Matt1969 Posted June 30, 2020 Report Share Posted June 30, 2020 It's me again! Just trying to work through all my problems. I have an occasional racing engine. The throttle cable and the rail on the engine look OK. Its a fuel injecting model. Any ideas? Matt from Eyam Quote Link to post Share on other sites
JochemsTR Posted July 1, 2020 Report Share Posted July 1, 2020 18 hours ago, Matt1969 said: It's me again! Just trying to work through all my problems. I have an occasional racing engine. The throttle cable and the rail on the engine look OK. Its a fuel injecting model. Any ideas? Matt from Eyam Hello Matt from Eyam, not sure what ideas you are looking for? Ideas on what to do with the engine?? Jochem Quote Link to post Share on other sites
jerrytr5 Posted July 1, 2020 Report Share Posted July 1, 2020 I think your thread title is confusing people. I am assuming that you mean you have an erratic idle, so probably an air leak or throttle butterfly issue - try a search on here and you should find plenty of info. Jerry Quote Link to post Share on other sites
DRD Posted July 1, 2020 Report Share Posted July 1, 2020 I thought the thread was about a 'Race' engine. Quote Link to post Share on other sites
barkerwilliams Posted July 1, 2020 Report Share Posted July 1, 2020 The revs on the engine is controlled by the six butterflies on the throttle bodies. If air gets into the engine the injection will automatically inject more fuel and the engine will rev. The problem, if not a sticking throttle is usually air leak, often on the inlet manifold - start by checking manifold bolts are secure. Could be leaking vacuum hoses to servo, or the seals around the injectors; it is just a case of working your way through the components.. You commented on the occasional nature of the problem, air leaks would typically be a constant problem therefore I would also revisit the possibility of a sticking throttle mechanism on the throttle bodies. Alan Quote Link to post Share on other sites
Robert Price Posted July 2, 2020 Report Share Posted July 2, 2020 Does the cam for the fast idle always return fully when the choke is pushed in, these can stick on the head of the adjuster bolt. When the idle is higher push down one at a time on each butterfly spindle stop, only a slight movement can make a rev difference. Rob Quote Link to post Share on other sites
Richard Green 54 Posted July 2, 2020 Report Share Posted July 2, 2020 3 minutes ago, Robert Price said: Does the cam for the fast idle always return fully when the choke is pushed in, these can stick on the head of the adjuster bolt. When the idle is higher push down one at a time on each butterfly spindle stop, only a slight movement can make a rev difference. Rob +1 for the fast idle cam suggestion. Had this problem a few weeks ago. Quote Link to post Share on other sites
Andy Moltu Posted July 2, 2020 Report Share Posted July 2, 2020 I had an engine that raced occasionally - when the throttle pedal caught on the carpet. Made an almighty din starting up outside the World Peace Cafe in N Yorkshire. 6300rpm on the rev limiter witht he throttles wide open was far from peaceful. Quote Link to post Share on other sites
JohnC Posted July 21, 2020 Report Share Posted July 21, 2020 On 7/3/2020 at 3:26 AM, Andy Moltu said: 6300rpm on the rev limiter witht he throttles wide open was far from peaceful. Quote Link to post Share on other sites
Paul Hill Posted July 21, 2020 Report Share Posted July 21, 2020 On 7/2/2020 at 4:10 PM, Richard Green 54 said: +1 for the fast idle cam suggestion. Had this problem a few weeks ago. If I pull the choke to the limit it will get stuck = racing engine Quote Link to post Share on other sites
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