 Intermittent rough running, Any ideas? |
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| cal914 |
 Feb 17 2017, 06:52 AM
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#1
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Member  Group: Members Posts: 319 Joined: 12-April 12 From: United Kingdom Member No.: 14,366 Region Association: None  |
We have a 1970 1.7 running on dual carbs. It has recently developed an intermittent problem of rough running when it happens it feels it is running on just 2 cylinders, really rough with loss of power and fuel smell in the cab.
It happened the other morning when we drove it for about an hour and we then stopped for about an hour and it was fine when we re-started. Then the next week it came on and off for the first hour of the journey and then was fine. On Wednesday this week we took the 914 out on a good long run and it was fine both ways. Any ideas where to start looking for this problem? Thanks! Kate & Brian |
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Replies(1 - 3)
| BK911 |
Feb 17 2017, 09:34 AM
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#2
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Senior Member Group: Members Posts: 672 Joined: 19-February 04 From: Rocky Top, TN Member No.: 1,674 Region Association: None |
Spark plug wires.
Fuel filter Fuel sock in tank ??? |
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| Dave_Darling |
Feb 17 2017, 03:41 PM
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#3
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914 Idiot Group: Members Posts: 14,980 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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Check compression.
Check for fuel. Check for spark. Check for air leaks. Check the carb sync. Check for debris in the carbs. Check float adjustments and such. --DD |
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| stugray |
Feb 17 2017, 04:10 PM
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#4
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Advanced Member Group: Members Posts: 3,824 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
QUOTE(cal914 @ Feb 17 2017, 05:52 AM)  We have a 1970 1.7 running on dual carbs. It has recently developed an intermittent problem of rough running when it happens it feels it is running on just 2 cylinders, really rough with loss of power and fuel smell in the cab. It happened the other morning when we drove it for about an hour and we then stopped for about an hour and it was fine when we re-started. Then the next week it came on and off for the first hour of the journey and then was fine. On Wednesday this week we took the 914 out on a good long run and it was fine both ways. Any ideas where to start looking for this problem? Thanks! Kate & Brian Sounds to me like a stuck float or needle valve. that would cause one side to flood and not fire on those two cylinders. Pull out the dipstick and smell it. Do you smell gasoline? |
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