Technical question for EFI people.

Dark_5.0 · 10-06-2001, 12:53 PM

When I first start my car it smells like gas and my bbk equal length headers are rainbow colored from the heat. I know people with the same headers and they are not as discolored as mine.

I think that the gas smell is from a leaky injector that leaks into the cylinder when the car is off.

The header discoloration may be cause I am runing lean up top or cause all my car is used for is drag racing thus the headers have had a hard life.

Any suggestions

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88 mustang gt convertible bored to 306 BBk equal length headers, mac cold air fender kit, 3.73 FMS gears, Steeds Tri-ax shifter, Steeda underdrive pullies, Custom off road X-pipe, 2 chamber flow masters, cowl hood, nitto drag radials, ford racing clutch, 160* thermostat 16 degrees of timing electric fan off 94' t-bird jacobs electronics cap and wires. Edelbrock 1 1/2 inch drop springs. (Best E.T. 14.79@93mph @3000ft)

10-06-2001, 06:35 PM

First Question: What leads you to believe that your injector is leaking?

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91LX 331 S-Trim & 89GT NOS Stage II

PKRWUD · 10-07-2001, 04:35 AM

Pull your plugs an hour after you shut down, and look for a wet one.

Take care
~Chris

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Retired Moderator
MustangNet

My site: JimPorterRacing

RACECAR spelled backwards is RACECAR

HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!

jz_mustang50 · 10-07-2001, 11:01 PM

Sounds like an O2 sensor. Get a ford code reader and find out for sure. Mine was 25 bucks from Advanced. Your headers and h-pipe are getting too hot is what the color is telling you.

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Joe Zemaitis, Grand Rapids Michigan

1991 Mustang GT. Mods to date: 4.10 rear end, new POSI, aluminum driveshaft, AOD w/ shift kit, 2 1/2 off road h-pipe, 2 1/2 flowmasters and 2 1/2 tail pipes. Electric fan, Removed air pump and egr tube. Hotchkins upper and lower control arms. New energy suspension rear busings. Hoosier Quick Time Pro 27x10.5x15 and bolt on subframes soon to be welded. Everything else is STOCK. Totally stock ENGINE. 14.29@96 with 130k miles.

10-06-2001, 12:53 PM	#1
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Technical question for EFI people. When I first start my car it smells like gas and my bbk equal length headers are rainbow colored from the heat. I know people with the same headers and they are not as discolored as mine. I think that the gas smell is from a leaky injector that leaks into the cylinder when the car is off. The header discoloration may be cause I am runing lean up top or cause all my car is used for is drag racing thus the headers have had a hard life. Any suggestions ------------------ 88 mustang gt convertible bored to 306 BBk equal length headers, mac cold air fender kit, 3.73 FMS gears, Steeds Tri-ax shifter, Steeda underdrive pullies, Custom off road X-pipe, 2 chamber flow masters, cowl hood, nitto drag radials, ford racing clutch, 160* thermostat 16 degrees of timing electric fan off 94' t-bird jacobs electronics cap and wires. Edelbrock 1 1/2 inch drop springs. (Best E.T. 14.79@93mph @3000ft)

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10-06-2001, 06:35 PM	#2
Sparkplug Guest Posts: n/a	First Question: What leads you to believe that your injector is leaking? ------------------ 91LX 331 S-Trim & 89GT NOS Stage II

10-07-2001, 04:35 AM	#3
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Pull your plugs an hour after you shut down, and look for a wet one. Take care ~Chris ------------------ Retired Moderator MustangNet My site: JimPorterRacing RACECAR spelled backwards is RACECAR HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!

10-07-2001, 11:01 PM	#4
jz_mustang50 Registered Member Join Date: Sep 2001 Location: Grand Rapids, Michigan, USA Posts: 50	Sounds like an O2 sensor. Get a ford code reader and find out for sure. Mine was 25 bucks from Advanced. Your headers and h-pipe are getting too hot is what the color is telling you. ------------------ Joe Zemaitis, Grand Rapids Michigan 1991 Mustang GT. Mods to date: 4.10 rear end, new POSI, aluminum driveshaft, AOD w/ shift kit, 2 1/2 off road h-pipe, 2 1/2 flowmasters and 2 1/2 tail pipes. Electric fan, Removed air pump and egr tube. Hotchkins upper and lower control arms. New energy suspension rear busings. Hoosier Quick Time Pro 27x10.5x15 and bolt on subframes soon to be welded. Everything else is STOCK. Totally stock ENGINE. 14.29@96 with 130k miles.