Is this the dreaded 914 vapor lock?, Asking for your ideas and thoughts |
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Is this the dreaded 914 vapor lock?, Asking for your ideas and thoughts |
Artfrombama |
Jul 14 2024, 05:04 PM
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#1
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Member Group: Members Posts: 156 Joined: 21-January 24 From: Alabama Member No.: 27,870 Region Association: South East States |
Drove my 914 to a PCA function yesterday morning, 93f and humid.
After driving on the interstate at 70-75mph for around 45 miles I exited and the motor died. I had enough momentum and coasted into a gas station/convenience store where I topped off the tank and tried to restart the car, no luck. The car would fire, run a few seconds and die then refused to re-start for another 10-15 minutes then the same scenario again. No tools to diagnose or repair. While waiting on AAA for three hours (another story) I would occasionally try to start the car with the same results. Today, car started normally, runs normally. 1974 L-jet, original three bung fuel pump, original location. 500 miles on new tank, sock, filter, ss lines. |
wonkipop |
Jul 14 2024, 08:08 PM
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#2
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Advanced Member Group: Members Posts: 4,611 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille |
another factor in USA cars is the ethanol content in your fuel.
i know from experience here with a mate when he drove his old falcon to bathurst in very hot weather he was forced to fuel with the ethanol fuel that is sold here. it just kept boiling fuel in the fuel lines. we tried everything. wrapping the fuel pump with a damp rag. etc. he never had the problem with regular proper fuel here. it makes the problems with cavitation if they are present a lot more sensitive. but i don't think that is art's problem completely. it really sounds like some kind of vacuum collapse in the fuel feed line. could be triggered by coming off throttle. then getting back on throttle a bit. flow/pressure changes in feed line. snaps or collapses the fuel line shut. carefully look at all the loops in the flexible sections of fuel liine feeding the pump from the tank. EDIT and......if you can eliminate fuel supply as an issue then perhaps its an electrical component. i'd have to think about what that could be. though if its related to heating and then operating once its cooled down you would think it would have come good during that three hours you waited for AAA. |
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