Just starting to try to see what's wrong with my Z28.

Here are four datamaster files
(2 sitting at an idle and 2 on the road).

If anyone could take a look and let me know anything they see that looks irregular it would be greatly appreciated...

Brief history on car:
1994 Z28, 355 /w hotcam kit, edelbrock headers, tuned computer(so I was told)
Car has very ruff idle, runs very rich, and has a pretty nasty stumble.

I've only had the car two weeks and I hate to just start throwing parts at it.

Here are the links to my datamaster files. Right click and save as...


idle1
idle2
run1
run2

 

Your log shows you to be extreemly lean......the pcm is adding 20-25% more fuel across the board. Do you have a copy of your pcm file? Do you have Tunercat or lt1 Edit?

 

I do have tunercat...
Here is my current .bin

 

Man this forum moves fast...

ttt

 

26 view and only one reply...

Anyone want to take a shot at this one?

Help would be greatly appreciated.

Thanks...

 

You need to "export" the files and post them in ".csv" format. Unless you do that, only people with DataMaster can view them. I probably look at as many of these files as anyone, but I don't have DataMaster, so I can't help you with the ".uni" format.

Possible reason you aren't getting much help.

 

Sorry about that... Here are the csv files...

idle1
idle2
run1
run2

 

ttt

 

main problem i see is your car keeps going from open loop to closed loop for no apparent reason and your engine temp sensor is either busted or it has a bad connection.

 

it also appears you have a rather large vacuum leak since your idle vacuum is up around 17 inHG when it should be about 12-15. this would also explain why the BLMs are maxing out at 160.