99 gmc not staying running

[runnrich]

hello everyone out here. I have a 99 gmc ext cab 2wd with a 5.3 engine.
I'am wondering if anyone has had a problem with the engine starting and then quiting about 1 sec later . there are no light that come on to indecate that theres a problem. this only seem to happen when its about
-10C. the only way to get it to run is to keep trying to start the engine and than it will finaly stay running after about 50 tries. if anyone knows what the problem maybe please get back to me.
thank you all.

[BryanCregger]

well you need 3 things for the engine to run so check first to make sure your air filter is clean...then check for fuel... and lastly spark.

[runnrich]

hello BryanCregger the problen is not that simple. when the engine does start is will run for months and that act up again with out chageing a thing. i have a friend with the same problem and he took his to the dealer and sent over $2000.00 and he still has the problem.

[Streakn]

At $30 try the crank sensor

[leolkfrm]

temp switch controls the rich idle for cold weather. put it on a good scan tool and check its readings

[stumpuller454]

money down its fuel pump, but get her checked for fuel pressure *AND* volume about 1 pint ina minute or so is good.

[junior3382]

You say that after you finally get it started it runs for a few months. When it acts up, how long does it sit before you try it again? Or when it does is it right after you buy fuel at the same gas station?

I would think it is not the fuel pump, only because of the infrequency of the issue, I think it could be moisture in the fuel. Therefore I would be willing to bet a can of dry gas occasionally with random fill ups might help. Being that cold, moisture can freeze in the fuel lines, and prevent delivery to the engine. So perhaps dry gas can prevent that, and on the cold cold days, you should be fine.

Just my theory here, take it for what it is.

[03chevy]

you can check this out.
1Inspect Battery Damaged or faulty battery and/or connections. 2Inspect Coil - Ignition Damaged or faulty ignition coil or ignition coil circuit. 3Inspect Fuel Filter Clogged or dirty fuel filter 4Inspect Fuel Injector Pressure Regulator Faulty fuel injector pressure regulator or circuit. 5Inspect Fuel Pump Improperly functioning fuel pump or circuits. 6Inspect Wireset Damaged, worn, or deteriorating spark plug or coil wire(s). 7Inspect Control Module-Ignition Faulty ignition control module or circuit. 8Inspect Solenoid Switch Damaged or faulty solenoid switch or solenoid switch circuit. 9Inspect Starter Damaged, worn, defective, or faulty starter or starter related circuit. 10Inspect Neutral Safety Switch Damaged or faulty neutral safety swittch or circuit. 11Inspect Fuse Corroded, burned, or shorted fuse may be interupting power source. 12Inspect Fusible Link Corroded, burned, or shorted fusible link may be interupting power source. 13Inspect Battery Cable Corroded, broken or poorly connected battery cable. 14Inspect Spark Plug Wire Loom - Performance Improperly adjusted or worn/malfunctioning carburetor. 15Inspect Distributor Cap Loose or cracked distributor cap 16Inspect Distributor Cap And Rotor Kit Loose, cracked, or worn distributor cap and ignition rotor. 17Inspect Fuel System Pressure Incorrect fuel pressure being delivered to carburetor or fuel injection system. 18Inspect Fuel Injector Plugged, dirty or poorly connected fuel injector. 19Inspect Ignition Switch Worn, damaged or faulty ignition switch or circuit. 20Inspect Spark Plug Fouled, damaged or broken spark plug(s).

[03chevy]

and this too.
21Inspect Belt Incorrectly routed, adjusted(tensioned), missing or worn drive belt(s). 22Inspect Timing Belt Slipped or broken timing belt. 23Inspect Timing Set Slipped timing chain or worn timing gear(s). 24Inspect Fuel Tank Contaminated fuel from rusted or deteriorated fuel tank. 25Inspect Timing Specification Incorrectly adjusted engine timing.

[stumpuller454]

Originally Posted by runnrich

hello BryanCregger the problen is not that simple. when the engine does start is will run for months and that act up again with out chageing a thing. i have a friend with the same problem and he took his to the dealer and sent over $2000.00 and he still has the problem.

Opps didn`t read that fact, my bad