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While driving my 1998 poetic bonneville when i hit the gas to pass a car or to go up a hill my car starts to jerk and the rpms start bouncing up and down.

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Common problem with poetics-low fuel pressure at the injectors can cause fuel starvation when the demand is increased. You need to check the fuel pressure to verify or eliminate a fuel problem with the lurching when you mash the gas. And verify it is not a transmission harsh downshifting problem. You would be shifting from 4th gear to third if you pressed the gas to pass another car, or get to the top of a hill. If you can duplicate the lack of engine rpm's to move up steadily and stay at high rpm, with the car in park, well there you go-not the transmission or torque converter clutch but an engine problem. If you have followed regular maintenance, check fuel pressure and have the engine computer scanned for possible related trouble codes. If you have neglected maintenance, it's time to re-badge your Pontiac with a good old tune up.

Posted on May 13, 2014

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: 1990 Toyota Celica GTS. Idle races too high

sound very much like a vacuum leak.... also maybe your timing is off? possibly advanced? try retarding it with the distributor if thats the case...

Posted on Feb 01, 2009

  • 107 Answers

SOURCE: 1997 pontiac grand am gt v6 3.1 problems

you have a short in the steering colum

Posted on Jul 20, 2009

  • 10 Answers

SOURCE: 1998 Pontiac Bonneville SE 3.8L Backfires/ Sputters

sounds like the ignition module is going bad.

Posted on Aug 04, 2009

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Hello
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

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sounds like the ignition module is going bad.

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