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Old 05-24-2006, 03:58 PM   #1
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Join Date: Jul 2005
Location: Windsor,Ontario
Posts: 218
Car: 1991 Firebird Formula WS6
Engine: LB9
Transmission: T5
Axle/Gears: 3.42's

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Failed E-test

So i went to get an E-test today and failed...the numbers

ASM2525 Test
HC ppm - Limit = 55 Reading = 115 Result = FAIL
CO% Limit = 0.31 Reading = 0.47 Result = FAIL
NO ppm - Limit = 612 Reading = 539 Result = PASS
RPM = 1538
Dilution = 14.1

Curb Idle Test
HC ppm - Limit = 200 Reading = 240 Result = FAIL
CO% Limit = 1.00 Reading = 0.58 Result = PASS
RPM = 769
Dilution = 13.6

Now from what i gather... im guess my high HC and CO% is due to running rich... i bumped up my fuel pressure about 4 PSI over stock... so would bringing it down lower these numbers into spec? the car also needs valve seals...but would that cause the HC's to go up because i thought the oil is only burned during start up and upon accel and deccel.....
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Mods: TB bypass,Ported Plenum, Custom CAI, Quarter in FPR,Advanced Timing,AC delete,Long Tube Headers,160 T-stat.

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Last edited by jethawk; 05-24-2006 at 04:23 PM.
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Old 05-24-2006, 04:07 PM   #2
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Join Date: Jul 2005
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Car: 1991 Firebird Formula WS6
Engine: LB9
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oh i forgot to add one fan was wired on the whole time...car was running around 180 degrees on my mechanical
gauge...

.....Air Filter is Clean.......Base Timing is 12 Degrees

Last edited by jethawk; 05-24-2006 at 04:22 PM.
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Old 05-24-2006, 06:47 PM   #3
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Location: Florida
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Car: '87 Trans-Am
Engine: LB9 (305 TPI)
Transmission: 700R4
Axle/Gears: 3.42 or 3.73..figuring it out still

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Well, the added fuel pressure might cause a slight rich running condition as well as if the fans are keeping the computer from going into closed loop due to it thinking its not warmed up yet. Try the fuel pressure first as that 4 psi may just enough to fail the test.
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Old 05-24-2006, 09:16 PM   #4
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in addtion to Creeping said, i would also say take 2 degrees of timing out.

make sure the cat is good & hot too.

what was the CO2 reading?
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Old 05-25-2006, 05:31 PM   #5
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well i went back earlier today with just adding 4 litres of methyl hydrate into 1/8th a tank of gas and came out with the following numbers

ASM2525 Test
.............Reading.........Limit...............Result
HC ppm......(83)...........(55).................FAIL
CO%.........(.40)..........(.31).................FAIL
NO ppm.....(546)..........(612)................PASS
RPM 1902
Dilution 14.2



Curb Idle
Reading Limit Result
HC ppm......(115)..........(200)..............PASS
CO%..........(.43)...........(1.0)..............PASS
RPM 790
Dilution 13.4



The car was nice and hot because i drove around for 30 min before hand to let the mixture in the fuel tank mix.... and during the test the car was around 220 degrees.... so after the test i went and began the task of lowering my fuel pressure back to stock.. and i set my timing to 4 degrees advanced instead of the 12 i had it at.... hopefully tomorrow i can pass and then put her back to how i had it...
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Old 05-26-2006, 11:06 AM   #6
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Join Date: Jul 2005
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Car: 1991 Firebird Formula WS6
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Axle/Gears: 3.42's

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ok this is starting to get a little frustrating.....so last night i turned the timing down to 4 degrees and lowered my fuel pressure back to stock... went in this morning for the test.... the car was running around 220 degrees during the test so it was nice and hot

Results

ASM2525
................Reading..........Limit...........Result
HC ppm.........(43)............(55)...........PASS
CO%............(.37)...........(.31)...........FAIL
NO ppm........(400)..........(612)...........PASS
RPM.............2225.............................VALID
Dilution.........14.1.............................VALID

Curb Idle
................Reading..........Limit.............Result
HC ppm.........(63)............(200).............PASS
CO%............(.48)............(1.0).............PASS
RPM.............1048................................VALID
Dilution.........13.3.................................VALID

so 0.06 on the damn CO% screwed me over! so back to paying full price for my next test..... since in ontario the first test is full price 35$ then if you fail the next 2 are at half price... then its back to full price for the 4th time!
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Old 05-26-2006, 12:42 PM   #7
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Car: 82 Berlinetta(2)/57 Bel Air
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Stock injectors? Ever been cleaned? Checked for leakage? How new is your O2 sensor?
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Old 05-26-2006, 04:11 PM   #8
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Car: 1991 Firebird Formula WS6
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the injectors are stock.... i ran injector cleaner through the system 3 months ago.... umm never been cheaked for leakage and im not sure of the age on the 02 sensor since i bought the car about a year ago.....
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Old 05-26-2006, 04:11 PM
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