Impulse nytro hard starting .

[xpx5]

I have the standard system with a head shim..700 miles on the sled and system .
It fires and dies takes several tries and eventually it will start and run and runs great .. I will start easily as long as there is some heat in the engine ..but if it sits for 4 or more hours .it don't wanna start?
Anyone have a idea whats wrong?

 

[BigFish BC]

possibly a leaking injector

 

[Zipperno]

Do you have the standalone ecu, or the the old piggyback box?

 

[evan3000]

mine has the standalone, and did the same thing. there was a map update that Paul did and mine fires right up. Try tweeking your fuel presure, and check you plugs as well, if they are fouled it will cause poor cold starts.

 

[xpx5]

it was a wire to the coolant sensor .. it must have gotten pulled out when i put my tunnel on .. i runs great now !
thanks for all the help ..