Mark 1 engine is racing
#1
![Default](/forum/images/icons/icon1.gif)
As I started my 1959 3.4 litre Mark 1 today the engine started racing at about 2,000 rpm. I drove it around a bit and the idling revs went up to 3,000 rpm when I came off the gas pedal. I adjusted the idle down to 1,000 rpm with the idling screws on the carburetors but as soon as I pushed the gas pedal the engine started racing again. Is this a problem with the gas pedal linkage or is it in the carburetors? Any advice would be most welcome.
#2
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,524
Received 1,481 Likes
on
1,152 Posts
The following users liked this post:
S-Type Owner (12-02-2022)
#3
The following users liked this post:
Glyn M Ruck (12-02-2022)
#4
![Default](/forum/images/icons/icon1.gif)
Thanks Glyn and Schmitty for your advice. I had neglected to reconnect the throttle return spring when I removed the air intake to change the spark plugs. Once reconnected, it runs very nicely. By the way, I found a complete 282 page shop manual for the car online at: https://jaguarrules.ru/wp-content/up...hop-Manual.pdf
Last edited by jrosenfeld; 12-02-2022 at 02:41 PM. Reason: typos
The following 2 users liked this post by jrosenfeld:
Glyn M Ruck (12-02-2022),
Schmitty (12-03-2022)
#5
The following users liked this post:
Glyn M Ruck (12-03-2022)
#6
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,524
Received 1,481 Likes
on
1,152 Posts
![Default](/forum/images/icons/icon1.gif)
Thanks Glyn and Schmitty for your advice. I had neglected to reconnect the throttle return spring when I removed the air intake to change the spark plugs. Once reconnected, it runs very nicely. By the way, I found a complete 282 page shop manual for the car online at: https://jaguarrules.ru/wp-content/up...hop-Manual.pdf
3.4 only ~ remember there are 2 throttle return springs with SU carbs. 75 & 76. ~ 2.4 had Solex carbs until 240 arrived.
![](https://cimg6.ibsrv.net/gimg/www.jaguarforums.com-vbulletin/425x206/carbs1_f1e00828f94f2d40a87c604e7ac4d8cb04fae38c.jpg)
Last edited by Glyn M Ruck; 12-03-2022 at 05:08 AM.
#7
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,524
Received 1,481 Likes
on
1,152 Posts
![Default](/forum/images/icons/icon1.gif)
Thank you Schmitty
Trending Topics
#8
The following users liked this post:
Glyn M Ruck (12-02-2022)
#9
#10
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,524
Received 1,481 Likes
on
1,152 Posts
#12
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 5,524
Received 1,481 Likes
on
1,152 Posts
Thread
Thread Starter
Forum
Replies
Last Post
l3uddha
XJ XJ6 / XJR6 ( X300 )
18
08-11-2014 09:19 PM
MLRocafella85
XJ XJ6 / XJR6 ( X300 )
2
06-22-2011 11:20 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)