DEATH_INC wrote:Paulballz wrote:I have no idea why you can get it to run without the pump and with no fuel pressure. Something is very wrong. You need to go over the fuel system again. You fitted the skyline pump into the tank? I'd rewire it like megasquirt recommends too. If it ran in another vehicle it can't be much, you just need to figure out what you've done that's different to the skyline setup...
I'll admit it..I'm a bit stumped by it for now...
When the guys convert the rd28 laurel to rb20s they just fit either in tank or inline fuel pump and thats that... dont know what is different will try investigate. Still the fact remains though that some how the engine is running with no pump or pressure...is it possible that since the injectors are spraying at full throttle when pump is on it is leaving enough fuel that once pump turns off it carrys on running... Note this: to start the engine i turn fuel on and crank until it trys to fire sometimes it does fire but very cough cough, once fired then i switch pump off and it revs straight up to normal and idles. But it will not fire if i do not prime fuel pump before hand.
Another note that may be completey inrelavent. When i turn the engine off (not let it die) and turn the key back on i get combustion in the cylinder (when megasquirt turns on it sparks all plugs once, then carrys on once cas turns) so this must mean that there is excess fuel still in cylinder?? the compustion usually blows out the intake a puff of smoke or back fires out exhaust even though engine is not turning over