SteveHobart 57 Posted September 12, 2020 Hi All. I’m looking for some advice. I have an issue with my 250 Crossflow EFI Engine. She will start up and run (really rich) but then stop. I’m suspecting it’s hydrolocking on fuel (you can look into the cylinder and see a pool of petrol on top of the piston). Is a rebuilt engine, running 10:1 compression, big cam and Megasquirt ecu and bigger injectors (as advised by the Injector Shop) I need someone to help diagnose what could be causing this, I am thinking it could be (solely or a combination of):- Open Circuit on the Injectors- Overly rich fuel map on the Megasquirt- Too big injectors Any advise would be appreciated. And yes, it is an actual deep pool of petrol sitting on top of the cylinder. Sent from my iPhone using Tapatalk Share this post Link to post Share on other sites
Banno 479 Posted September 12, 2020 Pressure regulator diaphragm has split or hole?Sent from my iPhone using Tapatalk 1 bear351c reacted to this Share this post Link to post Share on other sites
SteveHobart 57 Posted September 12, 2020 And where does that live? Sent from my iPhone using Tapatalk Share this post Link to post Share on other sites
Banno 479 Posted September 12, 2020 Firewall end of the fuel rail. Take the vacuum line off and see if it wet with fuel or smells bad of fuel.I had one leak through the vacuum line of the fuel reg once on a xflow.Sent from my iPhone using Tapatalk Share this post Link to post Share on other sites
SteveHobart 57 Posted September 12, 2020 Yup. Smells of fuel badly. Thanks guys!Sent from my iPhone using Tapatalk 1 gerg reacted to this Share this post Link to post Share on other sites