Matt Petersen Posted November 16, 2017 Share Posted November 16, 2017 Dedicated offroader that I have recently built. When I first got it I had issues after running for a while which I put thought I replaced by switching the dizzy and ignition system out for an HEI and by heat wrapping the fuel lines. Recently did a trip where we had a relaxed drive of about 45-60 mins in on private roads before we got to the stages. After about 45 mins I started to get some mis firing and reluctance to rev out and lack of power. Pulled over and checked everything, had bonnet up for 10 mins. Jumped back in, ran fine for a few minutes then started again. Ended my day and drove out, couldn't rev past about 1700rpm and was down on power. It's obviously heat related but not sure if it's fuel or electrical. I am going to get a fuel pressure gauge to monitor the rail pressure and will find the test data for the MAF and check both of those next time it's playing up. I can't think of any other electrical components involved as I have the HEI now. Thinking of putting a couple of vents in the bonnet to allow excess under bonnet temps to escape. Anyone have any other thoughts? Cheers Matt. Quote Link to comment Share on other sites More sharing options...
110 V8 Posted November 16, 2017 Share Posted November 16, 2017 Fuel tank breather clear and not blocked? Andy Quote Link to comment Share on other sites More sharing options...
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