Hard Start
Thread Starter
Heel & Toe
Joined: Jun 2020
Posts: 17
Likes: 0
From: Florida
Hard Start
I need some help with my LT-4. The car starts good when cold, but there are times after it has run for awhile that it gets hard to start, and after 2 or 3 tries it will being to run. I have replaced the fuel injectors, fuel pump & sending unit, Coil, Opti, spark plugs & wires, and even the IAC. Anyone out there had this problem, have any ideas of what to do, or where to look next?
Pro
Joined: Jan 2022
Posts: 689
Likes: 245
From: Spokane Wa.
A couple quick questions, do you have the factory service manual specific to your year model and do you have a SES light on the dash? The FSM is invaluable to help you fix whatever is going on. Along with the many many knowledgeable people on here. Being that you state you have an LT4 you have an OBD2 system that most any code reader can give you some idea what's going on.
Pro
Joined: Jan 2022
Posts: 689
Likes: 245
From: Spokane Wa.
Ok, that does present some issues that I'm not that qualified to help with. Did you just do the swap and started having these problems or did it run fine for a while and then started to act up? I'm not sure if the LT4 uses all the same sensors as a 94 LT1 so maybe someone else who has gone down this road will jump in and try to give you some help.
