Question about 1993 Pontiac Bonneville
Have vechicle code scan, faulty mass air flow sensor will cause engine run poorly stall out.sound like transmission could be slipping not going in over drive if vechicle cant go over 40 miles an hour.change transmission fluid and filter see it helps. mass air flow sensor has to be replaced most people try clean them but best to replace them.
Posted on Feb 13, 2012
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Posted on Jan 02, 2017
If wiggling the wires cured the code, then one of the wires is broken inside the insulation. Pull on each wire one at a time. look for the colored insulation to stretch, this will be the broken wire. For the other car that wont rev up, this is a common when the catalytic concverter is plugged up. This will also cause MAF codes, and in turn, TRAC OFF light.
Posted on Oct 17, 2008
No the stalling is caused by something else like a dirty fuel filter of bad fuel pressure due to a worn fuel pump. With a bad O2 and MAF sensor the ECM will go a on open loop mose for those sensors causing bad performance and gas mileage. Replace the O2 sensor and try cleaning the MAF with MAF cleaner and check the wire harness, look for any damages to the wires and replace if needed. As for the stalling, try replacing the fuel filter first and we can go from there. Keep me posted, be glad to help get your car running 100% and save you some money the same time.
Posted on Jul 09, 2009
Here is a diagram of the firing order for you 3800 engine. Cylinders 1 and 4 are misfiring because the operate under the same "Coil Pack" and the coil pack has unfortunately gone bad. O'Reilly sells them for between $30-50 depending on the amount of warranty coverage you want. To replace, simply unscrew the screws that hold the coil pack in place. WAIT before unplugging the plug wires. Place the old coil pack and new coil pack next to each other, unplug one plug wire, then plug it to that same port on the new coil pack. then do the same for the other plug wire. Then screw your new coil pack in place, and start you car. should run fine!
Posted on Dec 14, 2009
mass air flow sensor is located on the air hose that leads to the air filter if you have the part just look for the same look to make sure.
Posted on May 15, 2010
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