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4th Gen Ram Tech2009 - 2018 Rams and the 2019 Ram Classic: This section is for TECHNICAL discussions only, that involve the 2009 - 2018 Rams and the 2019 Ram Classic. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
I have a 09 1500 4.7 ,hard to start, will not stay running multiple misfire showing on scanner, I have replaced new throttle body,all new coils,new map sensor,air temp sensor,new crank sensor.plugs are not that bad.and I don't know what to do, please help
I have good fuel pressure and good vacuum pressure
It just shows code p0300, compression is good leak down is in with range, that's what's weird in the Drive-Thru waiting when I go to place my order I shut the truck off for about 5 or 10 minutes go to start it back up and everything went to crap.
Some folks have had a bit of success with running another ground wire for the throttle body..... Aside from that, if you have a scanner that can read live data, see what the various sensors are saying, see if there are any pending codes.
Hhhmmm... Generally, putting the pedal on the floor puts the PCM into "Clear flood" mod, and it dials back dramatically on how much gas it gives the engine. Usual culprit for that is the engine coolant temp sensor.... (or the wiring for it) Do you have a scanner that can read live data?? See what the PCM thinks engine temp is, when it is stone cold.