Any one familiar with 1997 LT-1 engines?? - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
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post #1 of 3 (permalink) Old Nov 27th, 02, 07:41 PM Thread Starter
 
Join Date: Dec 2001
Location: Superior, NE, US
Posts: 4
I have a 97 camaro z28 since i bought the car under wide open throttle the car will not shift into second gear until 7300 RPM's...I have heard that the factory shift point under wide open throttle is supposed to be 5800 and the factory fuel cut-off is at 6200. I figured this would produce and error message when put on the computer so i took it to a mechanic and had him put it on his computer and take it out to run it, he said he got no error messages and his computer said it was shifting at 7300. Does a 97 have the "flashable" computer or is it still chip controlled for shift points?? I took the ECM out of the car to check for an aftermarket chip, everything looks stock there. Any help would be appreciated, i dont think the LT1 will last too long a 7300 RPM's. thanx in advance, Levi
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post #2 of 3 (permalink) Old Nov 28th, 02, 08:23 AM
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Join Date: May 2001
Location: Ashby,MN, USA
Posts: 8,305
sounds like someone has reprogrammed it. talk to whoever you got it from and see if they still have the programmer they used to do it, and get it from them. they can usually only be used on one car at a time anyways, so it is of no use to them. with the programmer, you should be able to lower your shift point to whatever you want.
or, you could go to a dealer and have them re-flash it to stock. those cars are mighty impressive in stock form, so you probably won't miss the 5 hp they got with the programmer.

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1971 Nova(looks like 69 camaro from underneath!)
355sb, vortec heads, HOT cam,T-10 tranny, 3.70 gears 16X8" IROC wheels. 12" Corvette brakes on the way.
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post #3 of 3 (permalink) Old Nov 28th, 02, 12:19 PM
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Bill
 
Join Date: Aug 1998
Location: Waldorf Md. USA
Posts: 3,323
Levi,
I am betting that the ecm is getting some type of false rpm signal. I doubt that a stock LT1 would even go to 7300 rpm without valve float given the heavy hydraulic roller lifters. If you have the nerve, and a good long stretch of safe road....take it up to the shift point with someone else watching the speedometer. Then when you get home, figure what rpm the engine should be turning at that speed with your tire size and rear end ratio etc. I think those motors get the rpm signal from the distributor which is the infamous "opti-junk" It is probably full of water like most of them are
Anyway, that would be my first plan of action....to verify the actual rpm.

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Bill Koustenis
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Waldorf Md
1971 Chevelle "Heavy Chevy" original owner
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