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PLEASE HELP speed density car uses alot of fuel and misses??

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Old May 7, 2008 | 11:39 AM
  #1  
1dopehat's Avatar
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Joined: Jul 2007
Posts: 7
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From: wyoming
Car: 1990 iroc sunday driver
Engine: 350 tpi
Transmission: auto
Axle/Gears: stock g92 stuff
PLEASE HELP speed density car uses alot of fuel and misses??

ok so here is what i have done to the car in order from the time i got the car till now

june 05 i got the car home from cali ran but had it hauled home

about a month later it killed on me about 30 miles from home

i checked the ohms and found two bad injectors so i got a set of stock used injectors and replaced the two

the car ran awesome after i was done...

july 06 i got headers a y pipe and 3 inch tig welded stainless all the way back with spin tech muffler. of course when i got the headers i got rid of all the smog tubes and cats....but i am still running the stock o2 sensor. with accel header plugs with pefect gaps and neverseized threads...

the car runs very rich and misses i would think the reason it smells rich is because of the miss causing raw fuel to exit the exhaust... rather then burning in the engine

so once again i get new accel header plugs and moroso 8.5 mm wires a new cap and rotor...

still misses like crazy?? could it be confused because i am not running a heated o2 sensor?? and i also have a loose pigtail from the harness that plugged into the air injection control valve...that is the little box next to the ac that has hoses going to the smog tubes and smog pump..

i want my car to run great again i am very picky and i cant even stand to look at it knowing it has given me so much trouble PLEASE HELP give me ideas...im lost

Last edited by 1dopehat; May 7, 2008 at 11:44 AM.
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Old May 7, 2008 | 04:08 PM
  #2  
Saculia's Avatar
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Joined: Feb 2007
Posts: 730
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From: Minneapolis, MN
Car: currently a 91 G92.
Engine: 305TPI
Transmission: Borg Warner WC 5 speed
Axle/Gears: 3.42
Re: PLEASE HELP speed density car uses alot of fuel and misses??

Have you checked your ignition control module?
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