see any vacuum from the egr solenoid until the engine has reached normal operating temperature and certain other driving conditions have been reached (like throttle position and road speed). If the engine runs rough when warmed up, check the CTS (coolant Temp sensor) when hot and cold and if no fault shows there, start checking input sensors for engine and cam position, engine timing, RPM etc. If the EGR valve was leaking, it is only adding air to the exhaust stream and usually, manually opening the valve and blowing out the seat with compressed air should fix the issue. This can also be an issue with clogged injectors. When the engine is cold, fuel enrichment supplies more then normal fuel amounts to encourage even running. When the engine warms up (normal operating temperature), fuel enrichment mode is turned off. If your injectors are clogged (even if only slightly) fuel starvation will cause rough running. Fuel enrichment overcomes the starvation of clogged injectors. Try adding a propriety injector cleaner to your fuel tank and watch for an improvement. If you do see an improvement, have your injectors cleaned and tested professionally. If you locate any other issues with engine sensors, replace them and ensure the new components are adjusted correctly if required..

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1 Answer

Car runs great then stops like its starving for gas, let it sit for couple hours then it starts up again


Check the ignition module, and fuel pressure when the trouble is present. Those are the two things on Neons that cause this problem

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2 Answers

Fuel problem


Clean battery cables. Check crank sensor, next time it will not start pour water on the sensor and if it cranks you will know what to replace.

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