SPONSORED LINKS

1988 Chevy Suburban fuel pressure loss

Tiny
BUD HENDERSON
  • MEMBER
  • 1988 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 15,000 MILES
Whenever this TBI engine has been off for a while it takes about 3 seconds of cranking to start. If you do a restart within a few minutes it fires right up with no delay. I suspect that there is a a loss of fuel pressure and it takes a few seconds to build up after sitting for a while. Is there a fuel pressure check valve some where that is a least partially bad?
Also, when driving and applying brakes before or immediately after having partially open throttle the brakes have no power boost. No problem if you get your foot off accelerator for a second. Is there a vaccum check valve that is not holding vaccum in the booster when the engine has reduced vaccum?
SPONSORED LINKS
Wednesday, April 23rd, 2008 AT 5:22 PM

1 Reply

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
You may either a bad fuel pressure check valve, or more likely a leaky injector.

Have them checked, make sure the cap is on the check valve.

For the brakes I would definetely check the checkvalve. It is located on the brake booster or inline on the vaccum hose from the engine to the booster.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, April 23rd, 2008 AT 8:16 PM

Please login or register to post a reply.

Related Fuel Pressure Content

Fuel Pump Pressure Test
VIDEO
Fuel Pump Pressure Test
Instructional repair video
VIEW MORE

Sponsored links