When its cold out engine doesn't want to stay running, but as it warms up it runs better. Ran my code scanner and got a po430 and300 codes. Ive been told that I need to remove my intake manifold and have it machined . Does this sound right? It has a 5.3 vortec
have the same problem?
Wednesday, March 6th, 2013 AT 6:15 AM
430 is a cat failure code.
300 is a random miss fire
expensive guess on the intake.
I would start with basics. Check fuel pressure as a start.