|
|
|
|
Post Reply |
|
Thread Tools | Search this Thread |
11-12-2017, 10:00 PM | #1 |
Major
545
Rep 1,233
Posts |
Mild misfires - Which plugs & coils to use on a tuned car?
Hi Guys,
Lots of discussion on this, lots of different contexts. I have not been able to find a good consensus on what plugs and coils are recommended for an N52 w/ tune. Context: I have a 128i w/ BPC Stage 1 tune, car now has 120K kms on it (75K miles). Tune was put in around 4 months ago, car ran great and felt a lot more muscular than before. Started to notice a mild hiccup about 2 months ago, if I apply part throttle below 2krpm in a higher gear. I don't typically lug the engine, but will use the low end torque to accelerate gently even if in a high gear. Car before did not complain about this, but started stuttering a little while ago and it has progressively gotten worse. My theory is the tune is asking more of the engine, and the original plugs & coils can't supply the requested spark/strength that the tune requires. Likely accelerated the wear and now things are starting to go. So - my question is what plugs/coils do people have good experiences with? There is a huge price difference between BMW parts and alternatives. This Bosch set at ECS is on sale right now: https://www.ecstuning.com/b-assemble...2137594937kt2/ I've heard of people liking NGK with Delphi coils....but there are so many part numbers, even between sites, so hard to figure out what is good Any help appreciated thanks. |
11-13-2017, 09:19 AM | #2 |
E82 Mudflap Ambassador
2214
Rep 2,219
Posts
Drives: '08 128i
Join Date: May 2016
Location: Orlando, FL
|
This isn't an N54 so don't worry too much about plugs and coils. Replace with non-BMW to save some cash and you'll be fine.
I put NGKs in my car when I took Boschs out and never have any issues. (As far as I know) stock coils at 107k mi, although not tuned. While you're at it, just do a whole tuneup. Clean VANOS solenoids and filters, clean MAF, make sure you got clean good quality 91+ octane.
__________________
My 2008 128i - Sparkling Graphite/Beige - Sport pkg - 6MT - Click me!
Parents' 2014 528i - Mineral White/Ivory White - fully loaded Instagram @Andreys_128i and @Honda.Bito |
Appreciate
0
|
11-13-2017, 09:38 AM | #3 | |
Sideways and Smiling
3027
Rep 2,860
Posts
Drives: In Exuberance
Join Date: Mar 2017
Location: Rosamond, CA USA
|
Quote:
87 works just fine! My car does not like 93 Sunoco stuff from the track, it developed a lumpy high idle after start-up, but would settle down. Since you'll have the engine cover off, you might as well do some of this, though, if you don't have any real problems, it probably isn't worth your while to dig into all of that.
__________________
2012 BMW 328i 6-Speed Wagon | Deep Sea Blue with Grey Dakota Leather | Manual Swap, 330i Intake + Tune, 3.15 Helical LSD, Öhlins R&T
(SOLD) 2009 BMW 128i 6-Speed Coupé | Monaco Blue with Black Sensatec | chris_flies' 128i thread |
|
Appreciate
0
|
11-29-2017, 11:19 AM | #5 |
Colonel
2183
Rep 2,806
Posts |
Curious what NGK plug you used? I bought NGK plugs based on the one shown in RealOEM: LZFR6AP11GS NGK stock #95712.
__________________
E82 / BMWP Springs / Koni Yellows / M front control arms / Adjustable front endlinks / M rear guide rods / Whiteline Poly RSFB
|
Appreciate
0
|
11-29-2017, 11:58 AM | #6 | |
Major
545
Rep 1,233
Posts |
Quote:
ECS lists 2 types: Laser Iridium Spark Plugs (ILZFR6D11) Spark Plug - (LZFR6AP11GS) NGK's site lists the 95712, so that's what I went with. https://www.ngk.com/Automotive-NGK-c1411.aspx |
|
Appreciate
0
|
11-29-2017, 12:13 PM | #7 | |
Colonel
2183
Rep 2,806
Posts |
Quote:
A thought about your tune and plugs - maybe the tune places more demand on the plugs and they die or foul quicker?
__________________
E82 / BMWP Springs / Koni Yellows / M front control arms / Adjustable front endlinks / M rear guide rods / Whiteline Poly RSFB
|
|
Appreciate
0
|
11-29-2017, 12:39 PM | #8 | |
Major
545
Rep 1,233
Posts |
Quote:
Based on what I felt and in speaking with my mechanic, it was classic plug failure most likely and not a coil - car would stumble under "heavy load" conditions, but no check engine lights (mechanic confirmed he has seen this often when a plug is about to go, vs a coil going). Butter smooth and muscular once again...too bad the winter tires are now on |
|
Appreciate
1
gjm1202183.00 |
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|