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XKE Weber trouble

wangdango

Jedi Hopeful
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Having a miss at 2500 rpm, cleans itself out above that. Anyone have any ideas on how to get rid of the miss? Have no experience w/Webers just SU's. Car is a race prepared XKE by Donovan Jaguar.
 
You sure it's a carbretion problem? What's your ignition setup? I've heard of crosstalk problems on plug wires - are you running wire separators? What webers you running? DCOE?

I had my E at Donovan's years ago, and Brian is an excellent guy. Any reason you're asking here, and not asking Donovan?

Good luck
Pete
70 FHC.
 
Pete,
Brian is pretty busy now with the Select Edition team, so I thought I would start here. Have a Mallory dual pt dist, and have just changed the points and condenser. And yes, have wire separators. If I remember correctly, think they are 45's, but have to go and review my old bills. Car was set up as a "sister car" to Brians blue car (now not blue), but my car is red. Do alot of vintage racing w/my 100M and know a carb problem when it shows up. Just do not know where to start???
 
Wango

You seem pretty knowledgable. There's just a lot of questions to help this type of problem in text. Does she miss at 2500 under heavy throttle as well as light throttle?

While I can't say I'm a weber expert by any means, I had a 45 DCOE on my old MGBGT, a downdraft on my other B, and have a progressive on my jeep.

Does the car run great below 2500 also? Comes off idle ok?

Carbs rebuilt recently? Have you done a throttle shaft seal test to detect leaky seals? And if she misses at 2500 regardless of throttle position, personally I'd have a hard time blaming the carburetion.

Just my $0.02
Pete
 
OK,
after careful examination, seems the foam aircleaner has started to come apart, and looks as though the front carbs have ate some of the foam material. So, where or what should I take apart to clean the material out of the interior of the carbs. I am sure this is the problem as the car ran fine before this occured.............???
 
Well seems to be fixed, took the top off the front Weber and removed all the jets one by one and blew them out w/air. Guess some small bits of the old aircleaner clogged up the holes. FYI foam aircleaners last at a max of 2 yrs then start to break down.
 
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