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rb25det neo running lean while car is warming up

Posted: Mon Jun 26, 2017 2:19 pm
by skyboy318
ok i dont know if this is normal but dont think so. my car runs great once warmed up but when i first start it, it runs supper lean around 16.0 to 17.8 i think iv seen it hit a 18 afr. it doesnt have a problem staying started but i was under the impression it if anything should run rich at first start. does anyone else have this problem and if there is a fix id greatly appreciate the help. iv tried upping the cells in the table called enrich (warm crank) and it did nothing.....

Re: rb25det neo running lean while car is warming up

Posted: Thu Jun 29, 2017 9:55 am
by Matt
It should not be doing that. Can you post the tune file?

Re: rb25det neo running lean while car is warming up

Posted: Thu Jun 29, 2017 2:26 pm
by skyboy318
this is the tune i use. its pretty much stock except fuel map. so i dont understand why its doing it.

Re: rb25det neo running lean while car is warming up

Posted: Tue Jul 04, 2017 11:40 am
by Matt
I've looked over the tuned. There are a few changes....

The file has been changed for Z32 MAF and some different injectors. What injectors are fitted? Where is the Z32 MAF from? Is it genuine?

K constant has changed from 340 to 550 to accommodate the MAF. Does your TP cursor operate within the 16 - 208 TP range that is on the fuel map?

Re: rb25det neo running lean while car is warming up

Posted: Sun Jul 09, 2017 3:59 pm
by skyboy318
the injectors are factory 380cc yes operates within scale. yes the z32 maf is real and works great. but runs lean when warming up. recently my coil packs went to crap on me so idk if that could of caused this issue or what. splitfires should be in this coming wednesday.

Re: rb25det neo running lean while car is warming up

Posted: Tue Jul 11, 2017 11:58 am
by Matt
You can adjust your "Enrich (Warm Crank)" table to add more fuel during cold start to stop it running lean