Question about 1989 Pontiac Bonneville

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1989 pontiac bonneville going on its own.

1989 pontiac bonneville trouble. It acts like it is going to go on its own. The rpm gauge jumps up as it jumps forward.it does this in idol and while driving.

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Try replacing the throttle position sensor

Posted on Oct 03, 2009

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Posted on Jan 02, 2017

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Limiting rpm when driving no more then 4000rpm


there is fuel system cut off. the ECM think that the rpm is higher than what it should be, have a scan data read to see if ECM read different rpm of rpm gauge. rpm reading come from ignition module and crank sensor

Aug 14, 2013 | 2002 Pontiac Bonneville

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Can''t find a/c high pressure port 1989 bonneville 3.8v6


You don't charge with the hi side port. Use the low side on the accumulator. The hi side port is on the compressor if you want to connect a maniflod gauge set to it.

Aug 03, 2012 | 1989 Pontiac Bonneville

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My gas gauge doesn't work in my 2003 bonneville. What can i do to fix this problem, along with my broken gas gauge my heater in my drivers side seat is no longer working, i would appreciate any help thanks...


It might not be anything wrong with your fuel sending unit. Keep an eye on your other gauges. I own a 2004 Pontiac Bonneville GXP. All of my gauges have started acting erratically. It started with my Temp. gauge, moved on to my speedometer, and now my oil pressure , fuel level and batty volt gauges are affected too. Its a very common problem with GM vehicles.

Nov 12, 2009 | 2004 Pontiac Bonneville

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1993 Pontiac Bonneville


1. Air filter dirty
2. Bad engine ground connection.
3. Loose connection in the ignition system.
4. Faulty idle control system.
5. Faulty emissions or engine control system.
6. Fuel not reaching the injectors.

These are the 6 most common solutions. For yours, i would certainly be checking the engine ground cable, as your gauges are acting up too. Take it right off, clean the rust if there is any. Bend it back and forth every inch or so to see if there are any breaks or melted spots in it. Or, better yet, just throw it away and get a new one. Good luck, hope this helps.

May 01, 2009 | 1993 Pontiac Bonneville

1 Answer

98 Pontiac Bonneville intermittent miss cold or hot


misfires are also from low fuel pressure and bad injectors
run a can of quality injector through the system to see if that improves the problem

May 20, 2017 | 1998 Pontiac Bonneville

2 Answers

High oil pressure reading


Oil sending unit bad. Replace.

Mar 01, 2009 | 1989 Pontiac Bonneville

1 Answer

1995 pontiac bonneville stalls


I just went through lots of troubleshooting and expense on my 1996. Whenever I would lift my foot off the accelerator and was below about 30 mph, the rpm's would starts jumping around and sometimes it would stall. If I gave it a little gas (accelerator), I could sometimes keep it running. It also backfired once in a while. Starts right back up. Also, if I let it idle while in part, it would die after 1-2 minutes.

I ended up finding a hole in the fuel regulator. About a ~$70 part if you get an AC Delco, but very simple to change.

Nov 27, 2008 | 1995 Pontiac Bonneville

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