need help with my wife's 'burb...please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

manimal · 08-18-2010, 10:06 AM

Ok, last friday my wife was driving her '89 suburban(2wd,454 TBI,th400) and it would just shut off,and have a hard time restarting. You can no longer hear the fuel pump priming(usually ran for like 2 seconds then shut off),the the car would start. Now it seems to crank and crank then finally start,but run for a few minutes and shut off. After the initial start,it will start(hard) run for about 15 seconds and shut off. I have replaced the fuel pump(in tank) and filter, the coil and distributor module check out just fine. I have swapped around relays, but now I am stumped. Can anyone please help me out? Thanks
-Lance

BLE 'BURBAN · 08-18-2010, 10:55 AM

fuel pressure regulator. Same thing happened to my old 87 astro van. Got a rebuild kit for the tbi unit, installed it and the thing ran as good as new.
Regulator is mounted on the top of the tbi unit.

dropd80s · 08-18-2010, 11:17 AM

Also might want to make sure you have power to the tank and to the pump. I bought a 91 sub that would not start, the terminals on the in side of the tank on the bottom side of the pump/sending unit assembly were corroded just enough so the pump couldn't get any juice.

08-18-2010, 10:06 AM	#1
manimal Registered User Join Date: Oct 2006 Location: Southern Kalifornia Posts: 3,066	need help with my wife's 'burb...please Ok, last friday my wife was driving her '89 suburban(2wd,454 TBI,th400) and it would just shut off,and have a hard time restarting. You can no longer hear the fuel pump priming(usually ran for like 2 seconds then shut off),the the car would start. Now it seems to crank and crank then finally start,but run for a few minutes and shut off. After the initial start,it will start(hard) run for about 15 seconds and shut off. I have replaced the fuel pump(in tank) and filter, the coil and distributor module check out just fine. I have swapped around relays, but now I am stumped. Can anyone please help me out? Thanks -Lance __________________ ------------------------------------------------------ -Lance 2000 Chevy C2500, 5.7, 4L80e 1999 Suburban K2500, 7.4, 4L80e 1980 Camaro..son's car...PROJECT

08-18-2010, 10:55 AM	#2
BLE 'BURBAN In the Forgotten far North. Join Date: Jul 2007 Location: Anchorage, Alaska Posts: 2,627	Re: need help with my wife's 'burb...please fuel pressure regulator. Same thing happened to my old 87 astro van. Got a rebuild kit for the tbi unit, installed it and the thing ran as good as new. Regulator is mounted on the top of the tbi unit. __________________ 1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade

08-18-2010, 11:17 AM	#3
dropd80s Registered User Join Date: Mar 2003 Location: wichita falls tx Posts: 429	Re: need help with my wife's 'burb...please Also might want to make sure you have power to the tank and to the pump. I bought a 91 sub that would not start, the terminals on the in side of the tank on the bottom side of the pump/sending unit assembly were corroded just enough so the pump couldn't get any juice.



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