KidWithACrayon
NAXJA Forum User
- Location
- Texas
We just installed a rebuilt 4.0. Engine is hard to start, but acts like for the first second of cranking that it wants to run but it won't. Occocianly it will go ahead and start, idle fine for about a minute. If you give it gas it back fires out the exhaust. The headers will also start glowing red. Any ideas?
Last edited: