I have a 2005 Crossfire (.not SRT) that is driving me nuts. I have replaced mass airflow sensor, camshaft and crankshaft sensors, new fuel pump and new RCM. Changed the spark plugs and it simply will not stop misfiring. I did notice that when I moved the car today, the brakes had no assist. I had to literally stand on the pedal to get the car to stop. Related? For more back story, initially it just turned off and would not crank back. Replaced the likely suspects and still nothing. Just turning over but no fire. Wondered if it was getting fire, so I sprayed starter fluid in the intake, and thought I had ignited a bomb. After I went inside and changed underwear, I tried it again and it rain for a bit so I assumed it was getting fire. That's when I changed the fuel pump. Had bad relay on RCM so I replace the module and now I get 0300, 0302, 0303, 0304, and 0306 codes when it runs. Also the check engine lights comes on and then starts flashing. I am literally out of ideas. Live in a small town with no easy access to specialists. Any recommendations (not involving matches) would be most appreciated.

 

Have you checked the coil packs?

 

i have not. Suggestion on best way to test them?

 

Misfires can very often be the coil packs. Do some research but you need to basically check their resistance with a multimeter.

 

gotcha...yeah I have been reading forums, etc. trying to figure this out.. if the codes are random, could that still indicate a bad coil pack?

 

My 05 Graphite, at 95,000 miles, was throwing misfire codes like crazy. 12 plugs and 12 plug wires fixed it.
I've said it over and over again: If you need plugs, you need plug wires; they do NOT last forever.

In over 130,000 miles with three roadsters, Iv'e never changed a coil pack.

 

Mine ended up being coil packs. When I took them off most were cracked on the back side.

 

If you change the plugs and wires, always clean and inspect the coil packs. My Grandsons Crossfire would occasionally stumble at a stop light. We changed the plugs and wires and found a crack on the back of one of the coil packs. Always also clean thw head where the coil pack bolts as that is the ground connection.

 

Appreciate everyone’s input. Changed packs and wires and it still will start and immediately begin violently misfiring. Seriously am just totally frustrated.

 

And plugs?

 

Yep did the before the wires and packs

 

I completely understand I'm still chasing an intermated stall.

 

update... after switching everything out (coil packs, wires, plugs) still getting random misfire code and misfire code on 1,2,3. absolutely mind boggling. interesting thing though was it would run long enough for me to move it from its3 month resting place to another spot in the yard. when I hit the brakes, I had NO pedal. check fluids and all were fine. could this indicate vacuum issue that could cause both?

 

A vacuum leak would mean hard pedal, not no pedal. Try bleeding the brakes.

 

This might be a long shot, but once I had a short and the car would die at idle or in stop and go traffic. The idea is that at idle, the short bought the voltage down enough to interfere with the coil voltages or computer. You might want to check the battery draw, if it's above 50 mA, then you it can't hurt getting rid of it. My draw was over 2 Amps.
-Jerry

 

Quick question…is the inside of the throttle body elbow supposed to layered? Looks like a crack all the way down.

 

Can you do a photo?

 

 

sounds like a bad brake booster line/connection or a cracked intake manifold. start by checking the brake booster line (~ 1/2" od) black plastic hard line from intake manifold to booster on drivers side firewall.

 

Mine doesn't look like that.