I have a gsr with the following
Ctr pistons, Gsr rods , crank
skunk2pro2 cam , valves springs retainers
65mm edelbrock tb
type r replica IM
Tuned on s300

Now the problem , the car before the tune used to start up flawlessly hot/ cold ,
I was told a bad TB so I replaced.
I Also went after , Idle air control valve , distributor cap , distributor rotor , TPS sensor , battery , alternator , battery terminals , spark plugs , spark plug wires. I have tired myself out and do not know what to do next. The car was tuned by a reputable tuner , but after the tune the car ran great Full throttle but everything before that is bleh.

Symptoms : when cold , I require tapping and or holding the gas pedal for about 20 seconds or more and will die if gas isnt applied , when warmed up , its an amazing car.

When hot: on startup , The car will fall on its face everytime without gas simply put.

Any ideas would be great , winter is near and its crazy cold starting this car. Thanks.

 

Were these symptoms not brought up to the tuner? It truthfully just sounds like a bad spot in the tune or a faulty IAT.

 

I had the same experience with my pro2's, but only hen it was really cold (around freezing temps). I used a block heater in the winter whenever I could to keep the coolant above 100 deg F. My cold enrichment put me at about 12:1 when it finally stabilizes around 30 deg F ambient. At room temps, you can use 13.5:1 to 14:1 for cold enrichment without misfiring.

 

Well I've drove it through 4 chicago winters on the old tune , and althought it was tough lf it got really cold it was tolerable. But after this tune its just dang tough.

I've been leaning towards getting a cold warm start tune.

 

sounds like an issue with the tune to me. maybe it was tuned during a warmer time of the year and cooler temps werent taken into account?

i had similar issues on my first motor build. took it back to the tuner, he adjusted temperature corrections or something along those lines, all was well after that.

 

Tune issue, add fuel to the cranking tables..

 

JarrettL: Mikeyspec tuned the car and noted that it was probably a bad TB, before the tune all was good, and after the tune he had to give it gas to start it aswell. He said Could be the TB so i changed it. NO luck.

Nice to read from you again ALL M0T0R , Yea ill look at them and see what i can dig up, Not very intuitive when it comes to messing My tune, I will do what i can, after all; upload option is sweet.