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I have a 1999 siverado w/4.8 truck will not stay running it fires but wont stay running

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CHECK FOR CODES. GOOD POSSIBLE PROBLEM MAY BE VACUM LEAK OR IDLE AIR CONTROL VALVE

Posted on Dec 15, 2014

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Check the air filter to see if that is plugged or real dirty. Otherwise, check the fuel pressure. If you don't have a pressure tester, most garages do.

Posted on Dec 15, 2014

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1992 dodge dakota fireing order and distribter


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My '99 chevy truck with 5,7L 350 will start but wont stay running. put new fuel pump and relay switch in


First you must determine if the fuel is stopping or the spark is stopping..If the fuel is stopping this could be a computer problem.. If the spark is stopping then it could be the IGN Module in the distributer. or any nomber of sensors. Squirt a little fuel directly into the Throttle body on the intake manifold.. If the truck runs longer its probably loss of fuel.. Do this several times to make sure, be careful and only use a small amounty of fuel.. you do not want a fire.. RE: Spark: Take a plug wire and an old plug..put the wire on the plug.. hold the plug against a good ground .. have someone crank the engine .. does the plug stop firing? The engine dies.. and will not restart for a minuet or so.. during this "no start" time do the plug test. If the plug will not fire during this time take the module out and take it to Orillys Auto parts.. They can test it.. really expensive part. Don't replace until you know it is BAD..

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1 Answer

Truck fires but wont stay running....... but everything was working great 8 hours ago


check oil pressure switch
after prime 3sec. the run relay for the fuel pump passes through
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99 cavalier starts but wont run. I changed engine wiring harness off 2000. (Old harness is destroyed.) had to change conectors for injectors and fuse box is slitely different. there is an extra plug (big)...


I would suggest two things. First check to be sure fuel pump relay is staying on after starting. If vehicle has a security system, make sure it is not activated.

Sep 03, 2017 | 1999 Chevrolet Cavalier

1 Answer

Will not start will try to fire but will not start


Check fuel pressure. try turning the key on and off 3 or 4 times, this will build up pressure to get it started, but probably wont stay running. Also your fuel filter could be completely clogged up, seen this a few times.

Feb 13, 2011 | 1999 Chevrolet Silverado 1500

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My guess would be the same as yours. Good job.

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Electric seats in 1999 Siverado move back & forth


the tracks for the seats are pressed out aluminum. they have motors that control the seat adjuster. it seems when worn they will not stay in place and need to be replaced. If anyone that is very overweigh this will create this problem sooner than expected
The seats are made to withstand 250 max. I have sold tracks by GM for 30 years and know personally what they can do in time from weight
(nothing personal)

Feb 20, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

Fires wont run


check the anti theft system

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Sounds like a fuel problem, when was the last time the fuel filter was chg.? If that is not an issue, than a fuel pressure test is in order, It should have around 48 to 50 p.s.i.

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