TBI runs rough at start up but fine after a min.

[deadlew]

Just swapped in a 355 from a 305, new chip, injectors, knock sensor, and esc. When I start it up it runs rough and misses. After a minute it runs great. If I shut it off and restart it same symptoms. Thanks for the input.

PaulC

 

[bigblock72]

What kind of work was done on the 350?

What injectors? which chip? if factory what are the numbers on it.

I assume you already quadruple checked all vacuum lines timing etc.

Sometimes just cracking the throttle plates open a turn or two will cure cold start issues, so you may want to give that a try.

 

[parker]

not to say the dumb answer but have you checked the plugs i have found tbis to be sentsitive to the plug condition

 

[deadlew]

I really haven't had a chance to really mess with it in a few days. The wife got a new job and I'm watching the kids till she gets home. I'm going to recheck all the vacuum lines and timing hopefully it is that easy. Thanks for the replies.

PaulC

 

[noJeepshere]

i always give the throttle a quick stab before i crank it in cold weather incase anything iced up. it seemed to help on my old pt cruiser in the cold