1987 Chevrolet Blazer Drivability problems

1987 CHEVROLET BLAZER
58,000 MILES
Avatar
LWSANDERS
  • MEMBER
  • 2 POSTS
I have 1987 chev s 10 blazer with 2.8 eng. starts and runs at idle just fine. When u acccelerate to about 20 mph the engine just looses all power, just like severe exhaust restriction. Had exhaust checked only has 1lb back pressure. I have changed I A C motor and T P S. Fuel pressure builds up to about 14 psi, while idling, but falls to zero when u shut engine down.any help would be helpful. Thank u
Jul 2, 2013 at 12:24 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
If the fuel pressure drops quickly when you shut the engine, there must be a leak somewhere in the fuel system. Have you checked for that? Also, does the engine rev normally in neutral? Have you checked for vacuum leaks around the engine compartment as well as the intake manifold?
Jul 2, 2013 at 1:03 PM
Avatar
LWSANDERS
  • MEMBER
  • 2 POSTS
If u block off return line to fuel tank pressure will hold at 14psi. cannot locate any air leaks around tb, or intake. Rebuilt throttle body. no improvement. cleaned all body to frame grounds. need wiring diagram for ecm, and under hood. to make sure i have found all grounds for the elect system. engine acts like it is running out of fuel when throttled. will act up a little when in neutral.
Jul 4, 2013 at 3:56 AM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
I don't know why, but this just showed up in my mail. Sorry it has been so long. Have you had any luck with the issue?
Aug 10, 2013 at 2:39 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle