Question about 1994 GMC Safari

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Engine stalls. engine runs good even when idling.but sometimes engine just stops while running.try to start engine but wont start.starter working fine.after 5 mins engine will start again.i also hear constant humming from the fuel pump.

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  • Anonymous Mar 17, 2014

    wait 1 day with bat disconnected it will run for 10 min. or so then stop

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Fuel system or motor is slitly out of time

Posted on Oct 19, 2008

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88 f150 351w forever to start and when it does it runs real rough until I hold gas down for a minute then idle rough but will start right back up unless it sits awhile doesnt want to start back up


There are several possibilities for this problem. A "cold start" sequence is suppose to activate based on water temperature and the signal from the water temperature sensor. This makes the fuel rich and adjusts timing to make the engine run better when cold. It works like a choke only it is electronic.

There may be 2 sensors with one making the dash gauges work and the other doing the engine controls. If not 2, then 1 sensor would do the whole job.

Another possibility is an air leak in the fuel system which makes the system bleed dry overnight. It is far less common on gas engines but happens a lot on diesels.

Some earlier Ford engines from 1984 to I don't know when they stopped on trucks, would use a step-up solenoid on the accelerator bracket that worked off water temperature. Sometimes a bad water thermostat would make the temperature controls malfunction the other way (High idle, clicking, low idle) that would stall and engine as the temperature vary.

Feb 27, 2015 | 1988 Ford F 150

1 Answer

Stalls sometimes when stopped at lights engine misses at stop


Engine stalling and rough run issue at low speeds

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

Sep 04, 2012 | Cars & Trucks

1 Answer

Trouble starting & stalls when coasting


for starter problem check wire connection at starter,theres a single plug in wire that forms some corrosion clean it and it should work fine after.for other problem is check engine light on or came on,does it idle ok?

Jun 22, 2009 | 1993 Toyota Tercel

1 Answer

RUNS GOOD STALLS AT DIFFERENT TIMES; ae. STALLS HOT OR COLD


when you removed the water pump, did you disturb the timing in anyway ???

Jun 21, 2009 | 1992 Oldsmobile Cutlass Ciera

1 Answer

Car not idling adn stalling when it is cold


sounds like the idle control vale is sticking when it is cold. It is located on the throttlebody right at the air inlet

Feb 24, 2009 | 2001 Mercury Sable

1 Answer

1995 CHEVY VAN 20 305 WONT IDLE


Check your fuel pump presure. Pump is in the tank. Also try and loosen the fuel cap, the tank vent may be stopped up.

Feb 23, 2009 | 1995 Chevrolet G20

1 Answer

Stalling issues


Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Dec 08, 2008 | 1995 Pontiac Grand Prix

1 Answer

Rough idle stalls at low rpm's


hello first check your idle with the car running foot on brake see were your rpm reading is if your below 500rpm check your label underhood for your curb idle setting second see if theres a adjustment screw you can increase were your gas cable lever rest against your set screw underhood if you feel confident enough remove your iac motor idle air control valve if the bore were the end of the pintle extracts out to close has varnish builup our carbon it will stick creating vacuum leak type senario causing stalling rough idle sometimes even no start conditions good luck

Sep 14, 2008 | 1988 Honda Accord 4 Door

1 Answer

2002ford truck explorer when i frist start my truck it will stall out a few times then wiil run good for awhile then for some reason stall out 3 or 4 times some times i can drive for 150 miles with no...


it sounds to me that you idle controll valve isnt responding (could be dirty) get a can of carb cleaner and clean the thottle body inside and with the engine running. squirt just a little and the engine will start to stall and the idle air controll will start to open ( you will hear it start sucking) then spray more in sperts try to keep the engine running at idle . this will make the engine RPM's change and open and close the idle controll valve thus cleaning it. when done save some carb spray. put the air cleaner hose back on. and start the engine and with the engine idling spray around the intake and base of throttle body if the rpms change you have a vaccume leak than will need to be repaired.
good luck
tech rating 3

Aug 23, 2008 | Ford Explorer Cars & Trucks

3 Answers

Engine stalls


your on the right route but also check egr valve

Jul 07, 2008 | 1989 Buick Century

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