 Idle issues, anyone want to take a stab?, sound up |
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| nivekdodge |
 Oct 26 2023, 09:36 AM
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#1
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Member  Group: Members Posts: 250 Joined: 28-August 21 From: Pittsburgh Pa Member No.: 25,860 Region Association: MidAtlantic Region 
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https://www.youtube.com/shorts/P82FcOy9scY
914 with fresh 1.8 and 123 distributor. Idle jets were swapped around , no change. only seems to happen on #4. Notice the pooof in the barrel when it pops? Kevin |
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Replies(1 - 5)
| Superhawk996 |
Oct 26 2023, 10:24 AM
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#2
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914 Guru Group: Members Posts: 5,876 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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Timing and/or valve adjustment
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| rhodyguy |
Oct 26 2023, 10:53 AM
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#3
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,084 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
Use 1 idle speed adj screw to raise the idle a bit and remeasure the flow across all 4 Venturi. The other ISAS should be off the stop. Then report back with #s. At what rpm does the ‘sneeze’ cease?. What rpm is your idle set at?
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| brant |
Oct 26 2023, 03:42 PM
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#4
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914 Wizard Group: Members Posts: 11,632 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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I also have seen this if that cylinder is down on compression
Do you have recent compression testing numbers? |
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| nivekdodge |
Oct 26 2023, 05:59 PM
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#5
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Member Group: Members Posts: 250 Joined: 28-August 21 From: Pittsburgh Pa Member No.: 25,860 Region Association: MidAtlantic Region
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QUOTE(brant @ Oct 26 2023, 05:42 PM)  I also have seen this if that cylinder is down on compression Do you have recent compression testing numbers? 103 -116 Kevin |
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| nivekdodge |
Oct 26 2023, 06:00 PM
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#6
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Member Group: Members Posts: 250 Joined: 28-August 21 From: Pittsburgh Pa Member No.: 25,860 Region Association: MidAtlantic Region
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QUOTE(rhodyguy @ Oct 26 2023, 12:53 PM) Use 1 idle speed adj screw to raise the idle a bit and remeasure the flow across all 4 Venturi. The other ISAS should be off the stop. Then report back with #s. At what rpm does the ‘sneeze’ cease?. What rpm is your idle set at? idle around 900 airflow at 6 Kevin |
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