Question about 1988 GMC S-15
Does the throttle body injected 2.8L V-6 in a 88 GMC S-15 have a fuel pressure regulator?
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Posted on Jan 02, 2017
SOURCE: fuel pressure regulator
How do you know that it is the regulator?
these 4.3 motors had a lot of trouble from 93 to 98, I know I had 2 of them.
What happened to mine was that the intake kept getting very carboned up. After I would clean it, the truck would run fine for about 5 or 6 months, then same thing.
Theres actually a class action lawsuit about this that I believe has been settled, you may have recourse if you bought it through a dealer. Good luck.You'll need it.
Posted on Dec 23, 2008
SOURCE: 2000 gmc rough idle
Im not sure if this can help, but my 2000 gmc sierra was idling badly. Replaced Fuel Pressure Regulator and my truck runs like its brand new. My service engine light was also on.
Posted on Jan 10, 2009
SOURCE: 1996 GMC JIMMY won't start
I think 54 p.s.i. on fuel pressure is close to border line, Are the injectors pulsating, You can have fire at the plugs but if injectors are not pulsating it will not run. I know there were problems with the injections systems on blazers and jimmys around that year, i would look closer to the injection system.
Posted on Apr 06, 2009
do you have any check engine lights on? If you do, that is the first thing I would have checked. It does sound like plugged EGR, vacuum leak, or bad TPS
Posted on May 15, 2009
had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!
Posted on Jun 06, 2009
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