Volvo 340 Redline 1.7 1989 Highidle missfire & lumpy/sha

[ChesterRedline]

hello i have a volvo 340 redline 1.7 1989 just brought ir and i love it only problemis the car s idleing at 2000 rpm 3000 with choke out the engine is miss firing and when idleing is shaky/lumpy any ideas on how to fix plz i have had a look at the idle screw and looks fine but i dnt no much abwt carbs and wud love to have it running right to come to the ace cafe meet

[mickt]

Hi ChesterRedline

I had same trouble with my car

I think the cause there could be an air leak at joint between base of carburettor and inlet manifold . At this joint there is a (blue?) heat insulating piece . I was lucky enough to get another inlet manifold from a scrap car and get someone to fit it - then the problem was solved.

It is possible to test for leaks at this joint quite easily

Hope this is of help

cheers mickt

[ChesterRedline]

i am sorry but a bit of a novice at cars how wud i test for air leaks the other thing is when i take the air filter off it wont start unless choke is out is this right?

[340ovlov]

hi mate it sounds like its drawing air from a seal on the carb best way to test is to get the car running and whilst its doing that spray some carb cleaner around the outer body of the carb if its starts to run right then u have a air leak u can either rebuild the carb or find a scrapper with one in and try that

[340ovlov]

also have a read of the green books on the site on this link

http://www.volvo300mania.com/forum-uk/v ... topicdays=

[ChesterRedline]

will try and check it today and let u no how i get on