 Decel Valve and MPS Mounting |
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| cabrioartie |
 Jan 27 2026, 12:38 AM
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#1
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Newbie  Group: Members Posts: 12 Joined: 8-October 24 From: Las Vegas, NV Member No.: 28,400 Region Association: None 
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I'm currently in the process of replacing both the Decel Valve and MPS in my 74 2.0l and find the current items are mounted strangely (in my opinion) and I wanted to know if they were original mounted this way or did the PO change something.
Both the Decel Valve and MPS are held to the right side wall of the engine bay with the same bolt, this installation seems strange. Is this how they should be mounted? Or was it mounted wrong by the PO? And, what kind of bolts/screws should be holding these pieces on? Thank you |
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| chmillman |
Jan 27 2026, 01:52 AM
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#2
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Member Group: Members Posts: 321 Joined: 15-June 24 From: Switzerland Member No.: 28,183 Region Association: Europe
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The MPS has a bracket attached by 2 screws on the bottom with 3 slots. There are 3 special rubber grommets that have a metal sleeve inside that are slid into the slots and then screws go through them into a panel attached to the body. The attachment screws are I think regular 6mm metric machine screws that go into tinner's nuts. The idea was to provide a bit of shock insulation for the MPS which is sensitive. There is a thread on this.
http://www.914world.com/bbs2/index.php?sho...375765&st=0 You can find replacement grommets at a couple of suppliers, but a lot of cars seem to have improvised solutions... Not sure about the decel valve, but I don't think it is supposed to be mounted to the same bolts as the MPS. My car doesn't have one as it's a Euro-spec (GB) motor, not the same emission controls as USA models. |
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| cabrioartie |
Jan 27 2026, 01:34 PM
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#3
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Newbie Group: Members Posts: 12 Joined: 8-October 24 From: Las Vegas, NV Member No.: 28,400 Region Association: None
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Can anyone show me or tell me how the Decel Valve gets mounted. A picture would help a tremendous amount.
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| JeffBowlsby |
Jan 27 2026, 02:06 PM
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#4
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914 Wiring Harnesses & Beekeeper Group: Members Posts: 9,166 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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Those two items do share and mount at the top fastener of the MPS mounting plate. I don’t recall the exact fastener (not near my 914 at the moment), more importantly what fastener fits in the hole on your car? Is it a machine threaded screw or a sheet metal screw?
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| slapshot |
Jan 27 2026, 02:42 PM
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#5
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Member Group: Members Posts: 146 Joined: 11-June 23 From: Utah Member No.: 27,409 Region Association: Rocky Mountains
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Mine shares the top bolt as shown.
Attached image(s) 
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| cabrioartie |
Jan 27 2026, 03:11 PM
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#6
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Newbie Group: Members Posts: 12 Joined: 8-October 24 From: Las Vegas, NV Member No.: 28,400 Region Association: None
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QUOTE(JeffBowlsby @ Jan 27 2026, 12:06 PM)  Those two items do share and mount at the top fastener of the MPS mounting plate. I don’t recall the exact fastener (not near my 914 at the moment), more importantly what fastener fits in the hole on your car? Is it a machine threaded screw or a sheet metal screw? Just seems strange that they share the same mounting screw, but I needed to make sure as I install the new components. The top hole fits a M6 bolt, it appears there is a nut welded to the backside of the mount. The lower two holes do not have a nut, and I planned on putting a speed nut on the mount and using a sheetmetal screw. |
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| cabrioartie |
Jan 27 2026, 03:14 PM
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#7
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Newbie Group: Members Posts: 12 Joined: 8-October 24 From: Las Vegas, NV Member No.: 28,400 Region Association: None
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QUOTE(slapshot @ Jan 27 2026, 12:42 PM) Mine shares the top bolt as shown. Thank you, this is very helpful. |
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