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Print in friendly format Send this term to a friend  TH700R4 / 4L60
Automatic Transmission - 4 Speed

1st Gear: 3.06
2nd Gear: 1.62
3rd Gear: 1.00
4th Gear: 0.70

Reverse: 2.29

- Used in production GM model...
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Re: LT1 Code 33

Subject: Re: LT1 Code 33
by toptechx6 on 2008/3/17 17:38:36

Quote:

TheAngelOfDeath wrote:
I have a problem that started Saturday afternoon after a 150 mile drive. Need some opinion's please. If your LT1 started running really rough. Missing badly especially at low RPM and you limped it home and got a code 33 "MAP Sensor". Would you order a new MAP sensor and try that first? I know what the FSM says but I do not have the means to test it the way the charts are laid out. Any and all help is greatly appreciated.


You should get a lot of responses to this post since it is impossible to give a "correct" reply. If we tell you no, that is the wrong way to do it we aren't being understanding to your circumstances.
If we agree with throwing parts at it we are giving you bad advice, which do you prefer?
Nearly anything that causes a misfire will result in lower than normal vacuum so the code may be a symptom, not the cause.
At the very least before buying any parts give the engine a good visual inspection with extra attention to the vacuum lines especially the one to the map sensor, can't hurt to look at the electrical connectors either, best of luck.
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