LT1 problems

z28 boy · #1 07-31-2005, 07:45 PM

Hey guys my friend has a problem with his 95 TA. One day after he put gas he went crusing and about 2 hrs later the car started to sputter and shut off. Well after 2 days he brought to me and a friend cause we were doing his tranny. well we got the tranny in but the car runs like shit. It sounds like it has a cam, u can hear it chug the gas and u can definately notice that it missfireing really badly. We drove it yesterday with the diagnostic scanner plugged in and it was sending some crazy signals. It was saying the desired idle was 3148rpm, and that the top speed we hit was 3,783.4 it said the coolant temp was 11,xxx. Im starting to get really mad cause we cant test and see if the tranny came out right cause the car just wont run. Anyone ever experienced this before? Oh and its not the gas cause its been refueled since.

Viper_Storm · #2 07-31-2005, 07:52 PM

Quote:

Originally Posted by z28 boy

Hey guys my friend has a problem with his 95 TA. One day after he put gas he went crusing and about 2 hrs later the car started to sputter and shut off. Well after 2 days he brought to me and a friend cause we were doing his tranny. well we got the tranny in but the car runs like shit. It sounds like it has a cam, u can hear it chug the gas and u can definately notice that it missfireing really badly. We drove it yesterday with the diagnostic scanner plugged in and it was sending some crazy signals. It was saying the desired idle was 3148rpm, and that the top speed we hit was 3,783.4 it said the coolant temp was 11,xxx. Im starting to get really mad cause we cant test and see if the tranny came out right cause the car just wont run. Anyone ever experienced this before? Oh and its not the gas cause its been refueled since.

bad ecm maybe?, lol, im just guesting.

Mr. Luos · #3 07-31-2005, 07:57 PM

Quote:

Originally Posted by Viper_Storm

bad ecm maybe?

That would be my first test.

Viper_Storm · #4 07-31-2005, 08:01 PM

Quote:

Originally Posted by Mr. Luos

That would be my first test.

yea, why else would it be shooting out numbers like that? it was just first thing that came to mind

FormulaLT1 · #5 07-31-2005, 08:01 PM

If all the PCM readings are off. Its either a burnt up ground or the PCM went bad. Also you were using a OBD 1 scanner right?. Cause the 95 has the obd 2 terminal but obd 1 pcm. If the pcm , you scans ok later on but still causing all the problem. It sounds like a bad opti. Good luck man.

Viper_Storm · #6 07-31-2005, 08:03 PM

whats a pcm?

FormulaLT1 · #7 07-31-2005, 08:05 PM

94 + GM F-body's used a computer controled tranny. The 4l60-e which means the vehicle computer now is responsible for tranny function so instead of being a "engine control module", its now a "powertrain control module".

Viper_Storm · #8 07-31-2005, 08:08 PM

thats just for automatics or manual to?

FormulaLT1 · #9 07-31-2005, 08:09 PM

Both, ever heard of cags?.

Both Manual and auto 94 + LT1 use the same computer, just the eprom is programmed differently.

Rally Sport · #10 07-31-2005, 08:12 PM

Use some STP, injector cleaner, if you will too.

Viper_Storm · #11 07-31-2005, 08:18 PM

Quote:

Originally Posted by FormulaLT1

Both, ever heard of cags?.

Both Manual and auto 94 + LT1 use the same computer, just the eprom is programmed differently.

nope, never heard of cags, first time acctually. so what do they control? btw im sorry for taking this thread a lil off topic.

FormulaLT1 · #12 07-31-2005, 08:23 PM

Cags (Computer Assisted Gear Selection) is a skip shift system programmed into 6 speed F-bodys and vettes PCM's. It doesn't allow you to use 2nd or 3rd gear under certain throttle conditions. It instead routes you to 4th, to allow for better fuel ecomony. Therefor controlling tranny function.

Viper_Storm · #13 07-31-2005, 08:32 PM

Quote:

Originally Posted by FormulaLT1

Cags is a skip shift system programmed into 6 speed F-bodys and vettes PCM's. It doesn't allow you to use 2nd or 3rd gear under certain throttle conditions. It instead routes you to 4th, to allow for better fuel ecomony. Therefor controlling tranny function.

oh, i have heard of skip shift before, ook, thanks for explaining this

Rally Sport · #14 07-31-2005, 09:05 PM

Would that interfere when you're trying to race or no?

FormulaLT1 · #15 07-31-2005, 09:08 PM

Under heavy throttle conditions it allows you to use 2nd and 3rd from what I hear but I have never raced using the t56 so that question would be answered better by Mr.Luos

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