my 94 gmc sierra 1500 will start then dies and then wont start again for awhile


Asked by moneypit2 Nov 30, 2013 at 09:09 PM about the 1994 GMC Sierra 1500 K1500 SL 4WD Standard Cab SB

Question type: Maintenance & Repair

i will start my truck and it will idle for alittle bit then it dies and wont start again for alittle while.  you can smell fuel like it is flooded.. can anyone help plz, pretty much have replaced everything, becoming a money pit

6 Answers

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yes, the intake air temperature sensor is sending bogus data or disconnected~ hop&spd=9043524995793856051

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this little goodie replaces the heat riser, stove kit, diverter, heat riser and thermal choke with two position throttle....all that in one goodie~

3 out of 3 people think this is helpful.
Not Active ~38.50 .... could be worse~

John Saffrahn

Intake air temp is not going to cause the engine to flood out, especially on an obd 1. Check your fuel pressure, could be the filter is clogged lowering the amount of available fuel and pressure, could be the pump is weakening with the increase in temperature from running both would not provide enough fuel preventing it from getting burnt properly causing the raw fuel smell. Could be a broken fuel pressure regulator diaphragm, causing the engine to actually flood out when it warms up and tries to idle down. Also check for spark after it dies, could be the coil or the pickup getting warm and quitting until it cools.

2 out of 2 people think this is helpful.

would an oxygen sensor in a 1990 sierra 1500 let the engine start and then die..i have to turn the key off then restart then it runs for 5 seconds then dies..if i keep doing this.. eventually it stays running..20 stars and stalls later..

1 out of 1 people think this is helpful.
John Saffrahn

Probably not, since it reverts to open loop when it's faulty and the data isn't read from it until the engine is up to temp. Open loop is a default presetting in the ecm that is run on a cold engine. You have either a fuel or spark issue.

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