altezzaclub Posted February 24, 2016 Report Share Posted February 24, 2016 Is the tank up in the boot above the pump?? Both wagons Steve has owned surged badly and violently going up a hill with less than half a tank of fuel. Neither had lift pumps or surge tanks. Then again, both started fine on level ground, so unless your pump is pretty bad you should be able to start it. Pulling an injector out and watching the fuel spray will tell you. Another possible source might be the fuel pressure valve on the return end of the rail. The latest wagon had the stock one replaced with an aftermarket adjustable, and that being set too low was the cause of its abysmal running. If yours is not right inside it might be dropping the fuel line pressure by returning too much fuel... and the option is that the pump specs are not the same as the stock one and is pumping too much (or not enough) fuel. Quote Link to comment Share on other sites More sharing options...
harryrolla Posted February 25, 2016 Author Report Share Posted February 25, 2016 Yes fuel pump is located above tank in the boot. I just put in a bigger then stock fuel line and it seems to have helped. But the car is revving up nicely then stalling. Quote Link to comment Share on other sites More sharing options...
harryrolla Posted February 25, 2016 Author Report Share Posted February 25, 2016 No I take that back not really any difference in running Quote Link to comment Share on other sites More sharing options...
harryrolla Posted February 25, 2016 Author Report Share Posted February 25, 2016 Fuel pump is wired into on at the key. Looking into wiring it in to the ecu but it should run without it wired up to ecu ? Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted February 25, 2016 Report Share Posted February 25, 2016 it should run without it wired up to ecu ? Sure, the thing that gets people excited is haivng it wired such that it stops when the motor stops, even with the ignition on. The cops don't like the pump working after some accident that has split a fuel line and stalled the motor. Yes fuel pump is located above tank in the boot. Put it below and see if it helps. Usual theory is that the pumps have plenty of push but no suction, so the early days of injection had in-tank 'lift' pumps pushing fuel out to the main pump, then they just started making the in-tank main pumps that everyone has these days. Quote Link to comment Share on other sites More sharing options...
harryrolla Posted February 25, 2016 Author Report Share Posted February 25, 2016 Put it bellow and no difference but sounds like it's pumping better down there so will probably keep it down there. I replaced my injectors 4age bigport with cleaned and flow tested one with all new rubber dark red ones. Is it possible it's a wiring issue ? Quote Link to comment Share on other sites More sharing options...
rebuilder86 Posted February 25, 2016 Report Share Posted February 25, 2016 hmm, I'm not sure what you mean by fuel surging. The fact that the pump is new, is enough to tell me to stop worrying about the pump. If it runs now, and its new, its ok. Perhaps perform a fuel rail pressure test just to be sure. What sort of fuel pressure regulator does this engine use?? Harry can you tell me if the fuel pressure regulator has a vacuum hose coming off it, or just 2 fuel hoses? nonetheless, further with relation to the fuel pressure regulator, you may have the hoses backwards and might be trying to pump fuel into the backside of the regulator, which will successfully fill the pressure side of it and as son as your run the engine that pressure will be let go and it will die. Could be the problem. Quote Link to comment Share on other sites More sharing options...
rebuilder86 Posted February 25, 2016 Report Share Posted February 25, 2016 sorry i never saw page 2 of this, altezza is already onto it! Quote Link to comment Share on other sites More sharing options...
harryrolla Posted February 25, 2016 Author Report Share Posted February 25, 2016 Hey I have brought a surge tank and a genuine Bosch 044 overkill yes but it has minimal use and was a good price :) I'm going to get a vl lifter pump in the tank and wire the pumps up to the ecu I'll let you know how I go :) Yeah vacuum line is on the return fuel pressure regulator. Defently the right way around Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted February 25, 2016 Report Share Posted February 25, 2016 I'm not sure what you mean by fuel surging. Well, I thought of a gentle increase in speed as you accelerate, then it dies momentarily, then picks up, then dies again.. Dad's HQ with the small V8 used to do it, and Holden just said "they all do.." When I drove the 4AGE wagon uphill and it surged, it was violent and savage! Something would have broken in the drivline if you didn't lift off back to where it didn't surge and jerk, and just crawled up the hill. You couldn't accelerate if you wanted to. Try the lift pump on your current main pump first, that will tell you if suction is the problem. Quote Link to comment Share on other sites More sharing options...
rebuilder86 Posted February 26, 2016 Report Share Posted February 26, 2016 Hang on i got the impression this car just being started and trying to get the engine running propperly, not out on the road, acceleration and deceleration hasnt even been achieved yet right??? I think surging he is talking about is something else. Quote Link to comment Share on other sites More sharing options...
kickn5k Posted February 26, 2016 Report Share Posted February 26, 2016 Oh and the fuel was closed air tight in the fuel tank for about 2 years I added 15 liters of 98 to it 2 days ago Can't understand why this hasn't been picked up yet. Sealed or not fuel won't last that long, it still may not be the cause but I'd be completely draining the tank just to rule it out. Quote Link to comment Share on other sites More sharing options...
kickn5k Posted February 26, 2016 Report Share Posted February 26, 2016 is it possible that i might be in diagnostic mode ? how do i stop this happening ? Could only be in diagnostic mode with the two terminals bridged. That's how you check timing while it's running. Quote Link to comment Share on other sites More sharing options...
rebuilder86 Posted February 26, 2016 Report Share Posted February 26, 2016 i had a wrecked mazda 3 sit in my garage for 8 years. After 6 years of not running I started it on the fuel that it had before the crash and it purred fine for an hour. Fuel takes a long time to go off. Quote Link to comment Share on other sites More sharing options...
harryrolla Posted February 29, 2016 Author Report Share Posted February 29, 2016 Fuel system is done vl lift pump to surge tank to Bosch 044 to dual fuel filters there is fuel pressure at the fuel rail. Still not wanting to start. I'll check the injector pulse again tonight. Quote Link to comment Share on other sites More sharing options...
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