Trouble Codes
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Joined: Dec 2002
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From: Sheridan, WY
Car: 1986 Trans Am
Engine: LT1
Transmission: T56
Axle/Gears: 3.73
Trouble Codes
ok, i'm very pissed off at this shop called Oxnard Auto Clinic, so if any of you live in Ventura county do not goto this shop. I took my car in there to get a couple things fixed and now i have 4 trouble codes poping up!!!!!!!! Can any of you tell me whats causing these codes and how they can be fixed.
33. High voltage (low vacuum) at mass air flow sensor (or MAP sensor)
34. Low voltage (high vacuum) at mass air flow sensor (or MAP sensor)
36. Burn off at mass air flow sensor OR
Problem in transmission shift OR
Fault in direct ignition system OR
Missing pulses in electronic spark timing signal
43. Low voltage at electronic spark timing circuit
33. High voltage (low vacuum) at mass air flow sensor (or MAP sensor)
34. Low voltage (high vacuum) at mass air flow sensor (or MAP sensor)
36. Burn off at mass air flow sensor OR
Problem in transmission shift OR
Fault in direct ignition system OR
Missing pulses in electronic spark timing signal
43. Low voltage at electronic spark timing circuit
what things were you trying to get fixed?
Have you checked the connectors for the EST and the MAP? The EST may be disconnected, for a timing adjustment and they forgot to reconnect it. The MAP, not sure what the hell they'd be doing there unless you needed to pull the plenum. Check the electrical connector, and the MAP vacuum tube.
overheating? bad...fans not turning on? coolant switch disconnected? It could also be a messed up ECU.
Have you checked the connectors for the EST and the MAP? The EST may be disconnected, for a timing adjustment and they forgot to reconnect it. The MAP, not sure what the hell they'd be doing there unless you needed to pull the plenum. Check the electrical connector, and the MAP vacuum tube.
overheating? bad...fans not turning on? coolant switch disconnected? It could also be a messed up ECU.
Thread Starter
Member
iTrader: (3)
Joined: Dec 2002
Posts: 101
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From: Sheridan, WY
Car: 1986 Trans Am
Engine: LT1
Transmission: T56
Axle/Gears: 3.73
I did take the plenum out a while back, ported it, put in a new egr valve and a new fuel pressure regulator, but i connected everything back up.
they did have to put in a new distributor, new oil pressure sensor i belive, and a couple other sesnors that are slippin my mind, the fans spin.
they did have to put in a new distributor, new oil pressure sensor i belive, and a couple other sesnors that are slippin my mind, the fans spin.
Thread Starter
Member
iTrader: (3)
Joined: Dec 2002
Posts: 101
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From: Sheridan, WY
Car: 1986 Trans Am
Engine: LT1
Transmission: T56
Axle/Gears: 3.73
Check the electrical connector, and the MAP vacuum tube
where is this located ?
and also where is the EST located so i can reconnect that
and also where is the EST located so i can reconnect that
I don't know about TAs, but on camaros, the EST is near the passenger side strut mount.
The MAP has a vacuum tube on it's underside. It's a small tube that connects to a nipple on the plenum. Is the MAP electrical connector plugged in? The MAP is located on the passenger side rear of the plenum, on the side.
Once you got that all hooked up, unplug the negative battery cable for a minute or so, or remove the ECM fuse from the fuse box. That'll clear the codes, and start it up again.
I don't know what'll happen if the distributor is off a bit. Someone else may know.
The MAP has a vacuum tube on it's underside. It's a small tube that connects to a nipple on the plenum. Is the MAP electrical connector plugged in? The MAP is located on the passenger side rear of the plenum, on the side.
Once you got that all hooked up, unplug the negative battery cable for a minute or so, or remove the ECM fuse from the fuse box. That'll clear the codes, and start it up again.
I don't know what'll happen if the distributor is off a bit. Someone else may know.
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Thread Starter
Member
iTrader: (3)
Joined: Dec 2002
Posts: 101
Likes: 0
From: Sheridan, WY
Car: 1986 Trans Am
Engine: LT1
Transmission: T56
Axle/Gears: 3.73
well everything seems to be connected, the fan isnt turning on tho, i disconneted the neg side of the battery so i could clear the codes, so when i started the car the engine light wasnt on but my temp was rising fast so the car wasnt on for very long. how long would it have taken for the light to pop back on if there were new codes ?
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