 bump in the road, engine missing |
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| hookrah |
 Jul 26 2011, 03:58 PM
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#1
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Newbie  Group: Members Posts: 2 Joined: 2-August 10 From: Wa. Member No.: 12,005 Region Association: None  |
My 73 2.0L starts and runs perfect with the exception of an occasional "bump" or a series of "bumps" as I move the throttle slightly either way. It doesn't feel like electrical as it's more of a soft miss. I have checked the hoses, timing adjustments and such. What is weird is that it will sometimes run a long time without a hitch. So I was just wondering if anyone has felt something like this and been able to pin it down.
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| Cupomeat |
Jul 26 2011, 04:02 PM
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missing my NY 914 in VA Group: Members Posts: 1,336 Joined: 26-November 07 From: Oakton VA Member No.: 8,376 Region Association: MidAtlantic Region |
Normally if the engine is missing after a bump in the road, it means that your motor mounts were very loose... (IMG:style_emoticons/default/lol-2.gif)
Seriously, So it has uneven throttle progression with occasional misses? Are the misses at the same RPM or throttle position? Perhaps the MPS is sticking? (If this were an L-Jet, it would be an easy answer). Good luck! |
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| SirAndy |
Jul 26 2011, 04:02 PM
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#3
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Resident German Group: Admin Posts: 41,639 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(hookrah @ Jul 26 2011, 02:58 PM)  My 73 2.0L starts and runs perfect with the exception of an occasional "bump" or a series of "bumps" as I move the throttle slightly either way. It doesn't feel like electrical as it's more of a soft miss. I have checked the hoses, timing adjustments and such. What is weird is that it will sometimes run a long time without a hitch. So I was just wondering if anyone has felt something like this and been able to pin it down. Could be fuel delivery. When was the last time you replaced your fuel filter? Does the bottom of the tank have rust in it? Stock FI or Carbs? (IMG:style_emoticons/default/idea.gif) PS: (IMG:style_emoticons/default/welcome.png) |
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| 76-914 |
Jul 26 2011, 04:24 PM
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#4
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,502 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California 
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TPS ?
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| Valy |
Jul 26 2011, 05:00 PM
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#5
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Senior Member Group: Members Posts: 1,675 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
Check your front engine mounts.
PIA to replace but that's probably what you'll need to do. The right mount is a real challenge. You;ll hear people suggesting that you remove the oil filter to get access. I removed the mount support from the engine and think its much easier this way. |
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| johannes |
Jul 27 2011, 12:32 PM
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#6
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Club Porsche 914 France President Group: Members Posts: 3,084 Joined: 13-January 06 From: France Member No.: 5,409 Region Association: France |
Had this. Was a loose battery connection.
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