I just put twin turbos in my car and when I start it up with the PCM edited to 45 lbs injectors (42lb SVO injectors) at idle it smokes like crazy. The engine is stock besides the twin turbos....

The smoke is coming from the exhaust which is dumping right behind the engine under the car... it really stings my eyes, im hoping its just fuel!!! Maybe I can get a definite answer, I don't see how it could be this rich at idle though!

http://kak.com/patch/Video/

 

sounds like its fuel to me...what fuel pressure regulator are you using and how old is it? i have had a diaphram tear in one and it ran so rich it would make your eyes water..not sure if maybe this could be an answer, or maybe if you forgot to connect a sensor somehwere along the way.. a knock sensor disconnected can make one run terribly rich as a safety default. where is your MAF sensor located? pressure side or not? need some more information on this one, but i thinik it will end up being something overlooked along the way of the install. how long have you been tuning with LT1 edit? sure you set the injector constants correctly? just some things to check, not second guessing any of your abiility as there no more information given to make a better guess.

keep us posted!

Chris

 

I set the injector constant to 45.58, when I get back I will scan it and post it here...

 

How are you handling boost fuel -- through a FMU? Do you have a fuel pressure gauge to verify correct fuel pressure?

The MAF is on the pressure side, which is a must with anything that blows excess boost to atmosphere... But, the vacuum looks WAY low for a stock motor. Is the idle higher than normal?

It definitely looks rich to me. If not, your plugs would look much different and your headers would have been glowing red from the little amount that you ran the car...

I assume you have O2 sensors in the exhaust already. A datamaster file would help too...


I had a similar problem with a carrol superfueller in which the injector driver fried and it was holding the 3 36lb/hr injectors in the throttle body wide open at all times. That wasn't pretty.

Good luck! Hopefully this helps a little...

 

The o2 sensors are in and I am running SVO 42 lb injectors (no FMU) Im still at work but I think its either the map sensor or the pressure regulator somehow bumping up the pressure...

 

http://kak.com/patch/Video/turbo.uni

Theres the scan, seems like its getting a lot more fuel than it needs.... I don't see why though...

 

This one you can see the PCM going all out trying to correct the extreme richness but failed after the blms locked all the way down to 108

http://kak.com/patch/Video/turooclosed.uni

 

I can't veiw your scan, what program did you scan it with (if it was datamaster I have it on my laptop and can check it later)

Are you sure that humphose from the MAF to the TB is tight? Did you change the injector offsets as well as the injector constant? Is it even drivable? If so chech the BLM's thruout the rpm range, maybe you will need to increase the injector constant to lean it out some, otherwise you can edit the MAF table. I've done them both with sucess. But seeing as it smokes like that right after the car starts up and is most likely in open loop you can eliminate the O2's as the problem. You have all the holes plugged off the Throttlebody?

Bill

 

Another thing you can try is throw the thing back together with the stock injectors. The motor is bone stock, so should run correctly with the stock injectors and program. If not start hunting down the prob! Put it back in a condition that You know it ran good. Maybe your new injector/s are bad or leaking. I'll check out your log later today and look at the injector pulsewidths, I'm just talking off the top of my head

Bill

 

Fixed, thanks guys... I changed the offsets and im set.