I cleared them with the SCT, so we'll see what pops back up. This is the order as appeared.

1388 - ASD control circuit

0301 - #1 misfire

0305 - #5 misfire

0303 - #3 misfire

0300 - Multi-cyl misfire

0455 - Large evap leak

I find it peculiar, all one bank. Evap leak used to be a small leak, now it's a large leak.

If I slap the throttle with the engine cold, it'll backfire through the intake and simply wont make RPM/power. All's fine with it warmed up.

Not sure what the 1388 ASD relay code is for/about.

I'm not real sure where to start?

I'm probably going to be putting the MSD on this weekend, so that may exacerbate any issues I have. A plug and dizzy check is definitely in order. Plugs aren't that old but need to be gapped 50-60 for the MSD, dizzy cap is new.

Really hoping I don't have a bum valve spring. The motor is seeing 5,000 RPM alot now that I'm racing it, and I have the HS 1.7 rockers, so the springs are getting a good workout. Same with the timing chain, hopefully the cam isn't loose and bouncing around. I could put a timing light on it, but there's no pointers that I can find to time off of?

 

to me it sounds like i would start at the large evap leak. that can cause most of those codes.