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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > Map reading 1.4 PSI at idle??
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      04-21-2019, 08:03 PM   #1
Blackhawkup
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Map reading 1.4 PSI at idle??

At idle, my JB4 is reading 1.4 psi. Would this be from a faulty map sensor? If so can the map sensor be cleaned? Could this be from the JB4?

Can runs great, no issues. Just seems odd that the car would produce boost at idle.


Thank you
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      04-23-2019, 06:09 AM   #2
Floriduh235
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I hosed mine down with MAF cleaner last week and it is working fine. So I would say it is worth a shot.
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      04-23-2019, 07:44 AM   #3
Blackhawkup
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Quote:
Originally Posted by Floriduh235 View Post
I hosed mine down with MAF cleaner last week and it is working fine. So I would say it is worth a shot.

Thank you.. I cleaned mine off with WD40 and it now shows 0.0 to 0.2 at idle. I think I need to clean it up again.
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      04-23-2019, 08:28 AM   #4
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Quote:
Originally Posted by Blackhawkup View Post
Thank you.. I cleaned mine off with WD40 and it now shows 0.0 to 0.2 at idle. I think I need to clean it up again.
For sure DO NOT use WD-40 !!!!!!

Use MAF cleaner or an electronic contact cleaner.
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      04-24-2019, 05:50 AM   #5
DreamerJoe
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Quote:
Originally Posted by SilkySmoooth View Post
Quote:
Originally Posted by Blackhawkup View Post
Thank you.. I cleaned mine off with WD40 and it now shows 0.0 to 0.2 at idle. I think I need to clean it up again.
For sure DO NOT use WD-40 !!!!!!

Use MAF cleaner or an electronic contact cleaner.
but WD-40 works for everything! lol, jk.

for sure don't use WD-40, use MAF cleaner.
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