I have a 730 in my GTA, and I've been trying to tune it since I did an injector swap. For the first 30 minutes or so of driving, the car goes into closed loop like it should, and my BLMs are normal. After a while it starts to really screw up... I start getting wicked high BLMs and the car spends most of its time in open loop, I get SES's and the car stalls if it tries to idle. I got one error code in the process of all this, code 33 or "MAP high." I want to believe it is the MAP, but the MAP seems to be behaving normally when I tune. I think there is something wrong with one of the sensors, but I'll never figure out which one it is without your help. I have a copy of my datalog where it threw the DRC attached.


Here is a copy of a datalog from when it was running ok:

http://www.people.virginia.edu/~blr6k/vefckrpub2.uni


Here is a copy of the datalog after it started screwing up this is also the one where it threw the DRC:

http://www.people.virginia.edu/~blr6k/vefckrpub4.uni

 

R u using an emulator of some type?

Or an Ostrich? etc?

First, put the stock equivelant chip/memcal in and see if the problem exists.

More than likley it will go away. Than try one piece at a time to see where the problem lays.

Sounds like if u might have a bad pin or connection somewhere.

Code 33 tends to be common for me when I am having connectro or zif socket issues.

later
Jeremy

 

Indeed I am using an ostrich. I'll check out my socket connection today. I've also heard that it could be a bad ground or something. If you look at the O2 readings my O2 basically stops working for some reason. Whatever happens, updates will be posted tonight.

 

Problem solved. The heater valve vacuum line was unplugged, which made it difficult to tune. Thanks for the input.