this is with engine running and acceleration

B1S1-02V stays at 0
B1S2-02V stays at .04
B2S2-02% stays at .0
Command EGR stays at .000
my ECU voltage is 14.5 ish

The engine doesn’t sound to have a ping, just running rough...does this info help at all?

 

Doesn’t have a steady backfire just a rumbling noise. Was going to include video but can’t figure out how to load it.

 

I’m official Dumb Ass! I crossed 3 & 5 plug wires on the plug side. All is good now, glad I didn’t just try to start throwing a bunch of parts at it. Running a lot smoother all though the RPM’s have been sticking high occasionally hope it is just learning the new set up. Thanks for all the input.

 

Most excellent! Glad to help!

 

I have a 2007 jeep wrangler and im having the exact same problem misfire in #2 me and my father who is a mechanic have replaced the plugs wires and O2 sensors

 

what led you to this i have 2 p0300 codes it started with mu fuel pump going bad replaced it started it and the codes happened changed plugs amd wires still the same changed injectors still the same ive heard that driving it with the p0300 code is bad and ive test drobe it all of 2 miles i did think it would hurt it in that little of time but now people are telling me its got to be the cats now and ive had a bad smell ever since the fuel pump was going bad trying to get my jeep home the first time any info is appreciated

 

Common issue. I could not pass smog and took it to my mechanic who replaced the cat and solved the issue. I had about 30000 miles on it but it was mainly a hard core wheeler. I had another 2007 JKU that went 200,000 miles without any issues what so ever.

 

Been down that road now, replacing injectors myself and then against my better judgment I was a fool and took my 2008 JK into the dealership. DID NOT FIX THE F'N PROBLEM. After explaining what I'd done to tackle the misfire problem to the dealership service rep and mechanic, they did their typical shite of blaming nonmopar parts for the problem. I humored them and said sure, replace with MOPAR and when it doesn't fix it, you aren't charging me for it. We got through replacing the brand new NGK plugs, wires, new NAPA sourced coil, Napa crank position sensor cam position sensor, refurbished mopar injectors (tab running to $2700) and all the service rep could tell me was well it helped... a little, but it's still throwing the P0303 code. Mechanic claimed the injector was bad because it was hot (temperature hot). My retort to him was it's hot because it's getting a constant signal to remain open, so likely a harness issue; he waved me off. At that point,I blew a gasket and had a sit down with the actual service manager. Result: Mechanic reinstalled all my parts and I walked out the door with $400 and a week of my time less, but that was it. Still getting P0303 and check engine, but it triggers on start up. Jeep runs fine after first few seconds. Thinking it's either fuel pump/pressure related, TIPM or injector harness related although the inspection of the connectors and main harness yielded no identifiable shorts or breaks. After much searching to ID a quality mechanic who'll diagnose as opposed to parts swap, taking it into them later this week.