hey do you boosted guys throw the multiple engine missfire once in a while???? i just swaped out my stock injectors to #44 and it threw that code but i threw it a while back ago and cleared it and never came back??? is their anything related to fi apps?

 

what spark gap are you useing?

 

I got that code when my O2 sensor on Bank 1 went out. For me there was no clearing the code and then it worked. The truck was basically dead until the O2 was replaced. Limp-Home mode SUX.

Checking the plugs sounds like a really good idea. How much boost are you running and and when is the meth kicking in? I have the Snow kit as well and it starts at about 4PSI and I have the end range at 11PSI even though I don't go more than 10PSI of boost. I had too much meth without enough pressure while I was tuning it, that didn't work well at all. 4PSI was the magic number for me. Also, did you use the red end for the Snow kit? Or a different one? Could be too little meth at high pressure.

Ramble....ramble....

 

im still at stock boost my gap is at .32 and i9 dont have the meth hooked up!!!

 

Then I would be worried about going lean during boost. I installed a pump from Allen Nelson and one of his tunes now my A/F guage shows rich through most of the RPM curve.

I would also search through the NA group and see if they have run into the problem. Give us the code and or all the codes that got logged and we might get more people with ideas.

 

i had that with a crap pair of wires, even though they were $90... put new msd's in and all is well.

 

ok ill check it out the only reason is that it hardly ever goes on i will run it hard and it wont throw that code its only done it like twice.

 

I know the feeling. I got a P0440 twice in the last 3 months, but only while driving on the highway with less than a half tank of gas and boosting a little (less than 1psi). I figure it will get worse and I will be able to figure it out.

Be sure to make sure you are not running lean. Putting in a A/F guage is real easy on the new chevys. I used Summit Part number CYB-7009 for the guage and a pigtail adaptor so you don't have to splice anything: part number CEI-109047 (flat 4 wire O2 sensor)