Posted February 18, 201015 yr comment_310004 Car is a 77 280z with fuel injection. I posted earlier on pg 5 now under "Trouble Running". Please see that for back ground, I have since replaced the fuel pressure regulator, cleanned the fuel rail and replaced the fuel filter. The trouble is, there is no fuel coming out of the return line when the car runs. As before, the car only runs for a few minutes, then bogs down like a vacuum leak... Still unable to advance the throttle without the car bogging down. I have also replaced the mass air flow sensor and the air regulator. I replaced the ECU, and checked the ECU plug with a continuity meter, doesnt seem to be an electrical or air problem. Has anybody had a similiar problem? Please help! Thanks...P.S. for some reason, I still love this car! Link to comment https://www.classiczcars.com/forums/topic/34797-fuel/ Share on other sites More sharing options...
February 18, 201015 yr comment_310008 If you say the fuel pressure is good and you replaced your pressure regulator and cleaned the lines, then it has to be insufficient fuel quantity from your fuel pump. Did you do a fuel quantity test? Link to comment https://www.classiczcars.com/forums/topic/34797-fuel/#findComment-310008 Share on other sites More sharing options...
February 18, 201015 yr Author comment_310010 no, I did put a new pump in the car. Link to comment https://www.classiczcars.com/forums/topic/34797-fuel/#findComment-310010 Share on other sites More sharing options...
February 18, 201015 yr comment_310013 Need a little more history. Did the car run okay before this problem developed? Did you purchase the car in this condition? Had it sat, not running, for an extended period? Running a fuel pressure test might have prevented the replacement of those rather expensive (if new) parts. Edited February 18, 201015 yr by sblake01 Link to comment https://www.classiczcars.com/forums/topic/34797-fuel/#findComment-310013 Share on other sites More sharing options...
February 18, 201015 yr Author comment_310015 yes, purchased the car with this problem... The car had sat for a while. I put new fuel in it, and used stabil and injector cleaner. I find the fact that the return line is not flowing very odd... I cleaned the rail and replaced the regulator. The bible refers to 36 PSI, shouldnt I at least be getting some pressure on the return line? Link to comment https://www.classiczcars.com/forums/topic/34797-fuel/#findComment-310015 Share on other sites More sharing options...
February 18, 201015 yr Author comment_310016 sorry, the fuel pressure was fine between the rail and the filter... Nothing on the return Link to comment https://www.classiczcars.com/forums/topic/34797-fuel/#findComment-310016 Share on other sites More sharing options...
February 18, 201015 yr comment_310017 Test the fuel pressure while it's running and watch what happens to it as the car begins to die. I'm thinking that you still have junk in your fuel system from sitting. Edited February 19, 201015 yr by sblake01 Link to comment https://www.classiczcars.com/forums/topic/34797-fuel/#findComment-310017 Share on other sites More sharing options...
February 19, 201015 yr Author comment_310018 thanks, I will do that. Link to comment https://www.classiczcars.com/forums/topic/34797-fuel/#findComment-310018 Share on other sites More sharing options...
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