New Exhaust making 98 GT sluggish
 

I had a BBK H-pipe with cats tossed on a while ago. After about 500 miles, the check engine light pops on. Also, the car runs a little sluggish when I first take off. Has anyone else ran into this? Will MIL's solve both the check engine light and sluggishness from the get-go?

If you didn't change your O2 Sensors when you did this, you may want to look in to it. I have always bought 4 new senors when changing out the exhaust like that. I have a 98GT with that same H-Pipe and never had any problems with it. I only started having problems here after I did the TA/MAF/Underdrives at the same time. I have noticed that I have to run Texaco93 in my car, if I don't the MIL comes on. I know it sounds odd, but I have done it over and over.. and no matter what other type of grade/make gasoline I put in the car, it will always set off the computer about 5mi down the road. Only the Texaco93 will go tank after tank w/o MIL coming on... It's not just that one station, it's any station with Texaco93... I don't know what they do differently, but; it's the only gas my car will burn now and not complain about..... go figure... I think it's because my Mustang is powered by a Mac computer, not and Intel :-D hehe

Until I got the chip burned, my Bassani X w/cats would make my CEL come on. I never noticed any sluggishness though. Try switching up the 02 sensors and see what happens. You could always go with a custom chip too.

Thanks fellas, I'll try the O2's when I get back from Cali. Hey while I'm on here, does anyone know of a way to connect a laptop computer to a mustang to edit parameters? I'd like to drop the A/F ratio down from 14.7.1 to 12.1. Can I do this with the factory EEC V or do I have to get a different computer. Just curious...


SteveGT

BBK H-pipe w/ Two-Chamber Flowmasters
80mm C&L MAF
Cobra R 18x9.5 w/ P-Zero's