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Aug 24th, 2023
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Joined: Mar 2007
Posts: 2,030 Likes: 10
Sir S1'a'lot Talk Morgan Expert
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Sir S1'a'lot Talk Morgan Expert
Joined: Mar 2007
Posts: 2,030 Likes: 10 |
My 2000 ticks over too height I think. 1100-1200rpm
2002 Aero 8 S1
2023 Plus 4 (woman’s)
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Joined: Dec 2009
Posts: 35,773 Likes: 468
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
Joined: Dec 2009
Posts: 35,773 Likes: 468 |
Mine ticks over at 750 - 800 rpm.
But around 1,100rpm when cold and warming up.
It's a 3.9 unmodified Hotwire.
2009 4/4 Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Connaught Green +8 prev
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Joined: Sep 2014
Posts: 2,272 Likes: 7
Talk Morgan Expert
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Talk Morgan Expert
Joined: Sep 2014
Posts: 2,272 Likes: 7 |
Thanks, but I followed Librands instructions and fitting them didn't change the stalling situation at all. IF you have fitted the "newer" type of Librands manifolds where each bank exits through the chassis on the same side , then you don't need to swap over the wiring loom between the sensors. If you have the older "crossover" type where the pipes do cross over under the sump , then the wiring swap is essential. My twopenneth , for what it is worth, is to check for air leaks in the manifolds, junctions, and mating surfaces very throughly. as this will definitely effect the idle speed. The quickest way to check the air mass sensor is to swap it with a known good one , which can be challenging to arrange, but ask here nicely and someone might be near enough to you. Good luck
Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.
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Joined: Dec 2017
Posts: 2,040 Likes: 71
Talk Morgan Expert
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Talk Morgan Expert
Joined: Dec 2017
Posts: 2,040 Likes: 71 |
Mine ticks over at 750 - 800 rpm.
But around 1,100rpm when cold and warming up.
It's a 3.9 unmodified Hotwire. Richard; 750-800 rpm is the correct idle 1100-1200 is way too high, mine is at 900 rpm because I have the Tornado Chip installed.
Bruce
1964 4/4 Series V Comp (Megan)
1994 +8 (Maurice)
2013 M3W (Olga)
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Joined: Dec 2009
Posts: 35,773 Likes: 468
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
Joined: Dec 2009
Posts: 35,773 Likes: 468 |
Mine ticks over at 750 - 800 rpm.
But around 1,100rpm when cold and warming up.
It's a 3.9 unmodified Hotwire. Richard; 750-800 rpm is the correct idle 1100-1200 is way too high, mine is at 900 rpm because I have the Tornado Chip installed. Bruce, thanks for confirming the idle revs, it sounds right there whereas when the engine is cold it's racing a bit to me at the higher revs. I hadn't appreciated that the Tornado required a higher tick over either, every day is a school day.
2009 4/4 Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Connaught Green +8 prev
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Joined: Aug 2020
Posts: 42
Just Getting Started
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OP
Just Getting Started
Joined: Aug 2020
Posts: 42 |
Thanks. My Librands do not cross over.
Tick over is correct for about 1 minute then just stops as if it has been switched off.
Lifes motors tried a known good MAF sensor and ECU..
Last edited by Phil+8; 29/11/20 09:10 AM.
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Joined: Sep 2019
Posts: 102 Likes: 1
L - Learner Plates On
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L - Learner Plates On
Joined: Sep 2019
Posts: 102 Likes: 1 |
I had a problem on my 97 +4 so might not be relevant. It took me weeks to sort trying changes of sensors, ecu etc. In the end it was simple, the stepper motor drives a cam which acts on a brass pin which goes through the throttle body to act on the butterfly. This brass pin was sticking and after disassembly and a good clean my problems were solved.
Tim
Plus 4 2018
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Joined: Aug 2020
Posts: 42
Just Getting Started
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OP
Just Getting Started
Joined: Aug 2020
Posts: 42 |
Thanks Tim.
All roads seem to point to the stepper motor. I must look at it again.
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Joined: Jul 2007
Posts: 26,747 Likes: 419
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 26,747 Likes: 419 |
I am not sure if you have seen this but GoMog has lots of info. GomogOn my 97 +4 it was the ECU failing, but this is not the same ECU as yours.
JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger
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Joined: Apr 2010
Posts: 463
Learner Plates Off!
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Learner Plates Off!
Joined: Apr 2010
Posts: 463 |
Mine ticks over at 750 - 800 rpm too.
But around 1,100rpm when cold and warming up...
It's a 4.0L
Last edited by MGDave; 29/11/20 12:45 PM.
Dave
98 +8 Corsa Red
74 MGB Red
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