09-30-2018, 11:46 AM | #1 |
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X5 50i spark plug and coils
Shout out to Maverik259, Doberman16, and DuSH for sharing spark resolutions for tuned 50i.
After running with JB4 and Dinan, I switched to BM3 Stage 1. Damn it's amazing. BUT car starting hesitating/shudder during WOT. As I read, the issue only gets worse and it did. Eventually lead to drive train malfunction and the car became a violent, rolling shaker bottle. Locked the DME and took it to the dealership to have X5M (gapped 0.023in) plugs, new coils, and X5M air filters installed. Results are that it did the trick! Car runs smooth and pulls amazing. Dyno scheduled for next week before DPs. |
03-02-2019, 10:27 AM | #6 |
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Sorry for dumb question but I am taking the car in for plug change at the dealership. My 50i has almost 60K miles. Also experienced drivetrain malfunction but cleared up. Intermittently feels lacking power during highway speeds.
Should I tell them to change the coils as well since they are already incurring the labor with spark plugs and technically it should just be additional parts only? |
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03-02-2019, 10:32 AM | #7 | |
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03-02-2019, 10:44 AM | #8 | |
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Thank you! I didn't want to unnecessarily replace but seems like a good idea to change out completely with plugs, at 60K miles. |
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03-02-2019, 04:14 PM | #9 |
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03-02-2019, 06:46 PM | #10 |
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My current issue with my 50i is when I try to accelerate while going past 70mph (for instance to pass someone), the car shuddering intermittently, almost as if I am going over bumpy road. I used my OBD scanner and there are no error codes, at least not yet. I presume its the plugs. I was going to try different gas (typically use 93 Costco) and or use Techron complete cleaner?
Last edited by sbkim; 03-02-2019 at 06:53 PM.. |
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03-04-2019, 10:13 PM | #11 | |
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03-05-2019, 06:30 AM | #12 |
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03-06-2019, 06:18 AM | #13 |
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03-06-2019, 11:57 AM | #14 |
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You're right, anything is possible so you never know. I'd at least just start with the plugs and go from there.
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03-06-2019, 01:11 PM | #15 |
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Thanks everyone. Going in for plugs tomorrow. I will keep you guys posted.
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03-06-2019, 05:11 PM | #16 |
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Just new plugs gapped to 0.23" fixed my 4th gear plus WOT stutter problems...
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03-08-2019, 05:01 PM | #18 |
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Are X5M plugs the best upgrade option? I recall a mention of NGK but can't find the model and what the thought was on performance.
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03-30-2019, 06:39 PM | #19 |
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03-30-2019, 07:31 PM | #20 |
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I went with NGK 97506 Laser Iridium
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03-31-2019, 10:19 AM | #21 | |
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03-31-2019, 10:20 AM | #22 | |
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