[harkes]

Hey

Got a misfire, swapped things around and it is a coil. Put in 6 of these dirt cheap coils so apparently one tapped out after just 3500km

https://item.taobao.com/item.htm?_u=...d=596667348131

I'll let you know how long before the next has had enough.

Price / coil: USD16.2

[Eschmacher]

To be fair, I bought an entire kit from fcp euro that were legitimate, full-price Delphi - one failed in a month.

Replaced with the newer Eldor model and no issues since.

[ZM2]

Originally Posted by Eschmacher

To be fair, I bought an entire kit from fcp euro that were legitimate, full-price Delphi - one failed in a month.

Replaced with the newer Eldor model and no issues since.

Same. My FCP Euro Eldor’s have been doing great thru a ridiculous number (hundreds) of pulls and a few dyno sessions while working on the Stg 2+ E30 beta maps and now the Stg 2+ E30 OTS @ 440+ whp.

[harkes]

Got two new. Looks legit One for the trunk to join the obligatory quart of oil

[harkes]

Originally Posted by ZM2

Same. My FCP Euro Eldor’s have been doing great thru a ridiculous number (hundreds) of pulls and a few dyno sessions while working on the Stg 2+ E30 beta maps and now the Stg 2+ E30 OTS @ 440+ whp.

I'd probably go with the Eldors also, but cannot seem to find them. Correct that these are not officially for the N55 but for some Mini Coopers and Rolls Royces?

[ZM2]

Originally Posted by harkes

I'd probably go with the Eldors also, but cannot seem to find them. Correct that these are not officially for the N55 but for some Mini Coopers and Rolls Royces?

BMW Ignition Coil - Part Number 12-13-8-643-360 or 12138657273
My understanding is BMW switched from Delphi to Eldor for its new engines & coils, and this fits many engines including the N55.

FCP Euro sells an OE version (same part w/o the BMW stamp) for $32.

[designatedposter]

Originally Posted by ZM2

Same. My FCP Euro Eldor’s have been doing great thru a ridiculous number (hundreds) of pulls and a few dyno sessions while working on the Stg 2+ E30 beta maps and now the Stg 2+ E30 OTS @ 440+ whp.

what drove you to replace the original ones?

[ZM2]

Originally Posted by designatedposter

what drove you to replace the original ones?

I was having intermittent misfires issues under load that went away when I changed coils and went back to stock gap on my NGK’s.

Was it the plugs or coils, IDK, but my coils had a lot of hard track driving on them so went ahead and changed them.

[435gc]

Will those eldors fit a f36? FCP says they wont. Which confuses me because they say they will fit an x5. Thought x5 and f36 had same motor.

Zm2, you are running them and you have n55 right?

[ZM2]

Originally Posted by 435gc

Will those eldors fit a f36? FCP says they wont. Which confuses me because they say they will fit an x5. Thought x5 and f36 had same motor.

Their suggested fitment list isn’t complete, so IDK for sure. I gave them a shot bc there were lots of N55 guys in the product reviews saying they worked for their cars.

[435gc]

Thanks.

I had a couple misfires today while doing a pull getting my ps2 dialed in. Plugs are less than 5k miles, coil packs are 67k miles. Never an issue with the stock turbo at 22psi. Now misfire with ps2 at 22psi.

Dont know if increased hp would exacerbate an old coil? Figure I'd start by swapping in new ones.

Just ordered the eldors. Will report back on fitment.

[ZM2]

Originally Posted by 435gc

Thanks.

I had a couple misfires today while doing a pull getting my ps2 dialed in. Plugs are less than 5k miles, coil packs are 67k miles. Never an issue with the stock turbo at 22psi. Now misfire with ps2 at 21psi.

Dont know if increased hp would exacerbate an old coil? Figure I'd start by swapping in new ones.

Just ordered the eldors. Will report back on fitment.

What’s your plug gap? ~0.020 was giving me issues. Going back to 0.026 and/or the coils made it go away.

To compare I’m not at your power level, but I’m running BM3 Stg 2+ E30 (20.6psi target) w/ Dinan turbo (442whp on a Dynojet).

[435gc]

I'm not 100% but they are either .020 or .022.

What issues were you having with the .020 gap? Are you sure it was the gap if you changed the coils at the same time?

I never had a misfire before the ps2 went in. I had always read that the narrower gap helped prevent misfires with higher hp/higher boost applications. Seemed to hold true until today.

What gap are you running harkes?

[thejeremyman9]

Originally Posted by 435gc

I'm not 100% but they are either .020 or .022.

What issues were you having with the .020 gap? Are you sure it was the gap if you changed the coils at the same time?

I never had a misfire before the ps2 went in. I had always read that the narrower gap helped prevent misfires with higher hp/higher boost applications. Seemed to hold true until today.

What gap are you running harkes?

The general rule of thumb is to decrease gap with higher boost/cyl pressure but its not a one size fits all. There are other variables like the health of your ignition system, fuel you are running, AFRs, etc. For example there are some people that have issues going to the NGKs down to 0.022 but then put stocks back in with 0.03-0.032 and the problems go away, with no other variables changed.

If your misfires just started i would check for a code/shadow code for one cyl and see if you can swap a coil to see if it follows. If no codes and coils doesnt solve it, i would try a bigger gap or OEM plugs with OEM gap.

[ZM2]

I was getting little misfires under WOT when doing logs or dyno runs.

The eldor coils helped make it happen less often, but it would still appear every now and then and was annoying.

A new set of NGK’s gapped wider to 0.026” solved it. We don’t think it was a single plug bc the little misfires would happen on different cylinders until the plugs & gap were changed.

[435gc]

What do you mean by little misfires?

I got drive train malfunction with limp mode. Codes showed multiple misfires and injection switched off one of the cylinders.

[ZM2]

Originally Posted by 435gc

What do you mean by little misfires?

I got drive train malfunction with limp mode. Codes showed multiple misfires and injection switched off one of the cylinders.

That’s a much bigger issue than mine. Mine were little hiccups in the power under WOT, no codes, no limp mode.

Hopefully the coils fix it. Could as be an issue with the tune?

[435gc]

Here is a log when the issue occurred.

https://datazap.me/u/435gc/ps2?log=0&data=1-3-4-10

I typically need to do 3rd gear pulls do to lack of location to get up to 4th gear speeds.

Car was feeling great, pulling hard. I shift to 4th wait a second or two and take my foot off the gas and start to upshift and brake. That's when the drive train malfunction popped, as I was braking.

Any insight would be appreciated.

For reference when looking at JB4 logs.

For the fuel pump values: each value represents 150 psi. So 15 is equivalent to 2250 psi.
For trim values: 25 is 0% trims, 50 is +33% trims, 0 is -33% trims.

[ZM2]

Originally Posted by 435gc

Here is a log when the issue occurred.

https://datazap.me/u/435gc/ps2?log=0&data=1-3-4-10

I typically need to do 3rd gear pulls do to lack of location to get up to 4th gear speeds.

Car was feeling great, pulling hard. I shift to 4th wait a second or two and take my foot off the gas and start to upshift and brake. That's when the drive train malfunction popped, as I was braking.

Any insight would be appreciated.

For reference when looking at JB4 logs.

For the fuel pump values: each value represents 150 psi. So 15 is equivalent to 2250 psi.
For trim values: 25 is 0% trims, 50 is +33% trims, 0 is -33% trims.

This is out of the realm of my expertise. thejeremyman9 ?

[thejeremyman9]

Originally Posted by 435gc

Here is a log when the issue occurred.

https://datazap.me/u/435gc/ps2?log=0&data=1-3-4-10

I typically need to do 3rd gear pulls do to lack of location to get up to 4th gear speeds.

Car was feeling great, pulling hard. I shift to 4th wait a second or two and take my foot off the gas and start to upshift and brake. That's when the drive train malfunction popped, as I was braking.

Any insight would be appreciated.

For reference when looking at JB4 logs.

For the fuel pump values: each value represents 150 psi. So 15 is equivalent to 2250 psi.
For trim values: 25 is 0% trims, 50 is +33% trims, 0 is -33% trims.

When you restarted the car, was it fine again? Was this the first time it happened?

I don't see anything in the log that would explain misfires. Timing looks fine and is reasonably conservative if you are spraying alot of meth. You do have a small throttle closure near the top of 3rd and im not sure why. Also don't know why fuel trims are positive if you are spraying meth, unless the BEF accounts for that or its because the ECU is seeing less PSI than you are actually targeting?

[435gc]

Originally Posted by thejeremyman9

When you restarted the car, was it fine again? Was this the first time it happened?

I don't see anything in the log that would explain misfires. Timing looks fine and is reasonably conservative if you are spraying alot of meth. You do have a small throttle closure near the top of 3rd and Im not sure why. Also don't know why fuel trims are positive if you are spraying meth, unless the BEF accounts for that or its because the ECU is seeing less PSI than you are actually targeting?

Hey I appreciate the extra set of eyes.

When I restarted the car it was still in limp mode and running rough. Codes still present. I cleared the codes and it ran fine after that. Guessing the injector cutoff was still in effect until the codes were cleared?

Yeah this was the first time this has happened.

I was guessing that the fuel trims may have been positive due to the high level of boost and that I may be reaching the limit of what fuel support the single #10 nozzle can provide? I have a dual set of #7 nozzles that I have been meaning to install.

I am relieved that, from what I am hearing, the issue doesn't look to be an AFR issue? That I assume would be indicative of a much more expensive problem to fix like a compression leak?

Oh and likely unrelated, I had a catless downpipe detected code present as well when I scanned after the limp mode event. Never got a CEL. Dunno if AA will honor a claim for no CEL but present on scan.

[thejeremyman9]

Originally Posted by 435gc

Hey I appreciate the extra set of eyes.

When I restarted the car it was still in limp mode and running rough. Codes still present. I cleared the codes and it ran fine after that. Guessing the injector cutoff was still in effect until the codes were cleared?

Yeah this was the first time this has happened.

I was guessing that the fuel trims may have been positive due to the high level of boost and that I may be reaching the limit of what fuel support the single #10 nozzle can provide? I have a dual set of #7 nozzles that I have been meaning to install.

I am relieved that, from what I am hearing, the issue doesn't look to be an AFR issue? That I assume would be indicative of a much more expensive problem to fix like a compression leak?

I am much less familiar with JB4+BEF than BM3/MHD. So the things i am not sure about is if the BEF accounts for (1) the fact that ECU psi < actual psi (i.e., in terms of fueling), and (2) if the BEF accounts for the meth, so it knows to add less fuel because it expects the meth to come. Positive fuel trims is basically saying more fuel was needed than the DME thought it needed to meet AFR target based on O2 feedback... without knowing the previous 2 questions, i don't know how to interpret the trims, or if it has something to do with you not spraying enough meth. 21+psi with a PS2 and stock HPFP is alot, yet HPFP pressure looks OK, so my initial inclination is you have enough meth.

I dont see AFR target in the log but the general trend (decreasing with increasing RPM) and values look reasonable.

If shutting off the injectors was a response to the misfires it detected, then yeah, you might have needed to clear those codes before it thought the issue was gone and could resume normal operation.

I don't know what you mean by compression "leak". If you mean low compression in a cylinder, that's unlikely. If that was the case it wouldnt be an intermittent problem.

EDIT: what code specifically for the DP? I get shadow codes for cat efficiency sometimes with fabspeed but my catalyst monitor is READY. Thats what matters.