Hi there,
Reading about some of the crank no fires, Trying to Narrow it down here, Compression Combustion Spark.
It's really cranking but no combustion and start, one thing I noticed, is that when I have the key just turned on in the ignition, not even trying to start it, i'm getting a super loud buzzing coming from the Fusebox area it sounds like. Could it be possible that theres a Blown fuse for something that's keeping it from starting properly?? I think I saw theres a fuse for the fuel pump I believe, wondering if that might be a place to start?

One thing I noticed yesterday was that - it took about 3 or 4 cycles of trying to crank, and it finally did start and get combustion. But I let it try for maybe 10-14 cycles to try and get it heated up a little bit and see if anything.. no avail.

 

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My guess, the RCM. Just intuition...


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So cranks but won't start. Have you checked for fuel pressure?
Can you hear the fuel pump run for 2 seconds when you first turn the key to the ON position?

 

Buzzing you’re hearing is probably a stuck relay, open RCM carefully take apart the relay that looks burnt and sand down to make clean contact

 

Actually, I wasn't quite sure what it was that I was hearing, but that sounds about right for a sound I hear when I turn the ignition on and comes from roughly where It would be.

 

I ordered a CPS off of ebay, will wait for that, and then go from there, and probably get a RCM next.

 

AH interesting point; I did go back in yesterday, checked fuses and put them back in, and the buzzing at least went away; Engine still not starting. I'll look at pulling the relay out tomorrow probably to look for any damage.

 

Yep, exactly. I don't have a pressure line to check that, but can hear what I believe should be the fuel pump when the key is in the On position. I even have smelled a little gas leading me to believe i am flooding the engine a bit, and the fuel pump is workin alright. Could be wrong, and that might not necessarily mean the pressure itself is okay. Maybe im going the wrong direction, but I saw a CPS on ebay for 40$ so I ordered that already. Think I need to probably get a Pressure line reader?

 

Is the Check Engine light on?
Have you check for fault codes? CPS may give P0335 fault. Make sure the replacement CPS is a BOSCH part.

 

No check engine light, and I only have a cheapo OBD II, no codes. Yep, the replacement is OEM from another Crossfire I believe