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No idle and poor below 4k
Posted: Wed Jul 18, 2012 10:49 pm
by marti
Hi, cured fuel leak, but
I need full choke to start hot or cold.
If i turn the tickover to 3k it "ticksover"
Tried mixture screws everywhere between 2 and 5 turns out, no change
fine above 4k, but will cut out when coming down from hi revs.
Im running 32mm cvs bellmouths dynapro airbox 103 mains blocked off air correctors, full micron.
Fuel pump works ok.
Any ideas?
Re: No idle and poor below 4k
Posted: Wed Jul 18, 2012 10:59 pm
by R P Corse
I had a similar problem, only I had crap in my tank - water and rust! I also had a blocked fuel filter
Re: No idle and poor below 4k
Posted: Thu Jul 19, 2012 1:40 pm
by RedexRobB
Are the plugs ok?
Re: No idle and poor below 4k
Posted: Thu Jul 19, 2012 7:44 pm
by marti
Plugs new, diaphragms ok, the needles look like dynojet with clip on 3rd from top.
I blocked off the air corrector at dyno request a while ago.
Im sure the problem is in the idle circuit, she starts instantly on choke but wont otherwise.
When the choke is off she stumbles up to 4k then flies and runs ok as long as revs dont drop below 4k
Re: No idle and poor below 4k
Posted: Fri Jul 20, 2012 10:14 am
by R P Corse
checked your air mixture screws?
Re: No idle and poor below 4k
Posted: Fri Jul 20, 2012 9:52 pm
by marti
Yes and replaced mixture screw o rings cleaned pilot jets and passageways
Re: No idle and poor below 4k
Posted: Wed Jul 25, 2012 10:03 pm
by marti
I set the tickover to 3k, starts without choke and runs fine everytime!
Re: No idle and poor below 4k
Posted: Wed Jul 25, 2012 10:44 pm
by R P Corse
Bit high...see if you can set it a bit lower!
Re: No idle and poor below 4k
Posted: Thu Jul 26, 2012 11:00 pm
by Tirpitz
marti wrote:I set the tickover to 3k, starts without choke and runs fine everytime!
Jeez, I'd like to see you filter in traffic with a tickover like that
And changing gear isn't going to be exactly smooth. You can't bodge it with a tickover that high, you need to sort the underlying problem.