Has anyone tried to clean the MAP sensor on a T-Bird? - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 17 (permalink) Old 03-17-2019, 02:17 AM Thread Starter
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Has anyone tried to clean the MAP sensor on a T-Bird?

I am just wondering if anyone has tried cleaning the MAP sensor (body) on a T-Bird with special Mass Air Flow (MAF) cleaner?
I am trying to trace where my vibration issue happened and it was after I switched to the K&N filters and did the first filter cleaning. Unlike most other bikes, the K&N filter in the case of the T-Bird has to be sprayed from the inside and not the outside part unlike Harley filters (the special spray should be on the side where air enters not from where it exits).
I -unfortunately- committed the mistake of spraying it from the outside part (which is the air exit part) and I think that traces of that spray may have affected the MAP sensor (although I don't have any Check Engine light issue).
I have used a MAF cleaner on the MAF sensor body of my vehicle and the result was excellent (Check Engine light was ON because of MAF error and it turned OFF after cleaning).
Any ideas or recommendations?
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post #2 of 17 (permalink) Old 03-17-2019, 09:16 AM
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I’m not sure I understand what you’re saying re: cleaning the filter. Are you referring to the air filter? If so, you shouldn’t be cleaning or spraying it while it’s on the bike. You need to remove the filter.. spray the outside and inside with cleaner.. leave it to sit for 5-10 minutes to loosen up the dirt.. and then gently rinse it in warm water til it’s clean. Then you should leave it to air dry (I usually leave it for at least 10-12 hours). Once it’s dry.. you lightly and evenly spray the filter oil on the outside of the filter.
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post #3 of 17 (permalink) Old 03-17-2019, 05:04 PM Thread Starter
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Yes, I mean the air filter. And of course I take it out and clean outside as you mention.
But the first time I cleaned it, I sprayed the oil on the external part which is incorrect, because the external part is actually the air-outlet side for T-Brids. It is the internal part that should be sprayed with oil (unlike Harley filters). Please see attached photo I just made to show my point.

I suspect that from the first time I sprayed the oil (on the external part - which is the air-outlet in my T-Bird), some of the oil could have contaminated the MAP sensor(s).
Attached Images
 

Last edited by sefri; 03-17-2019 at 05:07 PM.
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post #4 of 17 (permalink) Old 03-19-2019, 10:49 AM
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I had K&N filters on 3 different bikes and currently have 80000+ miles on this filter. I spray my filter on the outside with enough oil to make the gauze filter material a consistent color. Let it soak in. Then use a brush or compressed air to remove the oil from the wire on the outside of the filter. I do it every 6000 miles when I change my engine oil. Never had a problem.
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post #5 of 17 (permalink) Old 03-19-2019, 12:56 PM
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Ya.. I think your prob is that you sprayed the inside of the filter. You definitely should be spraying the outside.
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post #6 of 17 (permalink) Old 03-19-2019, 01:53 PM
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post #7 of 17 (permalink) Old 03-20-2019, 12:59 AM Thread Starter
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I think I am doing the right thing spraying the inside, because the oil should go on the air intake and not the air outlet (from the filter perspective). Please see how the filter configuration is in the T-Bird.
From manifold perspective, if you spray the oil on the outside of the filter, with the strong suction from the engine, particles from the oil will probably go into the intake manifold (which is what I think may have happened to my bike).

How is it possible that for both Harley and T-bird K&N filters, you spray the outside part when one sucks air from the internal side and the other does it from the external part of the filter? Not at all logical. I even believe K&N should clarify this on their filters.
The same applies for cleaning. If you are forcing water from the inside to outside in case of the T-Bird, you are actually helping dirt particles to get stuck (because dirt particles are trapped on the internal side). Whereas in Harleys, you force water from inside to outside because dirt particles accumulate on the external part.

But if it works for you guys, then good for you.
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post #8 of 17 (permalink) Old 03-20-2019, 01:34 PM
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You can use whatever logic you think justifies your theory, but the fact is, that you are supposed to spray the exterior of the filter. If you want to continue doing it your way.. then why bother asking for help in this forum. You are doing it the wrong way. This is a fact.
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post #9 of 17 (permalink) Old 03-21-2019, 01:54 AM Thread Starter
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Quote:
Originally Posted by joey1970 View Post
You can use whatever logic you think justifies your theory, but the fact is, that you are supposed to spray the exterior of the filter. If you want to continue doing it your way.. then why bother asking for help in this forum. You are doing it the wrong way. This is a fact.
Please note my original question was about cleaning the MAP Sensor not the K&N filter.
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post #10 of 17 (permalink) Old 03-25-2019, 01:39 AM
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Quote:
Originally Posted by sefri View Post
Please note my original question was about cleaning the MAP Sensor not the K&N filter.
serfi....you talking about the temp sensor sitting under the side cover which protrudes inside the air box or the 4 MAP sensors under the tank with the hose connections?
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