wain 879 Posted April 19, 2018 Report Share Posted April 19, 2018 been flying the JF Warrior a bit now in XP11, I get spark plug foul warning from time to time and there's a procedure to get rid, however occassionally I get a thing come up on screen warning of vapor lock? am I supposed to do something then ? I have looked around for an answer but all I seem to find is what it is, not sure if it means something has to be done.... Any help appreciated.... Link to post Share on other sites
Quickmarch 488 Posted April 19, 2018 Report Share Posted April 19, 2018 Vapour lock is a heat induced issue with the fuel delivery system. Used to cause problems in our cars during the carburetor-era. The easy solution was to let the engine cool off. I flew a great many variants of the Piper PA-28 series a long time ago in a galaxy far, far away and I do not recall vapour lock ever being mentioned as something to look out for. Warriors used Lycoming carburetted engines (by recollection) running 100LL. Now, in all fairness, my experience with these aircraft was confined mostly to Ontario and Quebec with some forays into upstate New York. Ground temps could get well up into the 90's (real temperature measurement system). There were rumours of Lycoming and Piper trying to certify these engines on automotive fuel. If that ever happened, it was after my time with them. I suppose that ground handling on automotive gas at hot airports might cause vapour lock. 1 Link to post Share on other sites
brett 2,283 Posted April 19, 2018 Report Share Posted April 19, 2018 Don't you get a popup with suggested corrective actions, I thought I read something along those lines. 1 Link to post Share on other sites
brett 2,283 Posted April 19, 2018 Report Share Posted April 19, 2018 (edited) Like March said vapor lock is caused by excessive heat near the fuel lines that turn the fuel to a gas and block the lines to the carburetor and it can even happen in fuel injected systems. There's lots of conversation about different fuels that might cause it more than others in certain engines but as to what to do when it happens most say to turn on the fuel boost pump to force the blockage out and do what you can to cool the engine. Real world maintenance procedures would be to check manufactures fuel and additive requirements and to reroute fuel lines or shield them from the hotter areas around the engine. Edited April 20, 2018 by brett Link to post Share on other sites
wain 879 Posted April 20, 2018 Author Report Share Posted April 20, 2018 cheers for the explaination guys...... I must have missed the corrective action popup I will do some more checking...... Link to post Share on other sites
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