Quote:Originally posted by r3lic76:
code 81 comes up right when i start the test, which i think is memory code
i plugged the stock BCS back in and i still get a check engine light
Again, which test?? Engine running or engine off??
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Jeff Korn
88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 20 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 00 Windstar (wifes vehicle)
Interesting...
I just pulled a Code 81 on the KOEO test on my TC ???
Hummmm...
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Dan Eaves
88TC 5spd, Crower 5.5" Sportsman Rods, Short Wiseco Pistons bored .030" Over, Ported Head with Polished Combustion Chambers, Gutted & Polished Upper, Ported & Polished Lower, Polished T/B, Ported E6, SVO T3 .63AR Turbo, Bosch Bypass Valve, 3" DP w/No Cat, 2 1/2" DynoMax single cat back w/DynoMax Super Turbo Muffler, RR Cam, K&N in Fenderwell, Gillis Boost Valve, Centerforce I Clutch, Removed A/C, Polished Wheels, Polished Valve Cover, Polished Crank and W/P Pulleys, Walbro 255LPH HP Pump, Kirban Adj FPR, and the DAMN Heater Core is new too !
NATO MEMBER (Vice Chairman...if it's a vice...I deal with it)
i pulled 81 when engine is off
i passed smog, and the light doesn't come on if the car is sitting there idling (like at a smog station)
if im going 80 on the freeway, it will go off and come back on in a few seconds
Quote:Originally posted by r3lic76:
i pulled 81 when engine is off
i passed smog, and the light doesn't come on if the car is sitting there idling (like at a smog station)
if im going 80 on the freeway, it will go off and come back on in a few seconds
Code 81 can only exist in the KOEO form.
Code 81 on the TC is the boost control circuit. The boost solenoid and circuit should be checked.
If i remember correctly, there is a slim chance it could also be a faulty EEC, VREF issue, or a TPS issue.
i'll email you the section on how to troubleshoot code 81.
JT
KOEO I just got an 81, and I know what did it. There are vac lines on the turbo that lead to some sort of weird solenoid or something (maybe BCS? I dunno.) that is by the harness for the VAM. I removed it from the car because the vac lines were tough to get off of it.
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Ryan Harris
1988 TC, 5 speed, all options including sunroof
1987 3.8L V6, C4, 160K miles, no options (winter car, when it works)
RIP 1987 TC, "Built" A4LD, 119K miles, all options except sunroof
My Audio Mixes
Yes, that is the BCS. And if its not electrically hooked up, it will generate that code 81.
If you dont want to see the code 81, wire a 100 ohm 1 Watt resistor across the BCS connector (harness side, of course). This will fool the EEC into thinking the BCS is still there.
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Jeff Korn
88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 21 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 04 Taurus Duratec (wifes car)