Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 22nd March 2017, 12:12   #1
Ravinder
This is my second home
 
Ravinder's Avatar
 
Rover 75 saloon x2, Rover 75 Tourer x2, Rover 220 Coupe Turbo

Join Date: Aug 2010
Location: Kirkcaldy, Fife
Posts: 9,036
Thanks: 2,278
Thanked 2,852 Times in 1,718 Posts
Default Misfire/hesitation on 1.8T

Hi guys

I've got a slight misfire or hesitation under load, around 3k refs on the 1.8 turbo 75. I will be getting the car on the T4 very soon hoping it will tell me the issue. Any ideas here what to look for? Many thanks.
__________________
Wanted - Indian bride. Cash waiting. (All sorted - bargain)





First name and forum name: Ravinder

Rover 75 2.0 CDT Connoisseur SE 116 (160 remap)
Royal Blue (JFM)

This vehicle was the 50,481st 75 to run off the production line, out of 112,381
This vehicle was the 2,238th 75 CDT Connoisseur SE to be made out of 3,775
This vehicle was the 5,002nd 75 in Royal Blue (code: JFM) to be made out of 14,420 Royal Blue 75s
Ravinder is offline   Reply With Quote
Old 22nd March 2017, 12:20   #2
T-Cut
This is my second home
 
Rover75 and Mreg Corsa.

Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,751
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
Default

Reducing the spark plug gaps to 0.5-0.7mm is reckoned to help with this.

TC
T-Cut is offline   Reply With Quote
Old 22nd March 2017, 12:26   #3
Ravinder
This is my second home
 
Ravinder's Avatar
 
Rover 75 saloon x2, Rover 75 Tourer x2, Rover 220 Coupe Turbo

Join Date: Aug 2010
Location: Kirkcaldy, Fife
Posts: 9,036
Thanks: 2,278
Thanked 2,852 Times in 1,718 Posts
Default

Ok, thanks. Sounds daft, but how do you measure the gaps?
__________________
Wanted - Indian bride. Cash waiting. (All sorted - bargain)





First name and forum name: Ravinder

Rover 75 2.0 CDT Connoisseur SE 116 (160 remap)
Royal Blue (JFM)

This vehicle was the 50,481st 75 to run off the production line, out of 112,381
This vehicle was the 2,238th 75 CDT Connoisseur SE to be made out of 3,775
This vehicle was the 5,002nd 75 in Royal Blue (code: JFM) to be made out of 14,420 Royal Blue 75s
Ravinder is offline   Reply With Quote
Old 22nd March 2017, 12:33   #4
suzublu
This is my second home
 
suzublu's Avatar
 
rover 75 1.8 vvc club se wedgwood blue

Join Date: Aug 2009
Location: Seaton Carew
Posts: 26,880
Thanks: 65
Thanked 7,142 Times in 4,642 Posts
Default

With a feeler gauge or the thickness of your thumbnail
suzublu is offline   Reply With Quote
Old 22nd March 2017, 12:38   #5
Arryhall
Loves to post
 
Rover 75

Join Date: Mar 2017
Location: Biddulph
Posts: 486
Thanks: 101
Thanked 145 Times in 90 Posts
Default

Quote:
Originally Posted by Ravinder View Post
Hi guys

I've got a slight misfire or hesitation under load, around 3k refs on the 1.8 turbo 75. I will be getting the car on the T4 very soon hoping it will tell me the issue. Any ideas here what to look for? Many thanks.
No idea, but I have the exact same thing. It's going into the garage under warranty on Friday, but this may help meantime:

http://www.the75andztclub.co.uk/foru...d.php?t=263446
Arryhall is offline   Reply With Quote
Old 22nd March 2017, 14:20   #6
T-Cut
This is my second home
 
Rover75 and Mreg Corsa.

Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,751
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
Default

Quote:
Originally Posted by Ravinder View Post
Ok, thanks. Sounds daft, but how do you measure the gaps?
This gap should be 0.5 to 0.7mm



You need a set of feeler gauges or a similar gap measuring tool.



And you make the gap the required size by very carefully moving the outer electrode. That's the bent bit in the first picture.

The appropriate feeler blade should just slide through the gap with a slight resistance felt.



TC
T-Cut is offline   Reply With Quote
Old 22nd March 2017, 15:29   #7
doopydug
Posted a thing or two
 
Rover 75 Saloon

Join Date: Nov 2013
Location: Fife
Posts: 1,595
Thanks: 88
Thanked 269 Times in 235 Posts
Default

Yeah - nearly always the plug gap - mine did the same Rav - easily sorted
doopydug is offline   Reply With Quote
Old 22nd March 2017, 18:40   #8
Ravinder
This is my second home
 
Ravinder's Avatar
 
Rover 75 saloon x2, Rover 75 Tourer x2, Rover 220 Coupe Turbo

Join Date: Aug 2010
Location: Kirkcaldy, Fife
Posts: 9,036
Thanks: 2,278
Thanked 2,852 Times in 1,718 Posts
Default

Many thanks everyone. Will attend to if this week.
__________________
Wanted - Indian bride. Cash waiting. (All sorted - bargain)





First name and forum name: Ravinder

Rover 75 2.0 CDT Connoisseur SE 116 (160 remap)
Royal Blue (JFM)

This vehicle was the 50,481st 75 to run off the production line, out of 112,381
This vehicle was the 2,238th 75 CDT Connoisseur SE to be made out of 3,775
This vehicle was the 5,002nd 75 in Royal Blue (code: JFM) to be made out of 14,420 Royal Blue 75s
Ravinder is offline   Reply With Quote
Old 22nd March 2017, 20:28   #9
Yorkshire GOC
I really should get out more.......
 
Yorkshire GOC's Avatar
 
Rover 75 connoisseur se v6 auto

Join Date: May 2014
Location: Hull
Posts: 2,058
Thanks: 1,842
Thanked 623 Times in 469 Posts
Default

On my car with those exact same symptoms it was a failing ignition coil - all carbonised up.
__________________
She came off the Longbridge Line on 20-05-2003

The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.
Yorkshire GOC is offline   Reply With Quote
Old 22nd March 2017, 20:39   #10
kaiser
This is my second home
 
kaiser's Avatar
 
75 Tourer 2.5 Auto, 1.8T, 75V8ZT

Join Date: Jun 2007
Location: Johannesburg ZA
Posts: 6,200
Thanks: 1
Thanked 859 Times in 613 Posts
Default

Quote:
Originally Posted by Yorkshire GOC View Post
On my car with those exact same symptoms it was a failing ignition coil - all carbonised up.
??.............
__________________
Worth his V8 in gold
kaiser is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 20:28.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd