Emissions Questions

91 gt 5.0 · April 3rd, 2008, 10:42 PM

Hi,
I bought my 5.0 about a month ago, had it tested and it failed for HydroCarbon emissions. From what I've read, this seems to be a problem of running rich or not burning all the fuel. I'm in the process of running injector cleaner through the engine, debating buying new plugs and wires. Wondering if besides these things, you guys have any other suggestions besides knowing someone in the business. I know I've got a slight leak b/w the header and h-pipe, could this be a major problem? ( I'm gunna fix it over the weekend regardless) E-85 isn't sold in CT so I can't use that. Thanks

e3sean · April 3rd, 2008, 11:07 PM

Seafoam

teal89 · April 4th, 2008, 01:53 AM

That or Zmax

93hatch · April 4th, 2008, 02:26 AM

i failed that stupid shit like 4 times till me and sean put an h pipe with 4 cats on it and i passed with flying colors, do you have stupid highflow cats or somethin?

JBIGBOOTSY · April 4th, 2008, 06:17 AM

Old cats are prolly the culprit. They loose there effectiveness over the life of the cat.

Black Five 0h · April 4th, 2008, 09:43 AM

i dont even know how i passed emissions im in ct too and my check engine light has always been on...o well

Haggis13 · April 4th, 2008, 10:38 AM

I had to retard timing, and add methyl hydrate to my gas tank. Exhaust smelt like vodka - passed with flying colours.

92hatchback · April 4th, 2008, 10:40 AM

Move to michigan... no emissions tests

teal89 · April 5th, 2008, 03:39 PM

I'm still trying to debate if I want to remove my lower or upper cats. I'm losing to much power. I live in a non-emissions area so the basic inspection is lights and horn and wipers... brakes too and that's it. I'm tempted to buy some headers and H pipe myself and say fuck it.

baine21225 · April 5th, 2008, 05:13 PM

maybe new cats, plugs/wires etc may help a little......run the piss out of it on the way there also

April 3rd, 2008, 10:42 PM	#1
91 gt 5.0 Regular Join Date: Feb 2008 Location: CT Posts: 131 iTrader: 0 reviews	Emissions Questions Hi, I bought my 5.0 about a month ago, had it tested and it failed for HydroCarbon emissions. From what I've read, this seems to be a problem of running rich or not burning all the fuel. I'm in the process of running injector cleaner through the engine, debating buying new plugs and wires. Wondering if besides these things, you guys have any other suggestions besides knowing someone in the business. I know I've got a slight leak b/w the header and h-pipe, could this be a major problem? ( I'm gunna fix it over the weekend regardless) E-85 isn't sold in CT so I can't use that. Thanks

April 3rd, 2008, 11:07 PM	#2
e3sean I Post Entirely Way Too Much 1988 lx 9.68@142 Join Date: Nov 2007 Location: goldsboro NC Posts: 5,609 iTrader: 0 reviews	Seafoam __________________

April 4th, 2008, 01:53 AM	#3
teal89 Enthusiast 89 Mustang Lx Join Date: Feb 2008 Location: Rockwall, Texas Posts: 527 iTrader: 0 reviews	That or Zmax __________________ 94-95 306, B-Cam, Off-brand BBK Like Headers, H-Pipe, 3.73's, Nitrous Wet Shot 175 Shot

April 4th, 2008, 02:26 AM	#4
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	i failed that stupid shit like 4 times till me and sean put an h pipe with 4 cats on it and i passed with flying colors, do you have stupid highflow cats or somethin? __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

April 4th, 2008, 09:43 AM	#6
Black Five 0h Enthusiast 02 Mustang GT Cant wait to find out Join Date: Mar 2007 Location: Connecticut Posts: 567 iTrader: 1 reviews	i dont even know how i passed emissions im in ct too and my check engine light has always been on...o well __________________ 02 Mustang GT "We build it up, run it hard, we know whats breaking and we enjoy it breaking, we dump money into it, we re-build it stronger, run it harder in anticipation of it breaking again. We are sick individuals."

April 4th, 2008, 06:17 AM	#5
JBIGBOOTSY MM Fanatic 1990 LX hatch Join Date: Aug 2006 Location: Hobart Indiana Posts: 4,391 iTrader: 0 reviews	Old cats are prolly the culprit. They loose there effectiveness over the life of the cat.

April 4th, 2008, 10:38 AM	#7
Haggis13 Enthusiast 1993 Mustang GT Join Date: Sep 2006 Location: Ottawa, Ontario, Canada Posts: 593 iTrader: 0 reviews	I had to retard timing, and add methyl hydrate to my gas tank. Exhaust smelt like vodka - passed with flying colours. __________________ Bart 93 Black on Black GT Kenne Bell S/C GIVE 'ER!

April 4th, 2008, 10:40 AM	#8
92hatchback Regular Join Date: Nov 2007 Location: macomb Posts: 144 iTrader: 0 reviews	Move to michigan... no emissions tests

April 5th, 2008, 03:39 PM	#9
teal89 Enthusiast 89 Mustang Lx Join Date: Feb 2008 Location: Rockwall, Texas Posts: 527 iTrader: 0 reviews	I'm still trying to debate if I want to remove my lower or upper cats. I'm losing to much power. I live in a non-emissions area so the basic inspection is lights and horn and wipers... brakes too and that's it. I'm tempted to buy some headers and H pipe myself and say fuck it. __________________ 94-95 306, B-Cam, Off-brand BBK Like Headers, H-Pipe, 3.73's, Nitrous Wet Shot 175 Shot

April 5th, 2008, 05:13 PM	#10
baine21225 MM Fanatic Join Date: Jun 2007 Location: Baltimore, MD Posts: 4,349 iTrader: 1 reviews	maybe new cats, plugs/wires etc may help a little......run the piss out of it on the way there also

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