Was wondering if this is a common problem with modified cars because my car does this all the time now. I get Check engine light flashing when i start the car it throws codes for multiple misfires. After the car has warmed the misfires dont happen anymore. It Does start normally if its warm outside but if cold then the happens every time.

 

pull a couple plugs and see if they are fouling.

 

I'll check that later tonight when I get home. Pulled them about 100miles ago and the plugs were fine. It's odd it reminds me of some older cars the require like a ten min warm up time before you drive them LOL. The strange part is if the outside temp is about or above 45ish then it doesn't happen its only happening when the temp get to near 40 or below.

 

ok. test the air intake temp sensor and your coolant temp sensor. see if your maf is dirty as well
http://www.shbox.com/1/4th_gen_tech2.html#ect

 

did you have your engine tuned after your mods? Certain mods will change the fuel or timing requirements of the engine's open loop profile. This goes away once the engine is in closed loop since it can get proper air fuel data from the additional sensors.

Massey

 

Waiting on the Tune guy to free up some time. it still has the orginal tune from all the problems i had. The tune it has now just has egr delete o2's removed and 10% less fuel.. Plugs clean sensors correct voltages.

 

I wish i new more about the program I bought I would do it myself. Jet tuner not to mention damn program wont run on my laptop with its currect setup.