New Exhaust making 98 GT sluggish

SteveGT · 05-19-2002, 05:20 PM

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?

98SteedaGT · 05-21-2002, 04:04 PM

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

StoplightWarrior · 05-21-2002, 07:32 PM

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.

SteveGT · 05-22-2002, 08:51 AM

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

05-19-2002, 05:20 PM	#1
SteveGT Registered Member Join Date: May 2002 Location: St. Louis, MO Posts: 42	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?

05-21-2002, 04:04 PM	#2
98SteedaGT Registered Member Join Date: Jan 2002 Location: Texas Posts: 330	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 __________________ // 1998 GT-Steeda Conversion \\ -- Sold // Now own 2001 F-150 SuperCrew 5.4L \\

05-21-2002, 07:32 PM	#3
StoplightWarrior Registered Member Join Date: Jun 2000 Location: Nor-Cal Posts: 1,311	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. __________________ Black 2000 GT Auto V2-SQ, Full Steeda G-trac Suspension, Baer Brakes, Saleen Body Kit, Corbeau CR1s, Chrome Cobra R's, etc, etc... 341rwhp, 338 torque 1994 Cobra #4343 Bolt on's only... Cofounder of Raccoon Racing

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05-22-2002, 08:51 AM	#4
SteveGT Registered Member Join Date: May 2002 Location: St. Louis, MO Posts: 42	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