How often do injectors fail?

[xShadows]

It's not so much the e85 as much as it is that a lot of e85 tunes crank up the HPFP to close to 250bar (200 or 205 is stock).

[theweebabySeamus]

Originally Posted by m4dbimmer

Wouldnt hurt to at least have one new injector handy. When one fails, the car is not really driveable. You can drive it home, but I wouldn't go any further. Good news is it's a pretty easy DIY job.

Does it fail open or closed? Id probably keep an oil change worth of oil handy too, if they fail open.

[sicck_m4]

Originally Posted by m4dbimmer

Wouldnt hurt to at least have one new injector handy. When one fails, the car is not really driveable. You can drive it home, but I wouldn't go any further. Good news is it's a pretty easy DIY job.

Happened to me tonight. I was at the 1/4 mile track. Did 10 passes. On the last pass, I got a drivetrain malfunction with injector 5 failed and shut off that injector. I limped the car home 8 miles. Scared to turn off and possibility of not restarting and a tow. Made it home. Restarted the car, code went away, and everything is back to normal.

[m4dbimmer]

Originally Posted by theweebabySeamus

Does it fail open or closed? Id probably keep an oil change worth of oil handy too, if they fail open.

My guess is open. The plugs were soaked with fuel both times.

[tomlong]

Seems like E85 is problematic on the S55. This is the 4th or 5th thread I've read in the span of just 10-15mins. Just like COVID-19, I can only imagine the level of "under-reported" or "not reported" cases out there.

Is there an aftermarket fuel injector solution?

[tom @ eas]

Originally Posted by tomlong

Seems like E85 is problematic on the S55. This is the 4th or 5th thread I've read in the span of just 10-15mins. Just like COVID-19, I can only imagine the level of "under-reported" or "not reported" cases out there.

Is there an aftermarket fuel injector solution?

One sided. For every failure reported, there are tons of happy other E85 users out there running issue-free.

[ckendri]

Originally Posted by tom @ eas

One sided. For every failure reported, there are tons of happy other E85 users out there running issue-free.

I'm E85 with 48k on the car. Ran E85 for the past 2k only, but no problems here. I will report if I have a failure though. Just some more information for you.

[sicck_m4]

Originally Posted by sicck_f82

Happened to me tonight. I was at the 1/4 mile track. Did 10 passes. On the last pass, I got a drivetrain malfunction with injector 5 failed and shut off that injector. I limped the car home 8 miles. Scared to turn off and possibility of not restarting and a tow. Made it home. Restarted the car, code went away, and everything is back to normal.

**update**

Reflash and went back to pump gas. Misfire was still present. Added Lucas Oil fuel injection cleaner with my doubts, it cleared up most of the misfires on WOT. This week I changed the Bosch oem to NGK 97506 and car is running great again. No misfires or hiccups.

[BlownOne]

I swear by the Lucas oil upper cylinder lubricant/ fuel system cleaner. I Use an entire 32oz bottle when I buy any car (4 8oz doses per tank) then use it when I cycle pump gas at 8oz per tank for maintenance. Zero issue with almost 12k miles of e85 usage on this car plus countless other e85 converted builds Ive done.

Tom is right, for every reported failure, there’s 100’s of cars running perfectly fine.

[tomlong]

Originally Posted by ckendri

I'm E85 with 48k on the car. Ran E85 for the past 2k only, but no problems here. I will report if I have a failure though. Just some more information for you.

That's great to hear. Please check in when your sample size (miles) increases.

[ckendri]

Originally Posted by tomlong

That's great to hear. Please check in when your sample size (miles) increases.

Absolutely!!

[Ryanf80M3]

Originally Posted by m4dbimmer

Wouldnt hurt to at least have one new injector handy. When one fails, the car is not really driveable. You can drive it home, but I wouldn't go any further. Good news is it's a pretty easy DIY job.

Was driving my 2015 M3 down the motorway, warning light comes on. Pull over at my parents as it's round the corner, white smoke pissing out of the exhaust. You would've thought the car was ready to blow up the amount of smoke there was. Took it to BMW which was around 8 miles away, I used 1/6th of a tank doing so.

An injector was stuck open, dumping fuel into my exhaust which happens to be an MPE. Straight away I expected the worst, the exhaust itself would be thousands to replace.

I was working away, they kept the car in and my partner dealt with the garage. A 2018 M5 had not long been in with the same issue, they changed 1 injector and within 2 weeks it happened again only this time the rest of the bank of 4 had gone because they'd only changed 1 and it wasn't in sync with the other 3 apparently?

Because of that, they changed the bank of 3 with the plugs, and drained the small amount of fuel from the exhaust and luckily there was no damage. They done this as a goodwill gesture as the car was out of warranty, cost me the diagnostic fee only.

[CruzM3]

Just had my '18 M3 with 5,500mi throw a code for injector failure on cylinder #5. I just got it a week ago but luckily it's still under warranty. Dealer got me squared away with a new injector but I'm want to know why this his happening with such low miles. I'll see what else I find out when I go to pick it up on Tuesday.

[bobbyh907]

No e85 here, but running oodles of race fuel. 60k miles and not a hiccup from the fuel system. Seems like using a lubricant with the e85 is cheap insurance to get longer life out of the injectors.

[m4dbimmer]

Update: Running e30 since 65k miles - now at 73k miles with 2 injectors (1 & 5) failed.