First my car is like day and night with the weather if its say below 60* it runs awsome, if its like above that 70 or 80 it feels like I lost 50hp. Now I know cars make more power in cooler more dense air but this seems extreme. What do you think?

Second in cold weather about 30* +/- when I first start it the SES light flashes and it runs like $hit until its warm (can actually feel it misfiring). Is this possibly related to tuning. My mods aren't that


Posted in LT1 tech also

 

Have the codes pulled.

The tune might be a touch too lean or have a bit to much timing which would explain its temper.

 

I have Autotap and the only code is a Multiple random ctlinder misfire in history. Does not set the SES, but when its cold (below 40ish) it will flash the SES showing misfire unless I idle it up a little for a minute then it wont flash at all..

What kinda timing shud I look for? I have some stock timing tables but as far as my current tune no sure. I have the program I can email you but I can't veiw it to see whats in there.

 

Today I logged a normal start up w/Autotap. In the morning I'll log it again and compare them. map, iat, timing, maf, coolant temp as well as a couple others. If it don't make much since i'll post it and maybe you can help me.

On another note I'm thinking I have a vaccum leak thats causing it. Dunno, but I'm still exploring that now. Thanks and I'll post some results tomorrow

 

Try sending a email to Bryan programmer@Pcmforless.com He shoudl be able to look at the files for you and give you a recommendation