thegreatestben Posted September 18, 2007 Share Posted September 18, 2007 My chaser has decided it doesn't like boost for some odd reason, I got the feeling the fuel wasn't being delivered correctly as it goes fine until the turbos start doing there thing. I bought a AFR gauge kit from jaycar, which I'm not sure if its telling me the right thing or not, but its rich at idle, and then all g reving with light accelerator, but when I foot flat or touch boost, it jumps to mega lean. Does this sound like injectors not behaving. Also I took them out and tested flow of petrol up to the rail and yep, getting plenty. Noticed there was some wierd sticky clear build up on the ends of one or two injectors. I've never had any experiences with this sort of crap so advice me. Quote Link to comment Share on other sites More sharing options...
nismo.capri Posted September 20, 2007 Share Posted September 20, 2007 Do you have another Fuel Pressure regulator, swap it in if you do. Are you running a surge tank? If not fill the tank to at least 3/4. Quote Link to comment Share on other sites More sharing options...
thegreatestben Posted September 20, 2007 Author Share Posted September 20, 2007 Got a trademe regulator on the way to try. Will put more gas in the tank too. Quote Link to comment Share on other sites More sharing options...
mikuni Posted September 20, 2007 Share Posted September 20, 2007 Woulcn't possibly be something to do with a faulty afm? Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted September 20, 2007 Share Posted September 20, 2007 yuh my thoguhts = that too. esp if you're running increased boost. off topic: do efi injectors get harmed in any way by running a premix 2 stroke stz like alot of rotor boys do? like, will they start to dribble with a 50:1 or thereabouts, mixture? Quote Link to comment Share on other sites More sharing options...
nismo.capri Posted September 20, 2007 Share Posted September 20, 2007 yuh my thoguhts = that too. esp if you're running increased boost.off topic: do efi injectors get harmed in any way by running a premix 2 stroke stz like alot of rotor boys do? like, will they start to dribble with a 50:1 or thereabouts, mixture? Should keep them nice and lubed, it would pay to run injector cleaner every now and again. Quote Link to comment Share on other sites More sharing options...
nismo.capri Posted September 20, 2007 Share Posted September 20, 2007 Woulcn't possibly be something to do with a faulty afm? Could well be. Anything that is fuel flow related is a possiblity. Id expect a faulty AFM to give issues over the whole range tho not just at boost. I'm thinking if the FPR wasn't seeing the manifold pressure there'd be to much fuel at idle and not enough at boost so it was my first guess Quote Link to comment Share on other sites More sharing options...
thegreatestben Posted September 20, 2007 Author Share Posted September 20, 2007 Yeh I'm hoping its not AFM cos I sold my spare with the other engine. I'm running standard boost at the moment. Hoping its the FPR or something... Quote Link to comment Share on other sites More sharing options...
mikuni Posted September 20, 2007 Share Posted September 20, 2007 Is the afm in those a flap one or filament? If its flap you could try opening it by hand under various engine speeds to see if it affects anything. Faulty fpr would probably be the other cause. I can't imagine that the injectors are failing that badly under load but its probably happend before. Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted September 20, 2007 Share Posted September 20, 2007 if it's moving vane also you might wanna crack the cover off if possible and give 'er a clean up in there. did that with the pooj and it made it run alot better. they can suffer from worn copper pickup opints, or carbon tracking from the arm itself. both should be manipulatable. can find an article on it including pics if you wanna dlve that far into it. Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted September 20, 2007 Share Posted September 20, 2007 Should keep them nice and lubed, it would pay to run injector cleaner every now and again. choice. chur boe Quote Link to comment Share on other sites More sharing options...
thegreatestben Posted September 20, 2007 Author Share Posted September 20, 2007 just scared myself. intercooler pipe popped off. was expecting worst. Its a flap type afm. fuck I think the answer is a single turbo eh boys. Quote Link to comment Share on other sites More sharing options...
mikuni Posted September 20, 2007 Share Posted September 20, 2007 yeah, big single is the answer for all problems. may not solve fueling issue though Quote Link to comment Share on other sites More sharing options...
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