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Author Topic: MV6 Idling Higer after ported throttle bodies?  (Read 590 times)

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AngelGrinder

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MV6 Idling Higer after ported throttle bodies?
« on: 22 February 2011, 18:03:30 »
Hi all, fitted some ported throttle bodies which I bought a few years ago, for an older MV6 I had. I'm heading up to Santa Pod this weekend, to have a race between a friend who has a 3.2 Vectra....so I think I'm going to need all the power I can get.

The car definately feels better to drive, but it's now idling like it's on constant choke, around 2k rpm. Earlier, when I gave it alot of throttle in 2nd/3rd it sort of lost power for a few seconds, as though the TC kicked in (I had it switched off at that moment). It seems to have stopped this now though! The butterflys definately closed fully, and are definately returning. The only thing I noticed, is the throttle bodies I took off, had a black cover over where the cable ball joint meets and the cable was 'ontop' of the unit if that makes sense? The one I replaced it with, is the other way round, it pulls it from the bottom. I don't know if this makes sense, I can try and get pics if it would help! Any advice or tips would be great! Cheers!
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Kevin Wood

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Re: MV6 Idling Higer after ported throttle bodies?
« Reply #1 on: 22 February 2011, 18:24:05 »
Are you sure the throttle is sealing properly? It doesn't take much air to lift the idle speed.

Another thought. The throttle spindle is rotating the opposite way. I wonder if the throttle position sensor is wired differently to compensate?

Kevin
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AngelGrinder

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Re: MV6 Idling Higer after ported throttle bodies?
« Reply #2 on: 23 February 2011, 09:59:43 »
The throttle position sensor sounds a good idea, I'll swap them over. Otherwise, is there a way to manually adjust the idle? Do the throttle bodies have a gasket or anything to the plenum? Maybe it's not sealing there?
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YZ250

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Re: MV6 Idling Higer after ported throttle bodies?
« Reply #3 on: 23 February 2011, 10:04:56 »
Quote
The throttle position sensor sounds a good idea, I'll swap them over. Otherwise, is there a way to manually adjust the idle? Do the throttle bodies have a gasket or anything to the plenum? Maybe it's not sealing there?


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« Last Edit: 23 February 2011, 10:21:01 by Alan-Hearn »
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