K04 for the '01 A4: Are larger fuel injectors needed?
#1
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I'm confused about this issue. I'm in an '01 DBW that with AWE/GIAC software, has sufferred from power loss and surging/hesitation at WOT above 4000 rpm in 3rd, 4th, and 5th. I have the 5 bar FPR and now have the MTM modified cat, ported exhaust manifold, and 70mm downpipe/exhaust.
In order to get the MTM stage 3 software, I'm told I need to get the larger injectors. I gues my question is this: If I get the larger injectors will I be fine then with my GIAC K04 software?
(Things NOT causeing my problem: hose leak, bad BPV, bad MAF, bad/fouled plugs, or bad 02 sensor.)
In order to get the MTM stage 3 software, I'm told I need to get the larger injectors. I gues my question is this: If I get the larger injectors will I be fine then with my GIAC K04 software?
(Things NOT causeing my problem: hose leak, bad BPV, bad MAF, bad/fouled plugs, or bad 02 sensor.)
#2
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run the large injectors at the pressure they recommend and your fuel map should be ok.
5 bar seems really high - one way to check if the fuel injectors are maxing out is to vag and check the injector cycle, if its 25ms and above, you are running out of fuel.
5 bar seems really high - one way to check if the fuel injectors are maxing out is to vag and check the injector cycle, if its 25ms and above, you are running out of fuel.
#3
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pulse has max reading of 35.6 ms, which is at the point my car went lean. Everything below that was running perfect. The dbw maf also has a max reading of 215 g/s and even the GIAC 2000 J31 chip for the K04 which runs 27+ psi does not fully hit that limit.
Another way TimB can go is to put in a 1:1 adjustable FPR and lower it to about 3.6 bar and run 310cc injectors. This will give the right amount of fuel down low and me a little richer at higher rpms.
Another way TimB can go is to put in a 1:1 adjustable FPR and lower it to about 3.6 bar and run 310cc injectors. This will give the right amount of fuel down low and me a little richer at higher rpms.
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