98 Chevy Cavalier z24

Hi you have from the postings i have seen on here you must have one of the least reliable cars in the history of motoring.

take a look at the following and see if any are of use good luck.. you will need it

http://cr4.globalspec.com/search/sitesearch?do=show&sort=textmatchrank&srch=cavalier&order=asc

A lot of time an ABS light coming on can be a sign that the alternator is starting to go. If the voltage output starts to decrease the ABS is one of the most sensitive items in the car to power and will start to show issues, sometimes before the battery light of the car. I would check the alternator output at idle, it may be too low and then when you step on the gas and increase RPM the output increases enough that all runs normal. Good Luck!

Shawn

Thanks, I will have that checked. It does have the original alternator, so it could be a possibility.

Check for what I think is called a TPS or TPC. It may be called something similar. I beleive it is short form for "throttle position sencor" or "controll". I have seen this before.

I had similar problem and it was throttle position sensor, although I would experience it only when the peddle was pressed to a certain position. Manual transmission with shift and gas wore out the sensor.

I don't know a thing about the Cavalier, but any time I hear of a pulsating idle, my first thought is "Is your air conditioning ON?" The compressor cycling on and off will cause the idle to change.

Bill