Ok so I just got my 02 gt last week and see I got a long way ahead of me.. A very long list of issues that need to be fixed.. But when I sit at idle with ac on my car revs up and down all the time.. I never had a car do that before.. Is it so posed to?
The idle will fluctuate, a little. Depending on when the a/c compressor is cycling off/on. Its a huge drain on the car, electrically and the engine.
Now, if its cycling a lot, meaning your rpm's are moving up and down frequently, its probably because you're low on freon (r-134a). Is the a/c blowing as cold as you would expect, or no?
Take it to a shop, have them do "a/c service". Meaning, charge it full and put a/c dye in it. Then drive the car. You may have a VERY small leak, and the charge could last for years. Could be opposite though, you may be leaking so rapidly that you'll run out of freon in a few days.
If a shop tries to do it any other way, ie, telling you to replace a condenser, or line, etc, dont listen to them. Theyre more than likely trying to rip you off. Charge it, put dye in it and drive it. And go from there.
could be something like the MAF sensor or IAC (idle bypass valve) not working right or needing cleaning. Air filter as well. Thats where to start then you can get into more troublesome items. You can also scan the car for any codes.. might have some but not showing a CEL code.
could be something like the MAF sensor or IAC (idle bypass valve) not working right or needing cleaning. Air filter as well. Thats where to start then you can get into more troublesome items. You can also scan the car for any codes.. might have some but not showing a CEL code.
my RPMs fluctuate with my A/C as well. i believe that is normal when the compressor kicks on and off. but as mentioned, i would def. have the A/C services if it is jumping rapidly.
It not like every single second I think it acting normal.. I cleaned the IAC and did alil better and gonna try to put freon in it shortly and see how works.. I def no for sure it not blowing as cold as should
Ok got the revving problem fixed.. It needed freon for sure then me and a frnd fixed the idle screw set a small amount higher and can def feel the difference.. It blows real cold, doesn't idle up and down, and sounds better.. Not got to bypass the O2, sensors fix abs problem, put 6 injectors in, put the new control arms on, and should be looking good
Ok got the revving problem fixed.. It needed freon for sure then me and a frnd fixed the idle screw set a small amount higher and can def feel the difference.. It blows real cold, doesn't idle up and down, and sounds better.. Not got to bypass the O2, sensors fix abs problem, put 6 injectors in, put the new control arms on, and should be looking good
Well because the car has been lowered and there no stock jack to be found I have to improvise to get under the car.. But it looks like 3" pipe from front to back.. I can't tell if the person that changed the exhaust even put new O2 sensors on it or not.. But most ppl I no just bypass them to get the code to erase.. Those sensors are a pain to maintain.. Especially if lowered
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Mustang Evolution Forum
2.1M posts
50.8K members
Since 2003
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, horsepower, modifications, troubleshooting, racing, and more!