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1999 GMC K1500 Suburban starts then stalls

MasonGriffis

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MasonGriffis Enthusiast

MasonGriffis

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Hello everyone. I have a fun issue. My 99 suburban decided to die on me recently. Was running alright. Went into my parents for maybe 30mins. Came back out it fired up and then died maybe a half second to second after. Never had the issue before. Today decided to attempt to diagnose. It has spark. Distributer looks good. Changed the fuel pump with assembly and fuel filter. Also changed the cam sensor and crankshaft sensor. Lastly changed the ignition switch due to sometimes it acting up and messing with my gauges and transmission. Checked the idle control valve motor. Seems to be working. Cleaned the gunk off of it and the throttle body. Checked all the relays. All working. All fuses are good. Attempting the security passcode reset now due to running out of options. The security light isnt showing. But not sure if this suburban has one. Spray starter fluid into intake and it will run for a second longer then dies out again. Not sure what's causing it. thinking maybe fuel pressure regulator. Any ideas?

MasonGriffis Enthusiast

MasonGriffis

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Just finished it. No Darn luck. I dont have a security light showing at all. I'm dumb and reset the codes before going to my dads so I can't see if there was something that was potentially going bad before it happened. 

BlancoSilverado Enthusiast

BlancoSilverado

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A bad fuel pressure reg needs to be completely blown out to not have a no run, the fuel pump is always on(after start).

if you give it gas while it is starting and running will it idle or will it still die (keep your foot on the gas after it starts)?

 

riverbanks Senior Enthusiast

riverbanks

Posted
Posted

Rent a fuel pressure tester? other, maybe, disconnect MAF wiring and try it,they on occasion will fail that way, another is to disconnect coolant temp.sensor,unhooked is full"rich", just some ideas

CrystaledJazz New Member

CrystaledJazz

Posted
Posted

There is a fuse in the fusebox under the hood, its called something on the lines of body control or something, I think its a 10 amp fuse.  I had this problem and this fixed it.

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