V8 Weak left bank
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2nd Gear
Joined: Jul 2009
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V8 Weak left bank
I have a 3.9 Range Rover engine fitted with an Edelbrock carburettor. I recently fitted Air Fuel Ratio sensors in the left and Right exhausts in order to set up the carburettor. Unfortunately whatever combination of jets and rods I use the left bank is always much weaker than the right. left bank can be about 16:1 AFR while the Right Bank can be 14.7:1 AFR. I don’t think it is a manifold air leak as the same sort of difference exists at all revs. Any ideas would be very much appreciated.
Allan
Allan
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2nd Gear
Joined: Jul 2009
Posts: 2
Likes: 0
Weak Left Bank
Many thanks Disco Mike. Following your suggestion I disconnected and blanked all the vac pipes, unfortunately with no change, however, it was worth a try. I have also swapped over the AFR sensors and checked the Compression, float level, timing, Hydro Carbons 120, all appears to be OK. I think I will just have to go right back to basics and replace the manifold gasket again just to eliminate air leaks.
I hope you don't think me cheeky but I don't actually have a Land Rover, just a tuned up 1989/91 3.9 Range Rover engine in a Dax Rush kit car, however, you guys would have more of an idea than others regarding this engine.
I will give an update when I have found the problem but may have to wait a while. (You know how it is, grass needs cutting and windows to paint).
Many Thanks
Allan
I hope you don't think me cheeky but I don't actually have a Land Rover, just a tuned up 1989/91 3.9 Range Rover engine in a Dax Rush kit car, however, you guys would have more of an idea than others regarding this engine.
I will give an update when I have found the problem but may have to wait a while. (You know how it is, grass needs cutting and windows to paint).
Many Thanks
Allan
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