Matt
CBT Hero
Posts: 32
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Post by Matt on Apr 18, 2009 21:04:46 GMT
I have a problem with my 92 Diversion 600, the engine runs quite well above 2500 rpm but very lumpy at tick over.
I have tried to balance the carbs, 1 and 2 are not far out, the same with 3 and 4. However, I can't balance 1 and 2 against 3 and 4 or get close!
Any ideas???
Thanks in advance,
Matt.
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Post by Padster on Apr 19, 2009 8:12:06 GMT
You have done it correctly by balancing 1 & 2 together then 3 & 4. There is a screw in the middle to allow you to balance both pairs after doing the pairs seperately.
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Matt
CBT Hero
Posts: 32
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Post by Matt on Apr 19, 2009 15:50:48 GMT
You have done it correctly by balancing 1 & 2 together then 3 & 4. There is a screw in the middle to allow you to balance both pairs after doing the pairs seperately. Not getting any adjustment, or very little with the middle screw |
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Post by darren on Apr 20, 2009 18:19:07 GMT
if its running lumpy on tickover, are you sure its not blogged idle jets, or are you still running hot on all four cylinders
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Matt
CBT Hero
Posts: 32
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Post by Matt on Apr 20, 2009 21:31:47 GMT
Striped & cleaned carbs, Set up balance by sight!! Refitted, now running smooth above 1500rpm
Will re-balance with carbtune when I get time.
Thanks 4 your help,
Matt.
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Post by CD on Apr 21, 2009 14:55:17 GMT
I use the 3ft petrol hose system. Hold the hose end just down a carb bellmouth and listen for the click click as the cylinder sucks - its quite loud. Move the hose to the adjacent carb and listen. Adjust until both clicks are equally loud.
I did my 900 like that. Reaper checked it with his professional quality gauges and all four carbs were spot on.
Result :-)
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Matt
CBT Hero
Posts: 32
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Post by Matt on Apr 22, 2009 12:50:29 GMT
I use the 3ft petrol hose system. Hold the hose end just down a carb bellmouth and listen for the click click as the cylinder sucks - its quite loud. Move the hose to the adjacent carb and listen. Adjust until both clicks are equally loud. I did my 900 like that. Reaper checked it with his professional quality gauges and all four carbs were spot on. Result :-) Never tried that before! will give it a go. |
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Post by CD on Apr 22, 2009 15:48:00 GMT
It was described in the Haynes manual for my first car - 1275 MG Midget. I also learned to weld thin metal on that car - what a rot box.
Ever since I have always done carbs that way. For the unpractised, it can take a while, so worth mounting the fuel tank on the seat area and connect it up. I used rubber anti slip mat to protect the paint.
Next time you take the air box off have a listen with some suitable hose.
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Matt
CBT Hero
Posts: 32
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Post by Matt on Apr 23, 2009 20:15:33 GMT
It was described in the Haynes manual for my first car - 1275 MG Midget. I also learned to weld thin metal on that car - what a rot box. I had the Spitfire, also a rot box! |
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Post by CD on Apr 24, 2009 7:30:36 GMT
I was totally ripped off buying that thing but it was nice when it worked. Engine was effed I think they put in stop smoke to sell it, seat belt mounts fell off, sills and footwells gone, rear suspension mounts, wiring went up in smoke . Front susp bushed gone etc etc. I learned a lot though.
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