66grandsport

Just scanned my 93 383 lt1 with datamaster. RPM 775-800. Im seeing my o2 sensors reading (L)693-591-93mv (R)129-89-524in less than one second. Is this right. Actually o2 reading all over the place thoughout all rpms. BLM 160 at idle, 152-2000 rpm, 140-3000rpm.
157-4000 rpm. Map 57-58.3 at idle. 63.9 at 3000rpm,40.2 at4000rpm.
Are these numbers right. Computer pulling code 23 MAT problem but im getting stable temps from 168-172. Help

Thanks

Alvin

Sounds like the car is running lean.. It also sounds like you have a IAT failure. and your looking at ECT. IAT is on the right in datamaster around 2-3 items down from the bottom group.

If yo uwant you can send me the datalog and I can give an professional opinion.

email is Alvin at pcmforless.com

66grandsport

Hey Alvin

I put a new IAT on and code 23 is what I got from Datamaster. The car computer does pull any codes. This is a street and performance chip. The engine is in a 79 corvette is its a 1993 corvette engine 383 LT1 1.6 rockers, hot cam. So its running off camaro computer. It also starts like crap turning several times before it starts. File is on laptop not connected to this computer so I have to figure out how to move the file. Does this starting problem have to do with this lean condition.

Thanks

66grandsport

Sent you the file.

Thanks