I have a 94 Ram 1500 with the 5.2, just bought the truck. It idled high around 2000, and it chokes when you initially step on the gas from a stop. I replaced the IAC and that fixed the idle when in park but when in drive or reverse the idle just dumps down to 200, but it still chokes and sometimes stalls when accelerating from a stop. I replaced the O2 sensor as well thinking that might be it as well but still runs awful off stops. A lot of the sensors and components on this truck are new so I’m at a loss at where to turn next. Also sometimes while accelerating between 2000 and 4000 rpms the truck will shake pretty bad. No engine codes. Any help is appreciated

 

Getting any codes?

 

No codes

 

Check fuel pressure.

 

Fuel pressure is about 38-39 psi while idling normal in park and that same psi when it rough idles at about 2 - 300 rpms when put in drive

 

Does it run like crap right away? Or will it idle fine for a couple minutes, then start running like crap? Did you replace the crank sensor??

 

Crank sensor is brand new, it idles normal at about 900 rpms in park and if I step on the gas it’s an immediate throttle respond and normal reving but if I put it in drive or reverse, the idle drops to 2- 300 rpms and if I step on the gas it stalls or it chokes and really crawls until it eventually picks up and gets going. Once you’re moving it runs fine but off the stop it sounds like its fighting to stay running while initially accelerating.

 

This is what I got from the previous owner when I bought the truck 2-3 weeks ago. Crank sensor just replaced, cap, rotor, distributor pick up (cam) sensor all recently replaced. There Is an exhaust leak going into muffler. Trans is rebuilt from what I can see on receipts.

 

If the crank sensor wasn't Mopar that could bcould problem

 

The crank sensor only control injection timing and starting. The truck doesn’t misfire or faul. If I stomp the gas in park it revs up loud and proud like it should so I don’t think it could be fuel injection related