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- - Rpm Surging at idle (https://www.miataturbo.net/general-miata-chat-9/rpm-surging-idle-48846/)

Cryswht93N/A

06-23-2010 07:59 AM

Rpm Surging at idle

So i sold my MS PnP and went back to my stock ecu,as well as the bocsh tps sensor and replaced it with the original. Now when i come to a stop the idle will sometimes drop to close to 600 maybe 500 rpms then back up to 1100 a few times then settle at 900 where i have it set. Its wierd it doesnt do it all the time, ive been searching for the problem for a few days now. Any ideas?

lordrigamus

06-23-2010 08:02 AM

Did you plug or remove the old PnP signal line? Maybe a vacuum leak?

dustinb

06-23-2010 10:52 AM

Sounds like a vacuum leak.

fooger03

06-23-2010 12:20 PM

TEN+GND and set base idle

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