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1989 Oldsmobile 88 Cold start issue

Tiny
CUSTOMSLOTCARS
  • MEMBER
  • 1989 OLDSMOBILE 88
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 125,000 MILES
I have an 88 Royal Brogham. When I start the car it runs idles fine but if I apply gas it is very rough and sometimes stalls. After it warms up it runs fine. I replaced o2 sensor, plugs and wires. No luck.

any ideas?
Thursday, May 27th, 2010 AT 8:22 AM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Check fuel pressure with mechanical gauge first, should be above 40psi and increase 3-4psi when throttle is blipped.

Also check fuel pressure regulator vacuum line for presence of gas, if there, then diaphram on FPR is ruptured and is needs to be replaced.
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Thursday, May 27th, 2010 AT 8:51 AM

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