Isn't vaporlock virtually eliminated with fuel injection? I haven't had my plane out in a while, so can't say for sure... `)lrscott said:My guess might be vapor lock. Planes will do this when the engines have been running for awhile and the weather is hot, you shut it down and its nearly impossible to start. You have to give it a ton of gas to get the engine(s) going. My friend's honda also does this... Him and I still don't know why. Your fuel pump might not be supplying enough pressure. Have you measured the pressure yet? You can do so by using a simple tire pressure gauge on the fuel rail.
We had a Cessna 414 at one point that was fuel injected. It was notorious for vapor locking the moment you shut those crappy continental's down. I remember having the in-laws in the back and sat there cranking the engines for 10 min. The look on their face was hysterical. I've had carburated 172s fire right up after you shut them down for a couple of min in mid summer. It just depends on the engine. It seems that the lycomings tend to be a bit more eager to start based on my experiences.Isn't vaporlock virtually eliminated with fuel injection? I haven't had my plane out in a while, so can't say for sure... `)
lrscott said:purplereptile, Could be a number of things. Have you pulled any codes off of it? I might suspect the throttle position sensor, but idk. Mine has done this before with the idle acting strange. It was power related, if i started it on a low battery (REALLY LOW) the idle would act very strange until i restarted it. Did you do anything to the vehicle that might have caused this? I.e. changed the ground and didn't hook it up properly? There really are a ton of things that can cause this.
lrscott said:When does it die exactly? Does it only die at stops or does it do it under load, etc.? You might want to consider getting an OBD scanner of your own. I got one for 12 bucks on ebay. It can read engine codes and live data and has kept me away from the mechanic and saved me tons of money. If you do get the scanner on it again, read what the live data is, specifically from the O2 sensors and MAF sensor.
lrscott said:Another thing that you might try, mainly because its cheap (and I should have recommended it in the first place)... The relay or fuse for the fuel pump, EFI etc. might have a hairline crack in it. The contacts heat up and cause the metal to expand and then cause a break in the connection. You have to let it cool for them to regain contact. This isn't a common problem, but I've seen it happen before.