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> The plenum, What's under there?
Porschef
post Sep 15 2015, 07:01 PM
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Drove the car to work today and it's running very well. When I got home I wanted to check a couple things. Don't know why I did it, but the last thing was to spray some carb cleaner around to check for vacuum leaks. When I sprayed some under the plenum, she almost stalled out. Sumbitch! I thought I'd found all the vacuum leaks.

Question is, what's under the plenum that might allow it to suck air? Could there be a crack?

Great, gives me another excuse to wrench on the car. Also should allow me to lean it out a bit more at the AFM. It's L-jet, btw.

Any ideas?
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Posts in this topic
Porschef   The plenum   Sep 15 2015, 07:01 PM
76-914   Absotootly! It's just a metal box and they...   Sep 15 2015, 08:36 PM
r_towle   Aliens   Sep 15 2015, 08:41 PM
rick 918-S   Aliens I can reassure you there are no Aliens u...   Sep 15 2015, 08:48 PM
boxsterfan   Aliens I can reassure you there are no Aliens ...   Sep 15 2015, 09:19 PM
r_towle   Don't believe him, he was assimilated long ago...   Sep 15 2015, 08:49 PM
McMark   Yup, seen plenty of rusted out plenums.   Sep 15 2015, 09:22 PM
Porschef   Thanks gents, that'll give me plenum to do thi...   Sep 16 2015, 04:14 AM
Porschef   Looks fine. I don't know what was making it a...   Sep 17 2015, 05:50 PM
914_teener   Looks fine. I don't know what was making it ...   Sep 17 2015, 06:27 PM
Mike Bellis   Run some green locktite across the welded seam. Th...   Sep 17 2015, 07:14 PM
76-914   water or air test it.   Sep 17 2015, 07:19 PM
Porschef   Thanks guys. Mike, I thought about using RTV or s...   Sep 18 2015, 04:17 AM
falcor75   Check the gasket between the plenum and throttle b...   Sep 18 2015, 04:23 AM
Porschef   Check the gasket between the plenum and throttle ...   Sep 18 2015, 05:53 AM
RobW   Make sure you have your accelerator pedal stop int...   Sep 18 2015, 06:37 AM
Porschef   Rob, had your's split at the seam underneath?   Sep 18 2015, 10:40 AM
Porschef   Double post   Sep 18 2015, 10:42 AM
SirAndy   Check the trough-tubes on the plenum. Almost all c...   Sep 18 2015, 12:12 PM
RobW   Like Andy said. The plenum gets torqued by the thr...   Sep 18 2015, 01:52 PM
Porschef   Andy, it's a 2056 with Ljet. Should that matt...   Sep 18 2015, 02:00 PM
SirAndy   Andy, it's a 2056 with Ljet. Should that matt...   Sep 18 2015, 02:27 PM
Porschef   Ahh, ok. Danke   Sep 18 2015, 02:31 PM
RobW   Sorry. I've only owned 2.0s and burned 2 plenu...   Sep 18 2015, 02:34 PM
r_towle   See, it's aliens.   Sep 18 2015, 05:47 PM
Porschef   Uh, Rich, I'm starting to think you're rig...   Sep 18 2015, 06:49 PM
r_towle   It won't leak when you put it back together, t...   Sep 18 2015, 07:37 PM
Porschef   Ok, so, I put everything back together, started he...   Sep 19 2015, 12:10 PM


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