chairmnofthboard

I got my car tuned the other day and it runs great once it warms up, but I get a bad misfire at first start of the day or after it's been sitting for a while. It take about 20 minutes to warm up enough (or whatever it needs to do) to get it to run normal.

I know EMS have cold start problems, but to have to wait 15-20 minutes seems abnormal.

What do you guys think?

hokies2000

Seems very unusual to me. Mine doesn't have any cold startup problems. My guess is your warm up enrichment table is off.

dragtek

my car does the same thing. however, it only misfires sometimes not everytime u start it like yours.

John_Z

Cold start tables need adjustment. Take it back to the tuner.

Spec_Ops2087

^^ Correct, this is, yet again, a tuning problem not an issue with the ems.


FWIW, my car warms up in the dead of winter in under 5 minutes and never has misfiring during that time.

chairmnofthboard

ok so something is wrong. I get nothing but misfire. I pulled the plugs and they all look good, no flooding or anything, that's what made me think it was the tuning or EMS.

Sweet, so this is a normal issue with bad cold start tables, thanks guys.

Turbo-Mafia.com

Yes, the cold start tune needs some more work. To get it perfect is going to take some work on the tuners end. Probably 1-3 days of cold start tuning

chairmnofthboard

oh oh, not an option, I am an hour away from the tuner. lol

smirfs2k05

I told your ass this last night that it was your cold start need to finish your damn tuning

chairmnofthboard

but these people are professionals!