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Author: Subject: Guess my problem-fuelling issue
davidimurray
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Posts 813
Registered 25/1/10
Location South Wales
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Building: Haynes Roadster
posted on 18/4/15 at 06:22 PM Reply With Quote
Guess my problem-fuelling issue

Been out for the first test drive with the Duratec fitted today

But then I've run into a problem. Car is fine at idle (AFR about 13.4), fine when I give it some welly (AFR in the 11-13 range so abit rich if anything), but when cruising at steady RPM/load the AFR goes off the scale lean and the car looses power. Also when coming off a full throttle run, the AFR goes lean on the way down.

I've had the fuel pipe off at the carbs and the flowrate is good and also the carb pre-filter has been checked and was spotless. This ties in with there being plenty of fuel and a good AFR when at full throttle. While messing around today I also raised the needles one groove to richen things up and there has been no difference.

To me this is all pointing towards blocked pilot jets in the carbs (ZX6Rs) - hopefully going to pull them apart tomorrow but just wondered if anyone had any smart ideas of things to check/look for.

Below are a couple of megajolt logs that show the AFR going lean.

Cheers

Dave

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Gallery 1 http://www.facebook.com/media/set/?set=a.116893465324.130778.601005324
Gallery 2 http://www.facebook.com/media/set/?set=a.245243755324.181913.601005324&l=a9831a9319
Gallery 3 http://www.facebook.com/media/set/?set=a.440671625324.232627.601005324&l=3f0d42c523
Gallery 4 http://www.facebook.com/media/set/?set=a.490098255324.297598.601005324&l=efb083b7df
Gallery 5 http://www.facebook.com/media/set/?set=a.10150244028550325.366987.601005324&l=583fd5cd3a
Gallery 6 http://www.facebook.com/media/set/?set=a.10150550640070325.430417.601005324&type=3&l=fe779b358c
Duratec Engine Swap https://www.facebook.com/media/set/?set=a.10152527759580325.1073741828.601005324&type=1&l=40aae5e72f " target="_blank"> https://www.facebook.com/media/set/?set=a.10152527759580325.1073741828.601005324&type=1&l=40aae5e72f
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mark chandler
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Registered 3/7/05
Location Whitland
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Building: Sold turboblade, back to tin tops
posted on 19/4/15 at 06:39 AM Reply With Quote
Pin hole in one of the diaphragms or not seated correctly?
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