Click here to return to the home page.
Morgan 3 Wheeler
Who's Online Now
2 registered members (Barkbark, CraigL), 51 guests, and 35 spiders.
Key: Admin, Global Mod, Mod
Top Posters(30 Days)
+8Rich 149
John V6 136
OZ 4/4 121
Alistair 104
Newest Members
05 Roadster, John Tromans, Factotum, Dave Jones, Fester
8159 Registered Users
Newest Topics
Spark Plug Wires
by PaulyG. 09/12/22 04:47 PM
Jet Black
by lowebird. 09/12/22 03:01 PM
It is crowded up there
by John V6. 09/12/22 01:52 PM
Autocar YouTube
by ProfessorM. 09/12/22 01:43 PM
M3W oil pressure switch
by planenut. 09/12/22 12:02 PM
Shed Racing vid
by Luddite. 08/12/22 04:23 PM
New Morgan Pedal Car - Kettcar
by flyfisher. 08/12/22 03:42 PM
Latest Photos
Cover Girl_MOG414
Under the clouds....
Ms Marple's island/s connection...
Autumn Sunshine
Back Onshore
Forum Statistics
Forums34
Topics44,401
Posts750,323
Members8,159
Most Online1,033
Dec 28th, 2019
Today's Birthdays
346VAB, Dannywk
Previous Thread
Next Thread
Print Thread
Page 2 of 10 1 2 3 4 9 10
Re: Revs not going to idle [Re: donaldosaurus] #660290
04/09/20 01:12 PM
04/09/20 01:12 PM
Joined: Apr 2012
Posts: 1,640
Dumfries and Galloway
donaldosaurus Offline OP
Talk Morgan Enthusiast
donaldosaurus  Offline OP
Talk Morgan Enthusiast

Joined: Apr 2012
Posts: 1,640
Dumfries and Galloway
Could well be, car has sat for a year or so before I got it. Raining now but not for long I hope. Now when weather is nice I’m cycling 300 miles this month for Cancer Research . Fundraising going well but sore ar5e!!

https://fundraise.cancerresearchuk.org/page/ians-cycle-300-fundraising-page-171

Raffling a 4.5 litre bottle of Really Big Peat too.


2022 Plus Four, Range Rover Vogue SDV8, Lotus Elan.
Re: Revs not going to idle [Re: donaldosaurus] #745101
19/06/22 02:04 AM
19/06/22 02:04 AM
Joined: Apr 2021
Posts: 45
Australia
PaulM3W Offline
Just Getting Started
PaulM3W  Offline
Just Getting Started

Joined: Apr 2021
Posts: 45
Australia
Hey all, similar issue at the moment, rpm remains high during gear changes and on stopping sometimes takes time for rpm to decay to idle. Definitely worse when engine is hot. (Ambient temp was 14 degrees C so not exactly a hot day!) Throttle cable moving freely, hard to tell if the butterfly is sticking while driving but when moved by pressing with my thumb it returns strongly to the closed position...I have cleaned the idle air control valve which was gunky and still has some baked on black stuff that has not wiped off. Will see how the next drive goes...


M3W 2017 RAF blue.
Re: Revs not going to idle [Re: donaldosaurus] #745167
19/06/22 06:51 PM
19/06/22 06:51 PM
Joined: Apr 2013
Posts: 1,301
Southern Vermont
Michael H Offline
Has a lot to Say!
Michael H  Offline
Has a lot to Say!

Joined: Apr 2013
Posts: 1,301
Southern Vermont
This happened to me last year. The spring behind the gas pedal broke. The spring at the top of the motor is not strong enough to do the job itself. I replaced the. lower spring with a 'close enough' spring and life resumed like normal. It is a pain to do as you have to go through the access hole above the assembly and hope your wrist and fingers are flexible and strong enough to do the job.


What's your mileage? Who cares. Is it practical? See #1. What happens when it rains? You get wet.
Re: Revs not going to idle [Re: donaldosaurus] #745659
24/06/22 03:55 AM
24/06/22 03:55 AM
Joined: May 2019
Posts: 56
B
Bluebricked Offline
Just Getting Started
Bluebricked  Offline
Just Getting Started
B

Joined: May 2019
Posts: 56
I have been chasing a similar problem for a while. The engine sometimes took some time to return to idle at a stop and between shifts things could get lumpy as the engine hunted around for what RPM it really wanted to be at. Finally found the right guy who was a former S&S-sponsored racer who said my TPS (Throttle Position Sensor) needed to be adjusted. He manually adjusted the sensor while watching the readouts on the S&S software and my car is back to a perfect tune. I guess there are throttle stops that wear over time and can throw things kind of out of wack. You can't visually confirm anything is worn, because the throttle snapped back and close perfectly. Except my RPMs were not decaying to an idle and RPMs sometimes remained high between shifts. Hope this helps.

Re: Revs not going to idle [Re: Bluebricked] #745706
24/06/22 01:40 PM
24/06/22 01:40 PM
Joined: Feb 2019
Posts: 3,694
Port Orchard, WA.
LightSpeed Offline
Talk Morgan Addict
LightSpeed  Offline
Talk Morgan Addict

Joined: Feb 2019
Posts: 3,694
Port Orchard, WA.
Originally Posted by Bluebricked
I have been chasing a similar problem for a while. The engine sometimes took some time to return to idle at a stop and between shifts things could get lumpy as the engine hunted around for what RPM it really wanted to be at. Finally found the right guy who was a former S&S-sponsored racer who said my TPS (Throttle Position Sensor) needed to be adjusted. He manually adjusted the sensor while watching the readouts on the S&S software and my car is back to a perfect tune. I guess there are throttle stops that wear over time and can throw things kind of out of wack. You can't visually confirm anything is worn, because the throttle snapped back and close perfectly. Except my RPMs were not decaying to an idle and RPMs sometimes remained high between shifts. Hope this helps.


Good info to know.


The light at the end of the tunnel is actually a train. 2019 M3W

Re: Revs not going to idle [Re: donaldosaurus] #745775
25/06/22 02:40 AM
25/06/22 02:40 AM
Joined: Apr 2021
Posts: 45
Australia
PaulM3W Offline
Just Getting Started
PaulM3W  Offline
Just Getting Started

Joined: Apr 2021
Posts: 45
Australia
Hey all,
Results of my rest drive were very pleasing. After cleaning the gunk off the idle air control valve rpm decay is normal again! I actually noticed that I had slowly been adjusting my driving to compensate for the slow rpm decay, I am back to blipping the throttle on gear changes!


M3W 2017 RAF blue.
Re: Revs not going to idle [Re: donaldosaurus] #745811
25/06/22 09:30 AM
25/06/22 09:30 AM
Joined: Aug 2013
Posts: 1,547
Cheshire, UK
nippymog Offline
Talk Morgan Enthusiast
nippymog  Offline
Talk Morgan Enthusiast

Joined: Aug 2013
Posts: 1,547
Cheshire, UK
Could you describe or have a picture of where the idle air control valve is please?
Sorry , it is described clearly above doh
I must read posts properly !

Last edited by nippymog; 25/06/22 09:31 AM.
Re: Revs not going to idle [Re: donaldosaurus] #746754
03/07/22 02:40 PM
03/07/22 02:40 PM
Joined: Aug 2013
Posts: 1,547
Cheshire, UK
nippymog Offline
Talk Morgan Enthusiast
nippymog  Offline
Talk Morgan Enthusiast

Joined: Aug 2013
Posts: 1,547
Cheshire, UK
I also have occasional slow return to idle, and have just got round to checking it.
I have checked the throttle linkage etc and all seems ok , so I want to check the Idle Air control described above as being on top of the throttle body.

Is it this ?

[Linked Image]

If so what do I clean? it all seems clean to me !

[Linked Image]

Thanks

Re: Revs not going to idle [Re: nippymog] #746755
03/07/22 02:58 PM
03/07/22 02:58 PM
Joined: Mar 2013
Posts: 1,010
Guildford, UK
R1NGA Offline
Has a lot to Say!
R1NGA  Offline
Has a lot to Say!

Joined: Mar 2013
Posts: 1,010
Guildford, UK
That is indeed the ICV. Not easy to clean, but I use aresol Carb Cleaner to blast stuff out. Be careful not to try to dismantle as the plunger is under spring pressure and if it fires off you mauy never see it again. Also clean the inside of the plenum/inlet manifold to clear gunt too.

Re: Revs not going to idle [Re: donaldosaurus] #746756
03/07/22 03:17 PM
03/07/22 03:17 PM
Joined: Feb 2019
Posts: 3,694
Port Orchard, WA.
LightSpeed Offline
Talk Morgan Addict
LightSpeed  Offline
Talk Morgan Addict

Joined: Feb 2019
Posts: 3,694
Port Orchard, WA.
The cam chest puking oil up into the throttle body sure does not help keep that clean.


The light at the end of the tunnel is actually a train. 2019 M3W

Page 2 of 10 1 2 3 4 9 10

Moderated by  TalkMorgan 

Powered by UBB.threads™ PHP Forum Software 7.7.1