I have a 01 ram 5.9l sport everything has been replaced on it less than a thousand miles on engine just out of nowhere it doesn't want to start then it starts and runs fine but smells very rich, on my way home dies at a light but now won't start unless holding the throttle down but when I let off the throttle won't stay running. Any ideas.

 

Coolant temp sensor, iac, or TPS. When was the last time the throttle body and IAC was cleaned?

 

it's all newer

 

What brand IAC? You can only use Mopar

 

All OEM

 

Is that an airgap manifold I see there?

 

Yeah air gap bigger throttle body fuel rails accel injectors harland sharp roller rockers it's not stock

 

Not even remotely.

I would suspect IAC. Are you getting any codes?

 

No codes ?

 

Start by cleaning the throttle body REALLY well. Pull it off, clean it up, put it back on, and see if anything is better. There is a DIY on the faq section for that I do believe.