Engine misfiring - cant find cause
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Engine misfiring - cant find cause
I fitted a 4.6 into my p6 recently running with edelbrock 500. It ran rough and seemed to misfire on 4 cylinders (5,6,7+ . Using a p6 timing cover and distributor (electronic). Believing it could be due to warped heads I removed the engine and fitted another. Replacing the cam with a new 4.2 item and steel timing gears and duplex chain etc. Strangely this engine suffers with the same rough running and misfire on cylinders 5,6,7 +8. This surely is no coincidence. I,ve swapped leads etc to eliminate failing leads. Any suggestions? thanks
It is a 4 barrel, was on a dual plane but I've now changed manifold to an old unit I had. Not too sure what it is but has intake holes for nos and is dated 1987 underneath. Looks like left side of carb feeds left bank and right feeds right bank. Hope that makes sense. Think it could be carb related? The fumes are terrible
That is a big hole at the back of the carb! Anyway its good that you'e sorted it out!Andrewrv8 wrote:Problem solved!! I feel rather silly but I had not noticed a vacuum port on the rear of the carb (presumably for brake servo?) which was wide open
Runs like a watch. Will upload on youtube over the weekend
- SimpleSimon
- Knows His Stuff
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- Joined: Mon Apr 25, 2011 10:36 pm
- Location: East Sussex
It takes a man to admit he cocked up she spins up nicely in that vidAndrewrv8 wrote:Problem solved!! I feel rather silly but I had not noticed a vacuum port on the rear of the carb (presumably for brake servo?) which was wide open
Runs like a watch. Will upload on youtube over the weekend
TVR Chimaera RV8 Mods & Megasquirt
SimpleSimon wrote:It takes a man to admit he cocked up she spins up nicely in that vidAndrewrv8 wrote:Problem solved!! I feel rather silly but I had not noticed a vacuum port on the rear of the carb (presumably for brake servo?) which was wide open
Runs like a watch. Will upload on youtube over the weekend
Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine