Half the time it will crank, half the time it won't. Sometimes I can start it and it will idle rough for a few seconds and find idle. Sometimes it takes 3-4 times of turning it over before it will crank, all this happens when it's cold or has been running.

If I don't let it warm up for at least 15-20 minutes, I back out of the driveway and it bucks and revs, sometimes goes dead in reverse every now and then. Or when I get to the stop sign, it bucks and revs and goes dead either at the stop sign or turning at the stop sign.

Even when I let it warm up, it still surges slightly when coming to a stop and at sharp turns after a stop. Then I can go to the store or get some food, get in and have to turn it over 3-4 times.

-I haven't felt any power loss. It still pulls hard as hell at WOT.

-When I had it dyno-tuned last year, it never did any of this, the tune and drivability was perfect (Props to Allan!)

-I've checked for vaccum leaks, can't find anything.

-I've done the idle relearn twice and nothing.

-Fuel pump whines constantly (I'm thinking it's something to do with the pump)

Has anybody ever had this crap? Or know what it might could be? Because it seems to be getting slightly worse over time...

 

Pump, FP Regulator, Filter, Clogged cat (if any), O2 sensor.

Really hard to say unless you can get a code reader on it.

 

That's what sucks, it's not throwing any codes... Does that narrow it down any? I've been playing guessing games for months now and its driving me crazy!

 

When you say it bucks, does it feel like you are in a rodeo?

 

Yep. In a slower manner

 

From the cranking sometimes and not others. I say electrical. A connection problem somewhere. Maybe the switch which is known to go bad. Not throwing codes makes it difficult. I'd try and monitor voltage to the PCM.

 

I just went through something like this, and although I got a low fuel which had the dealer check the fuel pump and then suspect the controller, it looks like it was the connections on the board. We replaced all the connections in question and it seems to be fine for now. (crossing fingers). Intermittent connections are HELL! Keep up posted on your progress.

Hemi Killer .... great name!

 

mine did this when the alternator took a ****

 

Mine did this while going thru the tuning pains...rough idle, tough starts, stalls in reverse, or at stops. Wasn't as bad as urs, but didn't throw codes. Turned out to be combination of tranny tuning and fueling. U need to plug some software in and check all the tables...U sure u have enuf injector? U have a BAP or bigger in tank FP? Check the lock up on the tranny as well...R/

 

mine is currently doing the same thing, with the exception of stalling out and bucking. mine is definitly fuel pump related. i have found that if i turn the ignition to the on position and back two or three times the pump will prime and the truck will start. then it seems to run perfect. try that.