96GT, will the H-pipe cause the warning light to come on?

96_4.6 · 08-05-2002, 04:58 PM

I am 90% sure it does and will this effect the way the car runs at all untill i get MIL eliminators? thanks

98SteedaGT · 08-06-2002, 02:49 PM

I ran a BBK H-Pipe w/cats for almost a year and never had a problem with the CEL coming on..... What finally set it off was the addition of the MAF/TA/Underdrive pulleys....

I can not say for sure whether it will or not.. If you get one w/o cats, it most likely will. However, you are 50/50 on the ones with cats... sometimes they set it off, sometimes they don't....

as I said, it didn't set off mine... but others on here put the same pipe on theirs, and it did trigger the CEL

97saleen · 08-06-2002, 09:53 PM

I put a MAC Pro-Chamber off road pipe on my car and it took about 20 miles for the check engine light to come on. I've also put off road pipes on 96-98 cars and the light came on everytime. If you get a h or x pipe w/ cats its a 50/50 chance the light will come on like someone already said. Get the MILs and you wont have any problems.

Titan · 08-06-2002, 11:03 PM

Is there anything you can do besides buying MIL's (what are those?) that would turn the light off?

Titan · 08-07-2002, 01:29 AM

Nevermind, upon further research I found the answer to my own question...

Quoted from www.mustangworld.com in their how-to section--

MAC (nor any other manufacturer) DOES NOT guarantee that you will NOT get a check engine light illumination. If the check engine light DOES come on you have a few choices: 1) Disconnect your battery overnight and reset your computer. 2) Re-program your ECC5 computer for the mod (with an ECC programmer). 3) Buy a computer chip that takes care of the problem in it's programming. or 4) Put variable resistors in-place where the sensors would normally go to "fool" the computer. None of these methods are guaranteed to work (but do in most cases). Re-programming your computer or buying a "chip" with the new "off-road" h-pipe programming is the best way to go, to ensure 100% proper engine performance (this is what we are doing).

96_4.6 · 08-10-2002, 07:55 PM

Well yea but if the check engine light comes on is that a bad thing??? Like will it hurt the car untillu buy a chip or whatever???

Titan · 08-10-2002, 09:09 PM

nah, it's just an eye sore/pain in the ***...I'm not sure, but i think it has something to do w/ the oxygen sensors. When you replace all four on the new exhaust, it messes w/ something, especially if you remove the cats. It doesn't do anything to your car, though...except that bothersome little light...

98SteedaGT · 08-10-2002, 11:09 PM

There's a very good chance that the car will convert to fail-safe mode while the CEL if on. It will only come on if a sensor value strays out of a pre-programmed range. The Ford Computer is designed to compensate for this by having a pre-formatted fail-safe mode that will allow the car to "limp" home with phantom values from the missing/faulty sensor readings..

-----Straight from Ford Tech Serv Man.

96_4.6 · 08-11-2002, 03:09 PM

SO does this hurt anything like performance or something, i didnt quite get that too much, thanks though

98SteedaGT · 08-11-2002, 07:57 PM

From what I've read out of the tech manuals, yes, it will hurt performance, as long as the light is on. The computer stays in fail-safe mode and drives on bare minimums on everything. I notice a huge difference on Accel and Shifting on mine when the light comes on, also the MPG sucks.

96_4.6 · 08-11-2002, 09:22 PM

well ****, i already bought an H-pipe and i'm gonna install it in a couple of days, so i'm shi* out of luck untill i get some mil elimintors which i dont even know where they go, great

98SteedaGT · 08-12-2002, 07:02 AM

Hey man, don't count your self out yet..... You may not even have a problem with them....Some cars complain, some don't, you'll just have to wait and see...

"""""I ran a BBK H-Pipe w/cats for almost a year and never had a problem with the CEL coming on..... What finally set it off was the addition of the MAF/TA/Underdrive pulleys.""""""

96_4.6 · 08-12-2002, 04:09 PM

Ya but I bought the one without cats and there gonna come on for sure, damn it damn it damn it, help

08-05-2002, 04:58 PM	#1
96_4.6 Registered Member Join Date: Jul 2002 Location: Michigan Posts: 417	96GT, will the H-pipe cause the warning light to come on? I am 90% sure it does and will this effect the way the car runs at all untill i get MIL eliminators? thanks __________________ 1996 Mustang GT, AODE -Trickflow Upper Plenum -BBK 70mm Throttlebody -02 PI Lower Intake -March Pulleys -BBK H-Pipe -2 Chamber Flowmaster mufflers -3000 RPM Stall -JLT CAI with special K&N -MSD Supercondutor wires -180 stat -FRPP 4:10's *FOR SALE C&L TRUE FLOW INLET PIPE WITH K&N* My Stang

08-06-2002, 02:49 PM	#2
98SteedaGT Registered Member Join Date: Jan 2002 Location: Texas Posts: 330	I ran a BBK H-Pipe w/cats for almost a year and never had a problem with the CEL coming on..... What finally set it off was the addition of the MAF/TA/Underdrive pulleys.... I can not say for sure whether it will or not.. If you get one w/o cats, it most likely will. However, you are 50/50 on the ones with cats... sometimes they set it off, sometimes they don't.... as I said, it didn't set off mine... but others on here put the same pipe on theirs, and it did trigger the CEL __________________ // 1998 GT-Steeda Conversion \\ -- Sold // Now own 2001 F-150 SuperCrew 5.4L \\

08-06-2002, 09:53 PM	#3
97saleen Registered Member Join Date: Apr 2002 Location: Virginia Posts: 4	I put a MAC Pro-Chamber off road pipe on my car and it took about 20 miles for the check engine light to come on. I've also put off road pipes on 96-98 cars and the light came on everytime. If you get a h or x pipe w/ cats its a 50/50 chance the light will come on like someone already said. Get the MILs and you wont have any problems. __________________ 97 Saleen S281 #207 Black on Black, leather 18inch Chrome Wheels 3.55s, MAC Pro Chamber Pipe Clear Corners, tinted windows Borla Exhaust Future: PI Heads, Saleen Series 2 Supercharger

08-06-2002, 11:03 PM	#4
Titan Registered Member Join Date: Jul 2002 Location: Atlanta Posts: 296	Is there anything you can do besides buying MIL's (what are those?) that would turn the light off? __________________ Current Sophomore -- Mechanical Engineering Black on Black 98' GT 5-Speed Mods = Stuff

08-07-2002, 01:29 AM	#5
Titan Registered Member Join Date: Jul 2002 Location: Atlanta Posts: 296	Nevermind, upon further research I found the answer to my own question... Quoted from www.mustangworld.com in their how-to section-- MAC (nor any other manufacturer) DOES NOT guarantee that you will NOT get a check engine light illumination. If the check engine light DOES come on you have a few choices: 1) Disconnect your battery overnight and reset your computer. 2) Re-program your ECC5 computer for the mod (with an ECC programmer). 3) Buy a computer chip that takes care of the problem in it's programming. or 4) Put variable resistors in-place where the sensors would normally go to "fool" the computer. None of these methods are guaranteed to work (but do in most cases). Re-programming your computer or buying a "chip" with the new "off-road" h-pipe programming is the best way to go, to ensure 100% proper engine performance (this is what we are doing). __________________ Current Sophomore -- Mechanical Engineering Black on Black 98' GT 5-Speed Mods = Stuff

08-10-2002, 07:55 PM	#6
96_4.6 Registered Member Join Date: Jul 2002 Location: Michigan Posts: 417	Well yea but if the check engine light comes on is that a bad thing??? Like will it hurt the car untillu buy a chip or whatever??? __________________ 1996 Mustang GT, AODE -Trickflow Upper Plenum -BBK 70mm Throttlebody -02 PI Lower Intake -March Pulleys -BBK H-Pipe -2 Chamber Flowmaster mufflers -3000 RPM Stall -JLT CAI with special K&N -MSD Supercondutor wires -180 stat -FRPP 4:10's *FOR SALE C&L TRUE FLOW INLET PIPE WITH K&N* My Stang

08-10-2002, 09:09 PM	#7
Titan Registered Member Join Date: Jul 2002 Location: Atlanta Posts: 296	nah, it's just an eye sore/pain in the ***...I'm not sure, but i think it has something to do w/ the oxygen sensors. When you replace all four on the new exhaust, it messes w/ something, especially if you remove the cats. It doesn't do anything to your car, though...except that bothersome little light... __________________ Current Sophomore -- Mechanical Engineering Black on Black 98' GT 5-Speed Mods = Stuff

08-10-2002, 11:09 PM	#8
98SteedaGT Registered Member Join Date: Jan 2002 Location: Texas Posts: 330	There's a very good chance that the car will convert to fail-safe mode while the CEL if on. It will only come on if a sensor value strays out of a pre-programmed range. The Ford Computer is designed to compensate for this by having a pre-formatted fail-safe mode that will allow the car to "limp" home with phantom values from the missing/faulty sensor readings.. -----Straight from Ford Tech Serv Man. __________________ // 1998 GT-Steeda Conversion \\ -- Sold // Now own 2001 F-150 SuperCrew 5.4L \\

08-11-2002, 03:09 PM	#9
96_4.6 Registered Member Join Date: Jul 2002 Location: Michigan Posts: 417	SO does this hurt anything like performance or something, i didnt quite get that too much, thanks though __________________ 1996 Mustang GT, AODE -Trickflow Upper Plenum -BBK 70mm Throttlebody -02 PI Lower Intake -March Pulleys -BBK H-Pipe -2 Chamber Flowmaster mufflers -3000 RPM Stall -JLT CAI with special K&N -MSD Supercondutor wires -180 stat -FRPP 4:10's *FOR SALE C&L TRUE FLOW INLET PIPE WITH K&N* My Stang

08-11-2002, 07:57 PM	#10
98SteedaGT Registered Member Join Date: Jan 2002 Location: Texas Posts: 330	From what I've read out of the tech manuals, yes, it will hurt performance, as long as the light is on. The computer stays in fail-safe mode and drives on bare minimums on everything. I notice a huge difference on Accel and Shifting on mine when the light comes on, also the MPG sucks. __________________ // 1998 GT-Steeda Conversion \\ -- Sold // Now own 2001 F-150 SuperCrew 5.4L \\

08-11-2002, 09:22 PM	#11
96_4.6 Registered Member Join Date: Jul 2002 Location: Michigan Posts: 417	well ***, i already bought an H-pipe and i'm gonna install it in a couple of days, so i'm shi out of luck untill i get some mil elimintors which i dont even know where they go, great __________________ 1996 Mustang GT, AODE -Trickflow Upper Plenum -BBK 70mm Throttlebody -02 PI Lower Intake -March Pulleys -BBK H-Pipe -2 Chamber Flowmaster mufflers -3000 RPM Stall -JLT CAI with special K&N -MSD Supercondutor wires -180 stat -FRPP 4:10's *FOR SALE C&L TRUE FLOW INLET PIPE WITH K&N* My Stang

08-12-2002, 07:02 AM	#12
98SteedaGT Registered Member Join Date: Jan 2002 Location: Texas Posts: 330	Hey man, don't count your self out yet..... You may not even have a problem with them....Some cars complain, some don't, you'll just have to wait and see... """""I ran a BBK H-Pipe w/cats for almost a year and never had a problem with the CEL coming on..... What finally set it off was the addition of the MAF/TA/Underdrive pulleys."""""" __________________ // 1998 GT-Steeda Conversion \\ -- Sold // Now own 2001 F-150 SuperCrew 5.4L \\

08-12-2002, 04:09 PM	#13
96_4.6 Registered Member Join Date: Jul 2002 Location: Michigan Posts: 417	Ya but I bought the one without cats and there gonna come on for sure, damn it damn it damn it, help __________________ 1996 Mustang GT, AODE -Trickflow Upper Plenum -BBK 70mm Throttlebody -02 PI Lower Intake -March Pulleys -BBK H-Pipe -2 Chamber Flowmaster mufflers -3000 RPM Stall -JLT CAI with special K&N -MSD Supercondutor wires -180 stat -FRPP 4:10's *FOR SALE C&L TRUE FLOW INLET PIPE WITH K&N* My Stang

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