My 1998 buick park ave jerks when i press on the gas,the car has 85,000 mils,i have had my fuel pump changed and a sensor changed,but it stills jerks when i press on the gas,plus it stopped on me 3 times...
That sounds like a misfire. Change the spark plugs, your best value for those as opposed to the expensive ones listed in the manual are Autolite 105's. Get the copper core model and gap them to .060"
Also clean thoroughly or change your air filter and clean the throttle body. Also clean the MAF ( mass airflow sensor). That sensor is easiest to identify on your engine as the largest sensor and it is mounted into the top of the throttle body with two security type screws. If it is the original sensor it will also be labeled on the top with "ABC". Carefully remove the sensor by unplugging the wiring harness, loosen the security type screws and pull straight up. There will be an o-ring type grommet in the sensor mounting hole or it may still be attached to the sensor itself; don't lose it. It prevents air flow leaks.
To clean the sensor, look down inside the "shaft" part of the sensor. You will see two diodes. DON'T touch them. DON'T drop the sensor, or tap on it.
Use isopropyl alcohol that you can find in your local health&beauty department store sections, the 70% formula will work well. There's no necessity for special potion type expensive sprays or whatever that's on the market for cleaning your MAF.
Simply pour some of the alcohol over the sensor diodes and let it sit for a few minutes to dry. The diodes are clean when they look shiny. That is optimal and it getting dirty is commonly over looked on your particular car...cleaning it often does make very noticeable improvement.
Then it is ready to reinstall. Screw the it in by alternating between each one so that it mounts flat onto the throttle body; you don't want it to be able to leak any incoming air. Then before plugging the sensor wiring harness back in, now would be a good time to clean any corrosion or crud from the plug. You can use the same alcohol as before; pour on and let dry.
Feb 02, 2011 |
1998 Buick Park Avenue