What could be making my Bonneville not run?

Asked by Jul 17, 2016 at 06:14 PM about the 1990 Pontiac Bonneville

Question type: Maintenance & Repair

My Bonneville starts but runs very rich for a few minutes, then seems to get
itself worked out of it, runs good for about 2 minutes and then completely
quits. The only code the computer is saying is for a vacuum leak but I just had
all the intake gaskets replaced and hoses checked. And it does the same cycle
every time you try to start it - runs rich - to being okay - to quitting. So far
we've replaced the battery, intake gaskets, crank sensor, MAF sensor and map
sensor. The fuel pump and alternator were both tested as well. Anyone have
any suggestions as to something we might be overlooking? This has all of us
stumped...

2 Answers

58,285

Bad fuel injector,s.

1 out of 1 people think this is helpful.
56,575

Or a bad fuel pressure regulator. The fuel pressure regulator controls fuel pressure based on a vacuum signal from the intake manifold. There should be a vacuum hose going from the fuel pressure regulator to the intake manifold. Sounds like the vacuum hose is hooked up to throttle body vacuum which is different and will cause the fuel pressure regulator to not work correctly. HTH. -Jim

Your Answer

Add photo

Related Questions

  • 2002 Pontiac Bonneville not cranking 10 answers

    2002 Pontiac Bonneville non-supercharged is not cranking over when in START position. I have had the battery tested and it is good (only a year old). All the lights and gauges and other things even ...

    2002 Pontiac Bonneville SE

    -

    Maintenance & Repair

  • 1995 Bonneville wont start 24 answers

    I have a 95 pontiac bonneville not supercharged 3800 engine. The full pump doesnt come on have lost power windows and door locks and power driver seat. just put a brandnew egnition switch in the car...

    1995 Pontiac Bonneville 4 Dr SE Sedan

    -

    Maintenance & Repair

  • 2001 Bonneville SEI - Making a horrible noise when excellerating 3 answers

    Recently, after driving through a large puddle of water, (in case that matters) my Bonnie is making a lound noise when it reaches about 30 mph. She sounds like an airplane that's going to take off. Do...

    2001 Pontiac Bonneville SSEi

    -

    Maintenance & Repair

  • blower motor 2000 bonneville 1 answer

    My blower motor on my 2000 bonneville is making a loud clicking/rattling noise when running at high speeds. How do I remove it to check what is wrong?

    2000 Pontiac Bonneville SLE

    -

    Maintenance & Repair

  • what engines will fit in my 69 bonneville? 23 answers

    I have a 1969 bonneville with no engine, what size, make, years can I drop in there?

    1969 Pontiac Bonneville

    -

    General

Search Pontiac Bonneville Questions

Pontiac Bonneville Experts

#1 ticklemedaly
ticklemedaly
Reputation 350
#2 dandyoun
dandyoun
Reputation 310
#3 John Saffrahn
John Saffrahn
Reputation 300
View All

Related Models For Sale

Used Pontiac Grand Prix
24 Great Deals out of 3,767 listings starting at $1,995
Used Buick Regal
194 Great Deals out of 11,070 listings starting at $2,195
Used Buick LeSabre
6 Great Deals out of 2,379 listings starting at $1,768
Used Pontiac Firebird
13 Great Deals out of 816 listings starting at $3,800
Used Pontiac Grand Am
1,717 listings starting at $1,995
Used Chevrolet Camaro
644 Great Deals out of 39,147 listings starting at $2,995
Used Ford Taurus
363 Great Deals out of 22,225 listings starting at $1,499

Used Cars For Sale

2005 Pontiac Bonneville For Sale
107 listings starting at $2,298
2004 Pontiac Bonneville For Sale
84 listings starting at $2,944
2002 Pontiac Bonneville For Sale
80 listings starting at $2,495