SLOVED!!! ANY Ideas?? Spark / Ignition Cutting out

[FLG]

Another possible issue is a bad harmonic balancer that's separated causing the ring around that the cps uses to not spin with the engine causing issues with timing.

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[SpecM]

new dme? really?

I'm stumped

[ct3155]

Wow. I have the EXACT SAME problem. and... I've tried the exact same things to fix it. I used an OE BMW cps from the dealer.

Dude, I've never been able to not solve things on this car... I've had it six years now.. NEVER have i been this frustrated. Seems like the following should fix it and ive done it all.

New 173
Miller Maf
BRAND NEW under hood harness
New plugs / wires / cap / rotor
New coil
New Relays
New CPS

ITS ALL NEW!!!

[SpecM]

Wow. I have the EXACT SAME problem. and... I've tried the exact same things to fix it. I used an OE BMW cps from the dealer.

[ct3155]

Is the new sensor plastic or metal? I remember the ones I've had with were facet replacements and they were a black plastic.

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Also the new sensor I have is all black plastic. Just double checked. And it ohms out in spec.

[ct3155]

What's your guys opinion on bad ignition switch?? Would that cause the tach/engine to behave this way??

Or is it strictly just the loss of timing?

[Danny915]

He's dropping timing data won't be the afm and checked the link already

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I understand that was just saying that's what fixed my issue, it's impossible for it to be afm anyway, OP states he went with miller and maf setup,

[FLG]

i was having a similar issue with my car[solution for me was AFM], some people told me to check the fused line in the trunk. Its located under the carpet to the right wheel well, a litte farther into the car past the battery.

He's dropping timing data won't be the afm and checked the link already

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[Danny915]

i was having a similar issue with my car[solution for me was AFM], some people told me to check the fused line in the trunk. Its located under the carpet to the right wheel well, a litte farther into the car past the battery.

[FLG]

Is the new sensor plastic or metal? I remember the ones I've had with were facet replacements and they were a black plastic.

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[ct3155]

OHMS for sensor were 537 on the one i pulled from the car. The one that i installed this summer and rechecked today are 524!

So both of those seem good.

[ct3155]

Also just did the 12v LED to pin 18, 37, and ground. Drove the car around until it had its hiccup, NO FLASH!! No blink. no anything. Both LEDs remained perfectly solid. :(

Think it could have anything to do with the ignition switch / wires under dash??

[FLG]

Would Def just check the cps sensor. If you have a multi meter check what it ohms out at. Center pin and one of the outer ones will be nothing, other one should be like 520 plus or minus 20 ohms

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[ct3155]

Here is another quick update,

On start up, It will fire quickly but bring the check engine light on and spudder with spark cutting on and off... then light goes off, and runs normal.

Also it seems to be bump related... Like when you let off the gas quickly, or hit bumps on the highway.

So same problem but it exhibits it on start up / bumps now as well. meehhhhhhh!!!

[ct3155]

Yep! All connections have been checked up on super well when I put the new engine harness in two months ago. So I'm pretty sure all the under the hood connections are good. Gonna try the leds now!