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Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!

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Old 11-16-2005, 05:45 PM   #1
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Join Date: Nov 2003
Location: santa barbara,ca
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Car: 1990 iroc z
Engine: LSX 376 Boosted
Transmission: 700r4 Elite
Axle/Gears: 12 bolt 3.42

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my car was rejected and it is completely stock. can u tell me what i need to pass.
HC..........ppm: 33 [failed] needs to be at 100

CO..........%: 5.12 [failed] needs to be at 1.0

CO2........10.0 [passed]

O2...........3.3 [passed]
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Old 11-16-2005, 08:27 PM   #2
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Car: 89' IROCZ
Engine: 5.7 L98
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What computer chip are you using? Looking at your sig. your car is not stock.
Last edited by CEP89; 11-16-2005 at 08:29 PM.
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Old 11-16-2005, 08:34 PM   #3
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Location: Yellowknife, NWT, Canada
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Car: 84 Z28
Engine: 357
Transmission: TH-350C
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Kind of a dumb question but did you at least to a half *** tune-up on the car?
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Old 11-17-2005, 12:56 AM   #4
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Car: 1985 Camaro RS
Engine: v-8 5.0 tbi
Transmission: 700r4

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Is your EGR valve working ok????? If not replace it. 9 out of 10 times it's the EGR valve. or it could be the o2 senser. My best bet though would be the EGR valve.
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Old 11-17-2005, 01:13 AM   #5
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Join Date: Nov 2003
Location: santa barbara,ca
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Car: 1990 iroc z
Engine: LSX 376 Boosted
Transmission: 700r4 Elite
Axle/Gears: 12 bolt 3.42

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i am talking about the car with 9k orignal miles not the white one that is all pumped up.
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Old 11-17-2005, 12:34 PM   #6
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Car: 91 RS
Engine: 305 Tbi (L03)
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I dont get exactly why they said your hc's failed. If your at 33 thats less than 100. Which is good. Maybe its 133?

In either case Id say your cats not working properly. Theres plenty of oxygen for the hc's and co to react with in the cat, but it seems that thats not happening.
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Old 11-17-2005, 01:49 PM   #7
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Car: 91 GTA, 91 Formula, 89 TTA
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Try ohming out the injectors to see if they are leaking.

Could also have one struggling to move any fuel.

Lean misfire will put fuel in the exhuast as well as easily as a driping injector.

Might prove wise to make sure everything ignition wise is ok and all vacuum lines are good as well.

later
Jeremy
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Old 11-17-2005, 01:49 PM
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