In my case, the vapor lock is occurring in the fuel hose running from the fuel tank to the rear filter. In fighting vapor lock in my 330GT for quite a while, I've come to several conclusions.ġ. Oops, forgot to mention, I run a GTC, but the pump and issues are the same. I have them separately switched for redundancy. The thickness of the phenolic spacer and gaskets are also very critical, too thick and you won't get enough stroke, and too thin may bend the lever arm.75mm makes a difference!Īll that said, I understand your frustrations, I went through all this and I got my pump to work as well as anyone could, but guess what? I still run my electric pump 100% of the time due to starvation in the conditions Dyke mentions, in fact I have two electric pumps in-line, the original click-click-click Fispa and a modern buzzer. I am assuming you addressed the many wear points in the mechanism to remove all the play because the amount of stroke produced by the drive pin is not much, and check that your pin is not overly worn. You mention that you refurbished the mechanical pump, but I thought I would mention that some of the valves supplied with the so-called rebuilt kits are not very good. Must be a fix without using the electric pump. I already talked to Tom about it and he said it is a common problem and is best solved with using the electric pump.Īppreciate advice from you experienced 330GT drivers. Believe the problem area is where the fuel line is crossing over the exhaust pipe, but I could be wrong. I have attached some pictures to illustrate. But these are in good condition and checked. By the rear filter there are some non original short lines and fitting. The long main metal fuel pipe under the car is probably a bit old, but did flush it. The original yellow fuel lines are all fresh Tested with heat shield ( which maybe helped a bit, but didn't solve it) Tried some heat wrap ( which maybe helped a bit, but didn't solve it) Cleaned and refurbished mechanical pump Cleaned and refurbished the fuel bowl / regulator at front I would like to be able to drive it only on the mechanical pump if that is possible. I want to know if anyone has a solution to this problem apart from turning on the electric pump. If I then turn on the electric pump it solves the problem and I can continue driving. The fuel bowl at the front goes empty or runs very low. It typically happens if I get stuck in traffic or have to stop for a bit after a long drive. My car drives fine normally, but I get fuel supply problems once it is hot. Hi everyone, hope you have some good advice regarding Vapor Lock in 330GT.
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