hi guys, im having some trouble with my 96 gt 5 speed. i just replaced my catted h-pipe with an o/r h-pipe because my car was studdering and losing power randomly. i had a check engine light saying insufficient flow or cat below threshold (i forgot), anyway i figured my cats were clogged. after changing that out my car ran fine for about a week , then it started doing the same thing . itll run like a champ one day and then all of the sudden the idle surges , i lose power , kinda like its running rich, and the check engine comes on. i turn it off to plug my scanner in and bam , no codes . crank it back up and it runs fine. it does this almost everyday. the only thing the scanner shows is EGR monitor not ready. ive already checked for vacuum leaks, new plugs, cleaned MAF, new IAC, new EGR Valve. just recently when i turn the ignition on, the check engine light will flash rapidly, like the power is turning on and off really fast, and the fan comes on. is it a CTS ? TPS ? o2 sensor ? PCM ? i really dont want to dump any more cash untill i know what is the real source of the problem is. i know that it could be many different things wrong but im stuck at this point so any help is appreciated.
thanks,
thanks,