Car (evo 9) is having a really bad cold start and will sometime hesitate badly when i apply gas after changing gear. Could this be a bad map sensor? Still running on the stock map sensor or does anyone know what could be my problem?

 

Are you on tephra v7?

 

No dont think so

 

e85 or 91? Are you recirculating your DV or is it VTA? Did this just recently start happening? Are you only having driveability issue when the vehicle is cold?

 

The reason I ask is because while I was on v7 I had experienced some cold start stumbling until the car reached the o2 crossover temp. I never drive the car until the coolant has reached its operating temp. if I drive the car while cold it's horrible, it seems like the car is fighting me and not every happy to be moving lol

 

same thing is happening to me, it will start after like 4-5 tries but when i get off work and start it again the same **** happens, what did u do to solve it? Or did u never lol

 

Im on e85, Recirc DV, started happening 1 week after my car arrived in cali, and no it happens here and there sometimes cold and sometimes when ive been driving for awhile. Will sound like its about to die after the cold start while letting clutch go even if i gas it a little to help it not die but yea im lost

 

Heres a vid on the cold start

https://m.youtube.com/watch?v=mqUQOt9oVc4

 

Mine never had a problem like that. Mine would be after the car had started

 

Ahh i see but what did u do to fix the fight back? Lol

 

The car was retuned and no longer on v7. I believe it's a version of tephra v5.

The car no longer stumbles on cold start but I have noticed it's a little bit too rich until the o2 sensor kicks in

 

Hmm interesting well thanks anyways

 

Did you solve the issue as i have same symptoms on my car

 

 

thanks man appreciate the help👍👍