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Costlyy

New Member

• Apr 14, 2012

• #1

Recently changed head gasket on my 2.5 petrol 90 d reg, bought it as a non-starter so this is the first time i've been able to drive it. Sat for about 6 months with the head off before.

It starts on the button when cold with the choke out and you can drive it around with the choke in but as soon as the engine speed drops (I.E. at traffic lights) the engine slowly stalls itself - always within about 5 seconds - with the choke in.

This happens when it's hot or cold.

Seems to me like a fuel problem, i believe it's a Weber carb?

Any ideas why this is happening?

 

martin1512

Well-Known Member

• Apr 14, 2012

• #2

Have you set the mixture & idle speed correctly? Does the engine misfire at all when accelerating? Does it backfire on the over run? Have you checked the timing?

 

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Costlyy

New Member

• Apr 14, 2012

• #3

Not sure how you set the mixture / idle speed. How can this be modified?

The engine runs sweetly when accelerating and i haven't heard any backfire

Set the valve timing using the rule of 9 when we changed the HG. How can i check if the timing it correct?

 

Last edited: Apr 14, 2012

martin1512

Well-Known Member

• Apr 14, 2012

• #4

Do you know what Weber model it is?

 

Jason2

Well-Known Member

• Apr 14, 2012

• #5

Mine used to do this!! I tried absolutely everthing including carb renovation kit, checked for air leaks, electronic ignition, managed to get it 95% OK but it would still want to die every so often at junctions but a blip of the throttle picked revs up.

Good luck !

 

jamesmartin

Well-Known Member

• Apr 14, 2012

• #6

tappets are set using the rule of nine not timing which is best done with strobe ,carb may benefit from a strip and clean and get a haynes manual or similar to help you set carb more than likely blocked idle jet ,low float level etc,idle solenoid etc

 

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Costlyy

New Member

• Apr 14, 2012

• #7

How can i check the carb model? The landy is a standard '87 2.5 petrol AFAIK.

tappets are set using the rule of nine not timing which is best done with strobe ,carb may benefit from a strip and clean and get a haynes manual or similar to help you set carb more than likely blocked idle jet ,low float level etc,idle solenoid etc

Click to expand...

Which Haynes? The only one i can find for the 90 covers the diesel engines.

 

jamesmartin

Well-Known Member

• Apr 14, 2012

• #8

2.5 will be one of these weber 32/34 as here http://www.google.co.uk/url?sa=t&rc...sg=AFQjCNFNewMPEhLCUqFkzWbNKBlnyPayRA&cad=rja

 

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Costlyy

New Member

• Apr 14, 2012

• #9

jamesmartin said:

2.5 will be one of these weber 32/34 as here http://www.google.co.uk/url?sa=t&rc...sg=AFQjCNFNewMPEhLCUqFkzWbNKBlnyPayRA&cad=rja

Click to expand...

Yep, that's the one!

That article says cleaning the jets is easy.. uh.. i'm pretty new to this so could anyone elaborate on that?

and how do you change idle speed?

Thanks

 

jamesmartin

Well-Known Member

• Apr 14, 2012

• #10

see if thers anything on here pictures will be better help http://www.google.co.uk/url?sa=t&rc...sg=AFQjCNFMEFHJh_h77IUt6kNJ_Va5tzSxKw&cad=rja

 

martin1512

Well-Known Member

• Apr 14, 2012

• #11

I always find it much easier to show someone how to do something than to try and explain how.

 

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Costlyy

New Member

• Apr 14, 2012

• #12

Could you try?

Lets start with idle speed adjustment.. which screw + where etc etc

Thanks

 

Jason2

Well-Known Member

• Apr 14, 2012

• #13

If you have not got a clue you are better off getting sombody that has to have a look at it.

Engine timing and carb tuneing is a lot down to "rack of the eye & twist of the gob" You have to listen to the sound of the engine whilst winding the mixture screws out, blip the throttle to see how quick and sharp she picks up etc ... Somthing that you learn to do over the years and not from a book or forum post !

 

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Costlyy

New Member

• Apr 14, 2012

• #14

That sounds reasonable enough. I am pretty far out of my depth.

Thanks for the help folks, it's time for me to call a professional.