Cold Start Tuning
12-02-2010, 11:36 AM
#1
TECH Resident
Thread Starter
iTrader: (2)
Join Date: Sep 2010
Location: Salisbury, NC
Posts: 909
Likes: 0
Received 0 Likes
on
0 Posts
Cold Start Tuning Hey Guys,
I have a cammed 98 z28, What I'm curious about is the open loop tune. I bought the car the way it is and since its gotten colder it's very obvious that the car was tuned in the summertime. It seems like the magic number is around 35*. If it gets around that cold overnight when I crank it it usually will stumble and fall on its face. When I try to crank it back up it hesitates to start(have to turn it over about ten times) then will cut up and chug terribly around 3 or 4 hundred rpm. I give it a little gas to keep it running and keep oil psi up and it runs with an obvious miss for about 5 or ten seconds then clears up and goes into its normal sounding warm up.
My question is: Is this going to hurt anything? I dont know enough about fuel injection to be the judge. The other question is, Is giving it throttle to keep it running like this harmful? Lastly If it is Bad for the motor is there a good way to tune for it or do I have to take it to a tuner and hope it gets cold enough for him to play with it when it acts up
TIA
I have a cammed 98 z28, What I'm curious about is the open loop tune. I bought the car the way it is and since its gotten colder it's very obvious that the car was tuned in the summertime. It seems like the magic number is around 35*. If it gets around that cold overnight when I crank it it usually will stumble and fall on its face. When I try to crank it back up it hesitates to start(have to turn it over about ten times) then will cut up and chug terribly around 3 or 4 hundred rpm. I give it a little gas to keep it running and keep oil psi up and it runs with an obvious miss for about 5 or ten seconds then clears up and goes into its normal sounding warm up.
My question is: Is this going to hurt anything? I dont know enough about fuel injection to be the judge. The other question is, Is giving it throttle to keep it running like this harmful? Lastly If it is Bad for the motor is there a good way to tune for it or do I have to take it to a tuner and hope it gets cold enough for him to play with it when it acts up
TIA
12-02-2010, 08:29 PM
#3
TECH Fanatic
Join Date: Jan 2010
Location: Euless Tx
Posts: 1,219
Likes: 0
Received 0 Likes
on
0 Posts
