wigenOut-S30 Posted September 20, 2010 Share Posted September 20, 2010 Went to the track Saturday night.. it was about 1.5 hours away. On my way home I ran though third gear but noticed it started leaning out. and then all of a sudden while driving my Wideband was leaning out dead lean.. I pulled over.. engine was idling ok.. Fuel pressure looked normal.. I had a friend drive while I cracked open the laptop and had to add tons of fuel so we could get home. Sunday I loaded my original map back in and she is running fine but still kinda lean and I do not want to try to boost it. I have a walbro 255 pump,(about 3 years old) 440CC 7mgte injectors with Mega-squirt and spark. First thing I will be replacing is the fuel filter but it is only about 4 months old. Has anyone had a pump die on them in this way? or could maybe I have some clogged injectors? Quote Link to comment Share on other sites More sharing options...
S130Z Posted September 20, 2010 Share Posted September 20, 2010 My pump died on me like that. Is your pump mounted in the lowest spot in your fuel system? Mine was mounted too high, causeing the fuel to drain out of it. This would cause the pump to prime dry on initial start up, and this lead to the death of my pump. Also, my buddie's pump in his RX7 is going out in the same way you have stated, and his is a Walbro 255. Quote Link to comment Share on other sites More sharing options...
wigenOut-S30 Posted September 20, 2010 Author Share Posted September 20, 2010 My pump died on me like that. Is your pump mounted in the lowest spot in your fuel system? Mine was mounted too high, causeing the fuel to drain out of it. This would cause the pump to prime dry on initial start up, and this lead to the death of my pump. Also, my buddie's pump in his RX7 is going out in the same way you have stated, and his is a Walbro 255. I have it mounted in stock location. I have run it down below E a few times though.. ALso I noted in the last month or 2 when I crank the car.. it sputters and runs like on 5 cly until I give it a blip of the throttle and then it clears up.. It sounds like time for a new pump. Quote Link to comment Share on other sites More sharing options...
wigenOut-S30 Posted September 20, 2010 Author Share Posted September 20, 2010 Swapped out the fuel filter for a Z32 turbo unit.. Looks like it solved the issue.. WOT now is at 10.2-10.5 lol.. Time for some tuning... Quote Link to comment Share on other sites More sharing options...
wigenOut-S30 Posted September 21, 2010 Author Share Posted September 21, 2010 spoke too soon.. now just intermittently running lean.. under really light load.. it leans out... harder accel it rich-ens up but still kind of lean.. Quote Link to comment Share on other sites More sharing options...
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