Changing Injectors Yourself? New plugs Shiv found?

Ironring Racing · 05-11-2009, 10:30 PM

Just wondering if anyone has changed the injectors themselves? I've been getting missfire's on 1 & 6 and the dealer won't touch it because I've got downpipes (!)

I was planning on changing the plugs at the same time, but since I'm guessing it's the injectors that's the priority to change. I know Shiv had hinted he'd found some new plugs, but after looking back 14 pages I couldn't find the thread. Anyone know what the details on the new plugs were?

hotrod182 · 05-11-2009, 11:19 PM

Quote:

Originally Posted by Ironring Racing

Just wondering if anyone has changed the injectors themselves? I've been getting missfire's on 1 & 6 and the dealer won't touch it because I've got downpipes (!)

I was planning on changing the plugs at the same time, but since I'm guessing it's the injectors that's the priority to change. I know Shiv had hinted he'd found some new plugs, but after looking back 14 pages I couldn't find the thread. Anyone know what the details on the new plugs were?

Those injectors are damn expensive. Won't find them at the local auto parts store, LOL.

ianthegreat · 05-11-2009, 11:20 PM

links?

AlpineG05 · 05-11-2009, 11:23 PM

dealer changed mine and new plugs because i had misfires on 1&3 but i don't have DPs best thing would be to remove your DPs, i think so.

Ironring Racing · 05-11-2009, 11:51 PM

HotRod: I've been reading some more threads on this. Am I wrong to suspect the injectors first? Seems like several (Shiv was one) have pointed to new plugs as the issue rather than the injectors. I know I've read of people having fouled injectors replaced, but plugs is certainly an easier and cheaper first step. What have you seen?

Alpine: Maybe, but that's not a small job, and then putting them back after the fix.

AlpineG05 · 05-12-2009, 12:25 AM

Quote:

Originally Posted by Ironring Racing

HotRod: I've been reading some more threads on this. Am I wrong to suspect the injectors first? Seems like several (Shiv was one) have pointed to new plugs as the issue rather than the injectors. I know I've read of people having fouled injectors replaced, but plugs is certainly an easier and cheaper first step. What have you seen?

Alpine: Maybe, but that's not a small job, and then putting them back after the fix.

true but....i were you that's the route i would take to get everything solved and covered under warranty.

btw do you have a rough idle on a cold starts?

gian335 · 05-12-2009, 12:49 AM

Isnt ngk comin out with their new plugs?

JO3 · 05-12-2009, 12:53 AM

Yes, it was NGK. Here's the link:

http://www.e90post.com/forums/showthread.php?t=252424

lawdude · 05-12-2009, 01:05 AM

Going back through the cobwebs of my minds I seem to remember that Shiv tried a particular plug that didn't work out.

OpenFlash · 05-12-2009, 01:28 AM

Quote:

Originally Posted by lawdude

Going back through the cobwebs of my minds I seem to remember that Shiv tried a particular plug that didn't work out.

Yep... it didn't seem to work any better than the stockers. Despite being gap-able and 2 steps colder rated.

Shiv

Ironring Racing · 05-12-2009, 02:01 AM

Thanks guys,

OK, so best to start with the plugs. Btw, do you know of anyone who has taken out the injectors, or are they a special fitting to remove? I'm just guessing here that they're the unfinished metal units with the tubing, above the plugs in the pic, and look easy to access (as seen in this pic from e.n335's spark plug change DIY), but I haven't had the engine cover off yet.

If I'm correct that those are the injectors, are they easy to remove/replace if the plugs don't fix it?

2e9x's · 05-12-2009, 07:50 AM

The shop cost on the injectors is about $450 each. I don't know about special tools but I do know that the new injectors have to be coded to the car.

In my case, the car had a misfire on 2 and 5. Those 2 injectors were replaced. Less than a week later the car was back in the shop with a bad misfire. This time it was on 1 and 5 (yup...the cylinder with the new injector). My tech convinced BMW to change all 6 plugs and all 4 remaining injectors. Now it is smooth again.

All that to say I think the plugs may be the bigger issue. I saw plugs out of another 335i that had been misfiring. The prongs were bent WAY out of shape. If I was you I would start by changing those first since the plugs are only about $15 each.

Curt2000 · 05-12-2009, 07:58 AM

If its not the plugs then its the coil packs...your having an ignition problem not an injector problem. The factory spec on the coil packs is pretty loose and we have found them to vary greatly in quality...once you start to mod then there is no guaruntee that you will not have misfires because you might have the coils that made it through on the low end of the QC...looks like you might have two!

scottp999 · 05-12-2009, 08:07 AM

Injector = $260 part number 13537585261
Plugs = $140 with N54 socket
Ignition Coil = $51

Get them from the site sponsor Tischer BMW - http://www.getbmwparts.com

I would start with plugs only and see what that does.

ianthegreat · 05-12-2009, 08:28 AM

I'm curious.. aftermarket downpipes aren't exactly the easiest thing to spot. Did you actually tell them you had the dp's or did a tech spot them after diagnosing your car?

rismo · 05-12-2009, 08:35 AM

I had the misfires in 3,4,5 and 6.

BMW replaced my ignition coils and all plugs... problem solved!

Especially with a tune plugs and coils gets quicker to the end of their life...

thegeneral101 · 05-12-2009, 09:16 AM

Quote:

Originally Posted by Curt2000

If its not the plugs then its the coil packs...your having an ignition problem not an injector problem. The factory spec on the coil packs is pretty loose and we have found them to vary greatly in quality...once you start to mod then there is no guaruntee that you will not have misfires because you might have the coils that made it through on the low end of the QC...looks like you might have two!

not true, it could be injectors.

to the op, just change your plugs first. if the problem persists start thinking about injectors/coils

Ironring Racing · 05-12-2009, 11:48 AM

Thanks guys.

No, they looked for the DP's. I had left the codes in so it showed the missfires, but there was also a Cat code (UR catted DP's-usually with the O2 sim on V3, but took it out before the visit), which made him look at the exhaust.

I'll try the plugs, then coils, then injectors. Really, with all of the above, you may be right, might be cheaper to take the DP's out and have them fix it. But as we heard above, fixing it might take a few weeks and multiple trips.

Anyway, thanks for all the help. Especially knowing the injectors have to be coded, not a DIY job.

I can see why an old F1 mechanic I used to know (for Ferrari back in the 50's) always said his pick for the perfect car was a VW Beetle and a tool box, cause there's nothing he couldn't fix on the side of the road! lol

05-11-2009, 10:30 PM	#1
Ironring Racing N54 FTW! 25 Rep 389 Posts Drives: BMW 335i 6MT Join Date: Aug 2008 Location: Calgary, Canada iTrader: (3)	Changing Injectors Yourself? New plugs Shiv found? Just wondering if anyone has changed the injectors themselves? I've been getting missfire's on 1 & 6 and the dealer won't touch it because I've got downpipes (!) I was planning on changing the plugs at the same time, but since I'm guessing it's the injectors that's the priority to change. I know Shiv had hinted he'd found some new plugs, but after looking back 14 pages I couldn't find the thread. Anyone know what the details on the new plugs were?
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05-11-2009, 11:20 PM	#3
ianthegreat Colonel 60 Rep 2,314 Posts Drives: n54 Join Date: Apr 2008 Location: Pittsburgh/Houston iTrader: (1)	links?
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05-11-2009, 11:23 PM	#4
AlpineG05 hi 129 Rep 1,140 Posts Drives: Alpine White G05 Join Date: Feb 2008 Location: Bakersfield, Cali iTrader: (1)	dealer changed mine and new plugs because i had misfires on 1&3 but i don't have DPs best thing would be to remove your DPs, i think so. __________________ 2022 M Sport G05 Jb4, CTS catless dp, M performance exhaust, bms intake, IND goodies, Maxton kit
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05-11-2009, 11:51 PM	#5
Ironring Racing N54 FTW! 25 Rep 389 Posts Drives: BMW 335i 6MT Join Date: Aug 2008 Location: Calgary, Canada iTrader: (3)	HotRod: I've been reading some more threads on this. Am I wrong to suspect the injectors first? Seems like several (Shiv was one) have pointed to new plugs as the issue rather than the injectors. I know I've read of people having fouled injectors replaced, but plugs is certainly an easier and cheaper first step. What have you seen? Alpine: Maybe, but that's not a small job, and then putting them back after the fix.
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05-12-2009, 12:49 AM	#7
gian335 Major 36 Rep 1,031 Posts Drives: e92 335 Join Date: Apr 2008 Location: uknown iTrader: (1)	Isnt ngk comin out with their new plugs?
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05-12-2009, 12:53 AM	#8
JO3 Lieutenant 12 Rep 566 Posts Drives: a lot Join Date: Mar 2006 Location: CA iTrader: (8)	Yes, it was NGK. Here's the link: http://www.e90post.com/forums/showthread.php?t=252424
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05-12-2009, 01:05 AM	#9
lawdude Colonel 93 Rep 2,339 Posts Drives: 335i ZPP ZSP TiAg MT Join Date: Jul 2006 Location: Georgia iTrader: (1)	Going back through the cobwebs of my minds I seem to remember that Shiv tried a particular plug that didn't work out. __________________ What do I know? I'm insane.
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05-12-2009, 02:01 AM	#11
Ironring Racing N54 FTW! 25 Rep 389 Posts Drives: BMW 335i 6MT Join Date: Aug 2008 Location: Calgary, Canada iTrader: (3)	Thanks guys, OK, so best to start with the plugs. Btw, do you know of anyone who has taken out the injectors, or are they a special fitting to remove? I'm just guessing here that they're the unfinished metal units with the tubing, above the plugs in the pic, and look easy to access (as seen in this pic from e.n335's spark plug change DIY), but I haven't had the engine cover off yet. If I'm correct that those are the injectors, are they easy to remove/replace if the plugs don't fix it? Attached Images
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05-12-2009, 07:50 AM	#12
2e9x's Major 50 Rep 1,137 Posts Drives: 335i ED 7/07 Join Date: Dec 2006 Location: A Sunny Place iTrader: (2)	The shop cost on the injectors is about $450 each. I don't know about special tools but I do know that the new injectors have to be coded to the car. In my case, the car had a misfire on 2 and 5. Those 2 injectors were replaced. Less than a week later the car was back in the shop with a bad misfire. This time it was on 1 and 5 (yup...the cylinder with the new injector). My tech convinced BMW to change all 6 plugs and all 4 remaining injectors. Now it is smooth again. All that to say I think the plugs may be the bigger issue. I saw plugs out of another 335i that had been misfiring. The prongs were bent WAY out of shape. If I was you I would start by changing those first since the plugs are only about $15 each. __________________ 2010 Evo X - silver with a big, stupid wing on the back 2009 VW CC - Black/Black - with a 2011 328i on order to replace it - ED 8/1/11
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05-12-2009, 07:58 AM	#13
Curt2000 Brigadier General 1013 Rep 3,157 Posts Drives: '93 Supra Turbo Join Date: Jun 2007 Location: Washington D.C. iTrader: (25)	If its not the plugs then its the coil packs...your having an ignition problem not an injector problem. The factory spec on the coil packs is pretty loose and we have found them to vary greatly in quality...once you start to mod then there is no guaruntee that you will not have misfires because you might have the coils that made it through on the low end of the QC...looks like you might have two! __________________ Former Car: '16 SUNBURST GOLD F80 ///M3--6MT/Carbon Cloth (ED Thread) Former Car:'13 SANTORINI BLUE E92///M3--6MT/Speed Cloth/ZCP(ED Thread) INSTAGRAM:@C2KMotorsports
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05-12-2009, 08:07 AM	#14
scottp999 Brigadier General 133 Rep 4,764 Posts Drives: 4runner SR5 Join Date: Mar 2007 Location: MD iTrader: (2) Garage List 2007 BMW 335 [9.00]	Injector = $260 part number 13537585261 Plugs = $140 with N54 socket Ignition Coil = $51 Get them from the site sponsor Tischer BMW - http://www.getbmwparts.com I would start with plugs only and see what that does.
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05-12-2009, 08:28 AM	#15
ianthegreat Colonel 60 Rep 2,314 Posts Drives: n54 Join Date: Apr 2008 Location: Pittsburgh/Houston iTrader: (1)	I'm curious.. aftermarket downpipes aren't exactly the easiest thing to spot. Did you actually tell them you had the dp's or did a tech spot them after diagnosing your car?
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05-12-2009, 08:35 AM	#16
rismo Captain 76 Rep 911 Posts Drives: BMW E92 335 Join Date: Jul 2008 Location: Europe iTrader: (0)	I had the misfires in 3,4,5 and 6. BMW replaced my ignition coils and all plugs... problem solved! Especially with a tune plugs and coils gets quicker to the end of their life... __________________ BMW 335 E92 09 - Full options - DKG - MHD by Buraq - RB Next Gen - RB Inlets/Outlet - Forge Diverter Valves - AR Catless DP - Afe Intake - Helix IC - FuelIT Stage 2 LPFP - Ar Oil Cooler - PPK Water Cooler - M3 Suspension - JRZ RS1 Shocks - Eibach Pro Springs - Drexler LSD - BMW IS Exhaust - Carbon Endurance Brake Pads - Stainless Steel Brake Lines - M101 Wheels - Michelin PS2 - M-Tech Body - M-Strutbar BMW M550i G30 2019 - BM3
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05-12-2009, 11:48 AM	#18
Ironring Racing N54 FTW! 25 Rep 389 Posts Drives: BMW 335i 6MT Join Date: Aug 2008 Location: Calgary, Canada iTrader: (3)	Thanks guys. No, they looked for the DP's. I had left the codes in so it showed the missfires, but there was also a Cat code (UR catted DP's-usually with the O2 sim on V3, but took it out before the visit), which made him look at the exhaust. I'll try the plugs, then coils, then injectors. Really, with all of the above, you may be right, might be cheaper to take the DP's out and have them fix it. But as we heard above, fixing it might take a few weeks and multiple trips. Anyway, thanks for all the help. Especially knowing the injectors have to be coded, not a DIY job. I can see why an old F1 mechanic I used to know (for Ferrari back in the 50's) always said his pick for the perfect car was a VW Beetle and a tool box, cause there's nothing he couldn't fix on the side of the road! lol
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