L98 running rich.
Thread Starter
Instructor
Joined: Aug 2007
Posts: 144
Likes: 4
From: Chandler Arizona
L98 running rich.
hey everyone,
i have a 1988 35th L98. the car got a new camshaft, TPIS mini-ram with the EGR kit. and the TPIS chip. the car runs really rich now. to the point where the cat glows. i thought the chip was it so i got TPIS to change it out for a new one. but it was still running rich. even with the stock tune it runs rich. when i bring the car's fuel rails down to 34 psi it still runs rich. i have tested the injectors and they are fine.
has anyone had this problem?
-David
cliff notes: after the TPIS mini-ram and cam the car runs rich. and it is not the computer or injectors.
i have a 1988 35th L98. the car got a new camshaft, TPIS mini-ram with the EGR kit. and the TPIS chip. the car runs really rich now. to the point where the cat glows. i thought the chip was it so i got TPIS to change it out for a new one. but it was still running rich. even with the stock tune it runs rich. when i bring the car's fuel rails down to 34 psi it still runs rich. i have tested the injectors and they are fine.
has anyone had this problem?
-David
cliff notes: after the TPIS mini-ram and cam the car runs rich. and it is not the computer or injectors.
Supporting Vendor
Joined: Mar 2008
Posts: 1,762
Likes: 14
From: Cumming Ga
hey everyone,
i have a 1988 35th L98. the car got a new camshaft, TPIS mini-ram with the EGR kit. and the TPIS chip. the car runs really rich now. to the point where the cat glows. i thought the chip was it so i got TPIS to change it out for a new one. but it was still running rich. even with the stock tune it runs rich. when i bring the car's fuel rails down to 34 psi it still runs rich. i have tested the injectors and they are fine.
has anyone had this problem?
-David
cliff notes: after the TPIS mini-ram and cam the car runs rich. and it is not the computer or injectors.
i have a 1988 35th L98. the car got a new camshaft, TPIS mini-ram with the EGR kit. and the TPIS chip. the car runs really rich now. to the point where the cat glows. i thought the chip was it so i got TPIS to change it out for a new one. but it was still running rich. even with the stock tune it runs rich. when i bring the car's fuel rails down to 34 psi it still runs rich. i have tested the injectors and they are fine.
has anyone had this problem?
-David
cliff notes: after the TPIS mini-ram and cam the car runs rich. and it is not the computer or injectors.
Safety Car
Joined: Oct 2008
Posts: 4,022
Likes: 30
From: Los Angeles CA
hey everyone,
i have a 1988 35th L98. the car got a new camshaft, TPIS mini-ram with the EGR kit. and the TPIS chip. the car runs really rich now. to the point where the cat glows. i thought the chip was it so i got TPIS to change it out for a new one. but it was still running rich. even with the stock tune it runs rich. when i bring the car's fuel rails down to 34 psi it still runs rich. i have tested the injectors and they are fine.
has anyone had this problem?
-David
cliff notes: after the TPIS mini-ram and cam the car runs rich. and it is not the computer or injectors.
i have a 1988 35th L98. the car got a new camshaft, TPIS mini-ram with the EGR kit. and the TPIS chip. the car runs really rich now. to the point where the cat glows. i thought the chip was it so i got TPIS to change it out for a new one. but it was still running rich. even with the stock tune it runs rich. when i bring the car's fuel rails down to 34 psi it still runs rich. i have tested the injectors and they are fine.
has anyone had this problem?
-David
cliff notes: after the TPIS mini-ram and cam the car runs rich. and it is not the computer or injectors.
Thread Starter
Instructor
Joined: Aug 2007
Posts: 144
Likes: 4
From: Chandler Arizona
How did you check the injectors? they check out to be about 11 ohms
do the cats glow in the dark or light, are the tailpipes sooty? they glow bright red in the light, and the tailpipes are black with soot.
do the cats glow in the dark or light, are the tailpipes sooty? they glow bright red in the light, and the tailpipes are black with soot.
Racer
Joined: Sep 2007
Posts: 351
Likes: 1
From: Marysville OH
Supporting Vendor
Joined: Mar 2008
Posts: 1,762
Likes: 14
From: Cumming Ga
hold on, the op has a 88 that engine used lucas disc injectors that do not have coil problems.. They are supposed to be 11.8 ohms. But checking the coils does not tell you if the injector is any good. The cats glowing are from a lean condition not rich. I would venture to say that you have some mechanically failing injectors. The o2 is picking this up and adding fuel to the injectors that are working, giving you the soot in the tail pipe. Imo after all the test you will find out the injectors are clogged. Do your injectors have a blue band around the neck above the plug, if you can scan the system the blm are probably pegged at 160 indicating a lean condition.
Burning Brakes
Joined: Nov 1999
Posts: 859
Likes: 17
From: Houston TX
I disagree with you there. If his headers/manifolds were glowing I would agree that it is a lean condition. If the cats are glowing, it is a rich condition because the catalytic converters are working overtime to burn up all of the fuel vapors.
I would stop running the car in this manner. If your cats are glowing, the heat transfer can go through the floor board and to other parts under the car. When I first installed my cam several years ago, my car ran so rich that the cats were glowing as well. While working on it and letting it idle in the driveway it set the carpet on both sides of the tunnel on fire inside the car and burned the wiring harness that runs along my transmission as well.
I would suggest calling TPIS and talking to them about your chip if you can't find any other reason for it to be dumping in that much fuel. You need to work with them on it if you bought everything from them though.
I would stop running the car in this manner. If your cats are glowing, the heat transfer can go through the floor board and to other parts under the car. When I first installed my cam several years ago, my car ran so rich that the cats were glowing as well. While working on it and letting it idle in the driveway it set the carpet on both sides of the tunnel on fire inside the car and burned the wiring harness that runs along my transmission as well.
I would suggest calling TPIS and talking to them about your chip if you can't find any other reason for it to be dumping in that much fuel. You need to work with them on it if you bought everything from them though.
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