Last night, I was driving up a hill and 3/4 throttled and my car started sputtering. I looked down and noticed my boost would'nt go above 10/11psi... The day before, I had my car tuned by Vishnu and the car felt GREAT. But I was wondering if it made any difference that my car was tuned on a really hot day and I drove on a really cold night... I'd assume not really if at all. After that happened, I let off the gas, put the car in neutral, then tried it again and it boosted up to 23psi just fine. All I have is a TBE, works drop in filter, and a tune. I thought it was odd because that was the first time it happened. This was after about 20 min of driving too. Shiv said the ecu will do that if the coolant temps are'nt up to operating temps yet, but I dont think that applies to me, because my car was well warmed up.

 

hmm thats a little concerning, post in the vishnu forum for a direct answer from shiv, or call him. BTW what numbers did you put down?? I'm going to guess 310/310?

 

sounds like fouled spark plugs....even tho u just got a tune prolly something went wrong:S....i dont know just a statement...could be true because that was how my evo was after a ***ked up tune and i retuned it and it was all good again....but never the less good luck hope you find out the problem!

 

sounds like you need new plugs man

 

new plugs on a practically brand new car? what gives? excessive boost?

 

i dunno if it's the plugs, i drove around tonight and it did'nt re-occur... Maybe if it happens again this week i'll take my plugs out and check... I dyno'd 292awhp and I dont remember the torque... around 280 or 290 or so... it was a really hot day though...

 

So what was the problem?

 

I would get the tune checked, your ecu could have been picking up knock and pulling all sorts of timing.

My friends car is tuned with the stock ECU, when the shop was tuning his car it would do a dyno run of 432 WHP (Mustang Dyno), the very next pull on the dyno it would see around 200 WHP with the ECU pulling about 30 degrees of timing.