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Old 05-14-2020, 09:42 AM   #1
Solving problems
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Join Date: Oct 2003
Carmudgeonly Ride: '21 GTI, '18 M3 ZCP, '13 LR4, '11 Miata
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MAF and Throttle body cleaning

Yesterday I finished a bunch of preventive maintenance stuff on the Miata as it has 9.5 years and 95k miles now.

- Accessory belt
- Thermostat housing
- Coolant tank
- Coolant flush
- MAF and throttle body cleaning

The MAF and TB were both pretty dirty. The TB had to come out for the (PITA) thermostat job, so I figured I'd clean it. The thing is, this is my first time cleaning such items on any car.

People claim it improves idling, mpg, etc. I drove the car around to check the cooling system and did not notice a big difference, but I am curious how often (if at all) you guys do this.

Anyway, the Miata should be good for a while other than diff and transmission fluid changes that were done last at the 60k mile service in 2014. That will wait until next year.

Last edited by FC; 05-14-2020 at 10:02 AM.
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Old 05-14-2020, 09:44 AM   #2
Nick M3
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Location: Bethesda, MD
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Unless the actual MAF element is fouled (i.e. by oil from a K&N filter), I have never noticed a meaningful change from cleaning either. I still will do it if they're dirty.
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Old 05-14-2020, 01:51 PM   #3
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I did the same clean to the e39 528i (with vague hopes). No change but no harm done either.
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