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Hugh,
I don't have any answers for you except to let you know that you are not alone. My injected 360 has the same challenges. If outside temps are above around 90-95 and I am able to attempt restart within say 10 minutes - it will ususally start. After that, better just sit in the air conditioned FBO. It usually takes 25-30 minutes before the engine will restart.
I have heard and tried a number of ways to restart including no use of electric fuel pump at all - to letting the fuel pump run for up to 2 mins. I have also tried different settings for the throttle and mixture with no (consistent) luck. Time to allow the engine (and fuel system) to cool is the only thing that works for certain.
I think this is an issue for a lot of smaller Lycoming injected engines in many different airplanes.
Thankfully, cooler weather is a few weeks away.
Matt McManus
LNC2 360
Quoting HUGH MATTERN <hkb7ld@embarqmail.com>:
Has any one had problems with vapor lock on fuel injected LNC2 airplanes?
I am not sure vapor lock is the problem but I have had the electric fuel pump cavitate and not develop pressure when trying to start after the engine is hot.
Also how to you start a fuel injected engine with out electric fuel pump pressure?
Thanks
Hugh in Las Vegas the hot country
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