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SORN
by OldSkrote - 31/07/25 02:07 PM
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Forums34
Topics48,376
Posts813,550
Members9,215
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Most Online1,046
Aug 24th, 2023
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There are no members with birthdays on this day. |
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Joined: Jun 2015
Posts: 1,961 Likes: 43
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Jun 2015
Posts: 1,961 Likes: 43 |
I had the exact same problem after a dealer fitted the cam belt upgrade. They had not fitted the pulley woodruff key correctly.  In which case, I guess the timing marks may still line up? Only proven by checking piston position at the same time?
Doug
2011 Plus 4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
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Joined: Jan 2022
Posts: 62
Just Getting Started
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OP
Just Getting Started
Joined: Jan 2022
Posts: 62 |
Timing holes in back plate look to to be aligned with both sprockets, I think I am going to presume all is ok and is normal to have different sounding exhausts
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Joined: Feb 2018
Posts: 762 Likes: 23
Talk Morgan Regular
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Talk Morgan Regular
Joined: Feb 2018
Posts: 762 Likes: 23 |
Does anyone with the uprated cams have this same (different L to R) characteristic?
Steve
Late 2012 M3W
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Joined: Feb 2019
Posts: 3,854 Likes: 2
Talk Morgan Addict
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Talk Morgan Addict
Joined: Feb 2019
Posts: 3,854 Likes: 2 |
The only time mine has spit and popped and ran rough was when I had the belt slipped by one notch. Took it apart, realigned the belt and all runs well.
The light at the end of the tunnel is actually a train. 2019 M3W
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Joined: Jun 2012
Posts: 2,142 Likes: 44
Talk Morgan Expert
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Talk Morgan Expert
Joined: Jun 2012
Posts: 2,142 Likes: 44 |
This seems to be quite common on M3W's and has been mentioned on here before. The LH cyclinder seems to run with a steady beat but the RH one fluffs a bit. If you cup your hand over the end of the exhausts, at idle, you can usually feel the slight difference. It seems to be more pronounced with G56 exhausts. I wouldn't say it was a problem, more of a "feature". Not sure why they do this but the fuel maps for LH and RH (front and rear) cylinders are not exactly the same if you have a look on Protune 2.
As for the starting, a good quality battery, plenty listed in the Alternative Parts List, and good condition plugs and leads should improve matters but they rarely spring into life at the first touch of the button.
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Joined: Feb 2016
Posts: 775 Likes: 33
Talk Morgan Regular
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Talk Morgan Regular
Joined: Feb 2016
Posts: 775 Likes: 33 |
I have a 2015 M3W. The exhaust note on the right has never been as robust as the left as previously described. This has remained even with stage 2 cams, new cam belt, stage 2 ECU, Morgan Aero Racing Stage 1 exhaust pipes, and removing the anterior baffle and modifying the posterior baffle of the stock pipes. I too wondered what was wrong with my M3W when I noticed this. Now believe it must be a consequence of some engine design characteristic.
Last edited by Sportster; 29/01/22 02:49 PM.
2015 M3W, Morgan Aero Racing Stage 1, Garage 56 Stage 2, sport black, saddle tan, jeweled SS dash.
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Joined: Nov 2011
Posts: 7,076 Likes: 21
Talk Morgan Guru
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Talk Morgan Guru
Joined: Nov 2011
Posts: 7,076 Likes: 21 |
Hi, I am a new owner and new to the forum and am looking for some advice.
I have noticed if I stand behind the car the exhaust sound is different LH to RH, the left is more Pop Pop the right Puff Puff, is this normal?
I also have trouble starting it, engine turns and turns until eventually coughs and fires but not before 20 seconds or so even with the foot on the clutch to relieve some resistance, no throttle used and I let the fuel pump stop
Hope somebody can help reassure me or identify if it is a problem
Thanks
"They all do that Sir....." 
A Morgan Identified Fastidious Owner...
2011 4/4 Bespoke, 1981 Delorean, Auburn Boat Tail
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Joined: Oct 2014
Posts: 5,016 Likes: 3
Charter Member
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Charter Member
Joined: Oct 2014
Posts: 5,016 Likes: 3 |
For starting in the very cold after a few days rest I did use a starter spray. (Many say that is a no-go)
Under standard conditions I always turned the key to the stage for fuel pump noise, turned back and repeated the procedure a second time before turning to start position. It helped a lot for better starting
Hannes
once: Green M3W; 2013
now: Red 4/4 Sport; 2011
and some practical cars for use in real life
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Joined: Jan 2022
Posts: 62
Just Getting Started
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OP
Just Getting Started
Joined: Jan 2022
Posts: 62 |
Then I shall put my coat on, drive, not worry and enjoy
Thanks
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Joined: Aug 2019
Posts: 286 Likes: 3
Learner Plates Off!
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Learner Plates Off!
Joined: Aug 2019
Posts: 286 Likes: 3 |
Mine is slower to start when it has not been driven for more than about a week. My best guess would be the cause is the oil from the cold-sumping getting ingested into the cylinders on first turn-over. It always starts after 20 seconds or so, runs fine, and then re-starts quickly.
Changing to a battery with higher CCA than the factory Banner makes the starter motor turn over (and the engine start) noticeably faster.
2020 M3W
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