20 Most Recent 2004 Pontiac Bonneville - Page 2 Questions & Answers


Walt, You will hear the fuel pump at times. When you take the gas cap off the fuel tank is acting somewhat as an echo chamber that is amplifying the noise of the fuel pump. Presumably the engine is ticking over when you remove the gas cap? Otherwise the fuel pump should not be running.

The fuel pump only supplies fuel on demand - obviously. The pump will run to pressurise the system to meet demand and if that demand for fuel fluctuates, the pump will run down or increase speed accordingly. This speeding up and running down of the pump is constant.

If by 'a miss' you mean that the fuel pump goes quiet for a second or so - that's normal. No demand for fuel - the pump doesn't run. That wouldn't effect the engine at tickover.

If the 'miss' is from the engine at tickover that's more than likely to be a plug.

If your car runs okay at speed and doesn't cut out and then will restart almost immediately, it sounds as though your fuel pump is okay.

2004 Pontiac... | Answered on Mar 21, 2016


Mass airflow sensor ? Is the check engine light lit ? What engine - 3.8 or 4.6 ? TPS - throttle postion sensor

2004 Pontiac... | Answered on Mar 19, 2016


check that the pins in the relay socket and the PCM connector are good and make contact youshouldsee12v at pcm... PCM is last resort. Check the fuel relay first for melting or burnt smell.

If you need further help, reach me via phone at https://www.6ya.com/expert/chris_b82b45c59bcf133d

2004 Pontiac... | Answered on Mar 09, 2016


connect it to the Hot wire for the radio

2004 Pontiac... | Answered on Sep 08, 2015


it the starter because that what happened to my truck but the lights were on in everything was working but it was starter that was wrong or might be the battery best is it the starter

2004 Pontiac... | Answered on Apr 17, 2015


check your battery and connections first

2004 Pontiac... | Answered on Mar 16, 2015


Go to your local autozone or advanced...it's free to have them tell you which code it is...prob a disconnected or bad sensor

2004 Pontiac... | Answered on Mar 09, 2015


in park warm to hot fluid, into the cross hatch marked area (level ground) if you have a dipstick some gm models just have a cap
the fluid level is checked from under the car there is a small bolt you remove (in tranny by axle ) runs out if full



2004 Pontiac... | Answered on Mar 06, 2015


Map sensor is probably not working correctly

2004 Pontiac... | Answered on Dec 06, 2014


Its a circuit breaker under the hood

2004 Pontiac... | Answered on Dec 06, 2014


Look at the body control module.

2004 Pontiac... | Answered on Dec 06, 2014


Swap it with the horn relay. If the windows work, then the original relay is bad.

2004 Pontiac... | Answered on Dec 06, 2014


stick a small screw driver in the spark plug boot, hold it 1/8 inch from a ground crank engine and see if there is spark, may take two people.

2004 Pontiac... | Answered on Nov 14, 2014


if you have multiple coils then there will be a regular misfire on a particular cylinder. If you have sets of coils then the coil that handles a set of plugs will misfire on those plugs. If you have one coil to do the lot then indicators are engine will not start, coil lead will show a weak orange spark when sparked to metal, engine will start fine and run for a period of time before the coil overheats and starts to break down ( misfiring), coil is very hot to the touch (burning ) after minutes of operation.

2004 Pontiac... | Answered on Nov 14, 2014


there is a tool that replaces the dog bone upper motor mount that allows you to roll the engine forward which tilts the engine to give you more access to the rear plugs. you can also remove the upper mount and using a large bar roll the motor forward and block into place will do the same.

2004 Pontiac... | Answered on Oct 14, 2014


you need a tool to rock motor toward grill it replaces motor mount just for this see most popular part stores will loan the tool

2004 Pontiac... | Answered on Oct 14, 2014

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