10-15-2020, 11:27 AM | #1 |
Enlisted Member
58
Rep 39
Posts |
Lag in car. Recommended spark plug change by Dealership
So I took my N55 M2 to the dealership on some minor issues also including that I felt a lag on the car. Felt slower and sluggish than normal. I have an Eventuri CAI which has given me a CEL since I’ve installed it about a year ago and figured it might be normal since it’s aftermarket. After the install of the CAI I thought I felt the car a bit sluggish but didn’t pay much attention to it thinking it was just in my head. Now the dealer is saying that the technician mentioned that they did feel a lag and they recommend changing out the spark plugs, $475. They didn’t specify and I didn’t ask(forgot to) if it was The total for parts and labor. He said if the spark plugs didn’t fix the lag issue, that they would move on to replacing the coils. My maintenance warranty ran out in April 2020 so I’m SOL and would have to pay out of this out of pocket.
Could it be that it does need spark plugs? Could it be that there is a leak on the CAI? Or could it be that my charge pipe has cracked and has an air leak? If I could save the money by avoiding spark plugs and possible coils change that would be great. By the way car is at approximately 26k miles. |
10-15-2020, 12:31 PM | #2 |
First Lieutenant
342
Rep 396
Posts |
What are the benefits of this intake again?
I mean besides giving a CEL, making the car feel sluggish and costing a bucket of money? On a more serious note, the spark plugs are probably due for a change anyway so you should still consider doing this. |
Appreciate
1
M FUELED58.00 |
10-15-2020, 02:31 PM | #4 | |
Lieutenant
537
Rep 560
Posts |
Quote:
|
|
Appreciate
1
M FUELED58.00 |
10-15-2020, 03:02 PM | #5 |
Banned
6626
Rep 4,145
Posts
Drives: '18 M2 6MT
Join Date: Sep 2019
Location: Missouri
|
I literally just came from the dealer, and here's what he told me.
The spark plug change is at 35K, and costs $550 (with labor), but he did it for me now (at 15K) so it would be free (my plan is up in December). He mentioned nothing about spark plugs being NEEDED at 35K miles, just that it was preventative, most say 60K miles. I'd say your problem isn't plugs. But if it is, I'd say that you can probably get them changed by any decent mechanic for a hell of a lot less than $475 or $550. The plugs themselves are what, $150? $475 and $550 is highway robbery... |
Appreciate
1
M FUELED58.00 |
10-15-2020, 03:27 PM | #6 | |
Banned
756
Rep 2,149
Posts |
Quote:
|
|
Appreciate
1
VisualEcho6625.50 |
10-15-2020, 03:40 PM | #7 |
Enlisted Member
58
Rep 39
Posts |
Eventuri claims some HP/TQ gains on their dyno but honestly I did it more for the look under the hood. But if the lag is being caused by the CAI then I will most definitely just get rid of it.
I will be running a diagnostic myself, not sure why I haven’t done one lately. This dealership is pretty small with about maybe 10 cars in stock and 3 loaners which is why they denied me one lol. This is exactly what I was thinking(dealer not being cost efficient). The service guy seemed real pushy on getting the spark plugs ordered already even though I was telling him I would let him know in about a week if I would be going through with it. I’ll first try to check the connections on the CAI to make sure they’re fully sealed and test it from there and also run a diagnostic test. If the issue persists I’ll take it to indie shop to See what they recommend and perhaps have them do the spark plugs, chargepipe I’m getting in mail today and catless downpipe I got the other day. Thanks for the help guys. |
Appreciate
0
|
10-15-2020, 03:42 PM | #8 | |
Enlisted Member
58
Rep 39
Posts |
I saw a video earlier today on how to change them. It does look fairly easy with the exception on the one closest to the firewall. Hopefully the indie shop won’t charge much if not I’ll try to tackle the spark plug change myself.
Quote:
|
|
Appreciate
0
|
10-15-2020, 04:49 PM | #9 | |
Lieutenant Colonel
1717
Rep 1,899
Posts |
Quote:
|
|
Appreciate
0
|
10-15-2020, 11:28 PM | #10 |
Enlisted Member
58
Rep 39
Posts |
True. But I think I may have found the problem possibly and hopefully. Driving back home from the dealership, I had it on sport+ and would occasionally floor it with no problem other than the lag I’ve already mentioned. Nothing new. That was about a 40 minute drive. I stopped at parents before heading home for about an hour. On my way home, which is about a 20 minute drive, again on sport+ I did a hard acceleration from 3rd to 4th gear(DCT) and heard a loud AF pop which scared the heck out of me because I thought the worst. I tried accelerating to see how the car would react and only the RPM’s would move quickly as if I had it on neutral. The MPH would slowly move, matched by my cars acceleration, a freakin Prius could’ve swooshed by me. I drove about 1 more minute to get to my house. The car sounds a lot louder than usual. Accelerates at speed of about 10% (Don’t quote, me just threw out a random number) of what it should. And check engine light is on. Based on what I just read on a couple of posts on the forum, it sounds like the chargepipe gave out.
I just find it a bit weird that it happened on the first day ever that I take it into a dealership, when I’ve driven that car slow like a grandma and to its full potential with the only “performance” part being the CAI. Dealership did change out the fuel tank ventilator. I don’t know if this has anything to do with the incident that happened earlier. Last edited by M FUELED; 10-16-2020 at 02:22 AM.. Reason: Grammatical errors |
Appreciate
0
|
10-16-2020, 12:36 AM | #11 |
Major General
7178
Rep 7,342
Posts |
If you need good diagnostics get yourself an MHD enet adapter for $69 (yes it is expensive but here's why it is worth it) then you can do the following:
1) Use it with any length ethernet cable you desire and that allows you to get an enet cable that works with ISTA (bmw's factory diagnostics software and much better than any garbage obd2 scanner), and you also can use it with esys for coding. Both of these softwares are free. 2) You can use the MHD adapter with MHD's logging software aka the monitor module allowing you extremely fast data logging of critical parts of your car. 3) The MHD adapter works with other apps like: XHP transmission flashing, thor (drive train flashing), bimmer code, bimmer link, MHD's tuning software. So essentially one adapter fitting all your needs instead of having to buy: an enet cable, blue tooth adapter for the apps, and a k+dcan cable for mhd flashing.
__________________
Click on the link below to see a compiled list of every review I have ever written:
https://f87.bimmerpost.com/forums/sh...2#post30368242 |
Appreciate
1
M FUELED58.00 |
10-16-2020, 02:23 AM | #12 | |
Enlisted Member
58
Rep 39
Posts |
Thank you, I’ll definitely consider this
Quote:
|
|
Appreciate
0
|
10-16-2020, 02:44 AM | #13 |
Major General
7178
Rep 7,342
Posts |
No problem, that way you won't be at the mercy of a dealership telling you to swap everything.
__________________
Click on the link below to see a compiled list of every review I have ever written:
https://f87.bimmerpost.com/forums/sh...2#post30368242 |
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|