ok ive had this weird RPM issue going on for a while, it will jump between 500 and 1000 rpm during idle times its also having trouble responding to the throttle in 1st and sometimes second gear, I will have to punch the gas then engage or it will somewhat bog down. This only happens right after I start it after driving a little while it runs great.
Also when I start the car it immediatley wants to stall unless i give it a little gas. I cannot figure out what this problem is!!
I have a 1999 Mustang GT manual trans.
The car has new fuel pump, new IAC valve, all new vacuum lines. It will not pull ANY codes on diagnostic test. Sensors all passed data point test. No leaks anywhere. Spark plugs all check out, so does the throttle stop screw.
I tried unpugging the MAF sensor and starting it, idled good but wasnt able to drive it with it unplugged it would want to stall out like usual.
I am really at my whits end trying to figure it out. Some shops said it could be my cold air intake thats the problem but id multiple shops are stumped on what it is.
If anyone has had this problem before and knows how to fix it please help me!! thanks
Also when I start the car it immediatley wants to stall unless i give it a little gas. I cannot figure out what this problem is!!
I have a 1999 Mustang GT manual trans.
The car has new fuel pump, new IAC valve, all new vacuum lines. It will not pull ANY codes on diagnostic test. Sensors all passed data point test. No leaks anywhere. Spark plugs all check out, so does the throttle stop screw.
I tried unpugging the MAF sensor and starting it, idled good but wasnt able to drive it with it unplugged it would want to stall out like usual.
I am really at my whits end trying to figure it out. Some shops said it could be my cold air intake thats the problem but id multiple shops are stumped on what it is.
If anyone has had this problem before and knows how to fix it please help me!! thanks
