Hello all, I have an issue with the car when I go to start the car in the morning, its an 00 with a stg3+ kit and a unitronic chip. When I start the car it sounds like its firing on 2 or 3 cylinders and its pulling literly no vacuum maybe 5 psi if that until it start to warm up then slowly starts to sound normal. The only code its throwing is p1476 which is some aux emissions valve i believe.

 

This is a complete shot in the dark, but what kind of injectors are you running? I was reading yesterday that some injectors are horrible when it comes to idling, and I assume a cold start could be even worse. Has something to do with an incorrect spray pattern...

IDK, just trying to help...

 

There only 440's. I had 1000's in my integra and never had an issue with cold starts or idleing

 

It's not the size but the spray pattern itself. Some brands just cause a really rough idle. Like I said though, complete shot in the dark, and probably WAY off base...

 

Trouble code P1476 means: EVAP Emission Control LDP Circuit Malfunction/Insufficient Vacuum

Check for vacuum leaks...

 

Also make sure your spark plugs are good and are gapped correctly. You should be at .028. Make sure your fuel filter is clean. Vacuum leak is also likely, yes. But some of those other things can also cause a poor vacuum.

 

Hm Ill have to look. Everythings fine once it warms up. Pulls about 20psi vacuum

The plugs were the first thing I tried lol. If the motor is running like crap its not going to pull good vacuum. Once it sits there and idles for a few it goes back to normal.

Ill have to look into that. Maybe Ill email unitronic

 

Also someone said it may be the crankshaft senser