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Sold
by simon8201 - 09/09/26 01:46 PM
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Wales
by Joske Vermeule, September 1
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Forums39
Topics49,897
Posts838,017
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Most Online1,063
Jun 14th, 2026
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Joined: Nov 2013
Posts: 17
New to Talk Morgan
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OP
New to Talk Morgan
Joined: Nov 2013
Posts: 17 |
1988 4/4 1.6L CVH with the smaller 28/32 Weber.
Upon starting off or just giving it the gas with the bonnet up, the motor bogs down before catching and moving on. If this were my TR powered +4 I would say the SU carbs need dashpot oil. finally have the ignition time corrected and new plugs. Rebuilt the Weber with a new accelerator pump, appears to be working all well.
Are there any adjustments I am missing?
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Joined: Nov 2018
Posts: 6,675 Likes: 441
Talk Morgan Sage
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Talk Morgan Sage
Joined: Nov 2018
Posts: 6,675 Likes: 441 |
Manual or electric fuel pump? Float height set right? Secondary idle jet blocked? Just initial thoughts......
"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10
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Joined: Nov 2013
Posts: 17
New to Talk Morgan
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New to Talk Morgan
Joined: Nov 2013
Posts: 17 |
Manual fuel pump.
Float height set correct at rebuild, no starvation at high RPM under acceleration loads so I don't think that's an issue.
Need to check the idle jet, should be clear but........
Thanks,
Bill
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Joined: Nov 2018
Posts: 6,675 Likes: 441
Talk Morgan Sage
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Talk Morgan Sage
Joined: Nov 2018
Posts: 6,675 Likes: 441 |
May be a lazy pump, when the engines on full chat it's providing enough juice, but at lower revs, may not be pumping enough?
"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10
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Joined: Aug 2010
Posts: 5,468 Likes: 172
Charter Member
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Charter Member
Joined: Aug 2010
Posts: 5,468 Likes: 172 |
Is it possible to transpose the jets when rebuilding?
The reason I ask is that my CVH engined car had similar symptoms after I swapped to a higher flow air filter than standard. The fix (by Mike Duncan) was to change the jets. I cannot remember any of the details now (15 years later).
Paul
Costock, UK
Plus Four 75th - Furka Rouge - Pip
Disco 5
Teddy - 17h1 Irish Draught cross
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Joined: Feb 2016
Posts: 8,696 Likes: 416
Needs to Get Out More!
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Needs to Get Out More!
Joined: Feb 2016
Posts: 8,696 Likes: 416 |
Title suggests terminal aviation issue  
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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Joined: Nov 2013
Posts: 17
New to Talk Morgan
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New to Talk Morgan
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Problem Solved:
It was the fuel passage between the pump and the venturi; reamed it clean with some wire and now all is good!
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Joined: Jul 2007
Posts: 27,838 Likes: 764
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 27,838 Likes: 764 |
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Jan 2023
Posts: 1,031 Likes: 120
Has a lot to Say!
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Has a lot to Say!
Joined: Jan 2023
Posts: 1,031 Likes: 120 |
Maybe check the hose/s something is blocking things up. could be debris in the tank and or dodgy fuel filter more likely the rubber fuel hose and down to E10 fuel breaking it down.
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