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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 05-09-2013, 07:37 AM
daytrader daytrader is offline
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Injector replacement

So after only 31K, I was experiencing early morning rough idle and misfires. Went in for a service and had all 6 injectors replaced with new updated versions as I was told the current ones were older version. All done under warranty.

So how long will these new gen injectors last? 30k on the originals is pretty unacceptable, not to mention the cost of the service if I would have been out of warranty.

I know we're covered with extended warranties for our HPFPs and turbos, I just didn't realize the injectors were so expensive. Makes me want to rethink and consider an extra warranty coverage program if there is a chance these injectors don't hold up.
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  #2  
Old 05-09-2013, 07:46 AM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by daytrader View Post
So after only 31K, I was experiencing early morning rough idle and misfires. Went in for a service and had all 6 injectors replaced with new updated versions as I was told the current ones were older version. All done under warranty.

So how long will these new gen injectors last? 30k on the originals is pretty unacceptable, not to mention the cost of the service if I would have been out of warranty.

I know we're covered with extended warranties for our HPFPs and turbos, I just didn't realize the injectors were so expensive. Makes me want to rethink and consider an extra warranty coverage program if there is a chance these injectors don't hold up.

What expensive? Why, DIY's abound.

Then again, all six???? Suspicious. What exactly was found wrong? Your issue was typical of impending HPFP failure, solved in software w/pre-emptive hardware replacement.
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Old 05-09-2013, 08:41 AM
daytrader daytrader is offline
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Verbatim from the service receipt.

"Cylinders 5 and 6 are misfiring. Found bank 2 injectors leaking. Vehicle equipped with outdated injectors. Also bank 2 spark plugs fouled by injectors. Connected battery charger. Battery voltage 12.6 volts. Ran vehicle test. Faults stored, 29cc, 29d2, 29d1. Bank 2 injectors faulty. Updated injectors required all injectors to be replaced. Replaced all 6 injectors. Calibrated injector volume. Reset engine adaptations. Road tested for proper operation. Verified repair."


RE; HPFP replacement and software update, they were done at 2k on the odometer.
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Old 05-09-2013, 08:45 AM
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CALWATERBOY CALWATERBOY is offline
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Originally Posted by daytrader View Post
Verbatim from the service receipt.

"Cylinders 5 and 6 are misfiring. Found bank 2 injectors leaking. Vehicle equipped with outdated injectors. Also bank 2 spark plugs fouled by injectors. Connected battery charger. Battery voltage 12.6 volts. Ran vehicle test. Faults stored, 29cc, 29d2, 29d1. Bank 2 injectors faulty. Updated injectors required all injectors to be replaced. Replaced all 6 injectors. Calibrated injector volume. Reset engine adaptations. Road tested for proper operation. Verified repair."

And there it is. Thanks! Useful info....
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  #5  
Old 05-09-2013, 08:55 AM
daytrader daytrader is offline
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So is it reasonable to expect injectors to last the life of the car or are they replaced like lets say spark plugs, at regular maintenance intervals?
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Old 05-09-2013, 09:16 AM
hondo402000 hondo402000 is offline
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since the engine is direct injected, I am thinking the injectors get pressure when the engine is on the compression stroke and also get the heat from firing? Would I be correct in my thinking, if thats the case you would think they are not protected like being on the intake side of the valves, so they are in a tougher environment.
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Old 05-09-2013, 09:22 AM
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CALWATERBOY CALWATERBOY is offline
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Originally Posted by daytrader View Post
So is it reasonable to expect injectors to last the life of the car or are they replaced like lets say spark plugs, at regular maintenance intervals?

Piezoelectrics don't last forever and injectors prob will be replaced at a point unknown. Car runs as long as you care to fix it.
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Old 05-09-2013, 10:04 AM
jburke4689 jburke4689 is offline
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All six of mine were replaced with the HPFP recall. That was 61k miles ago and no problems since. Calwaterboy is right. DIY injectors is easy and they don't cost a whole lot more than any other injectors on other cars. And hondo, you are correct about the tougher environment but the injectors are designed for that environment. Think about a diesel. Compression is at least 3 times higher and heat is higher but no one complains about those injectors.

High presicion direct injection in gas engines makes high compression, fuel efficient, turbo-charged motors possible. It is great advance but there are growing pains.
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Old 05-09-2013, 10:22 AM
SuperTerp SuperTerp is offline
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I had mine done around 35-45 and they first did like 1 bank then finally did them all.

Same thing rough idle and miss + ses
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Old 05-09-2013, 10:55 AM
pony_trekker pony_trekker is offline
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Another reason I think I am going to keep my N51.
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Old 05-09-2013, 10:56 AM
SuperTerp SuperTerp is offline
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Another reason I think I am going to keep my N51.
Gotta pay to play... Be glad you don't own a Maserati
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