Hi there, i have a 98 sunfire with the 2200 automatic tranny.
At times it will rev/idle at a higher rpm then the normal, and sometime she will get all loopey and rev up and down on her own.
Today i was driving to work on the highway and I took my foor off the gas pedal and watched the rpm's on the tach and my rpm's would spike up, then drop, up, down all on its won without pressing the gas.
I am thinking some sort of sensor is acting up; maby throttle sensor, or air intake sensor..
And i have had cases where i was slowing down to a stop light and the car would sounds as if it were about to stall out on me.
Anyone exsperience these issues or simular issues that could give me some help in figuring out my problem with the old girl...
any help would be fantastic
Thanks very much
98 j-body sedan
My car does the same thing but only when the ac is on. Any ideas on that?
Should mention the symptoms my 220 has do not occur all the time......
vacume leak, is there an easy way to check for vacume leak?
Thanks
98 j-body sedan
4DRFIRE wrote:Should mention the symptoms my 220 has do not occur all the time......
vacume leak, is there an easy way to check for vacume leak?
Thanks
yep, boost leak test.
hook up silicone coupler with a cap that has an air line fitting in it, with 5 psi air pressure, listen for leaks, spray bottle with soapy water. very easy to locate issues.,
Michaelo wrote:My car does the same thing but only when the ac is on. Any ideas on that?
might also be a vacuum leak, or related to an erratic A/C pressure sensor reading. i have my wideband O2 sensor using my a/c pressure sensor as the input that i can monitor using HPTuners, so basically it makes the A/C pressure voltage fluctuate with the wideband reading so I can use the data in HPTuners to log my air-fuel ratio. if i accidentally turn on defrost or hit the a/c button (even though my a/c system is gone) the car will flip out and rev up and down trying to compensate for the fluctuation in its perceived reading of a/c voltage.
2001 Olds Alero (LD9)
650 whp / 543 ft-lb
@turboalero
Okay thanks I did a little more research into it and found out the connecting wire gets loose and won't get the right reading. Thanks
