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new fuel pump but still problems

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kelvinb

20+ Year Contributor
726
3
May 7, 2004
Lincoln, Nebraska
afpr is still on its way, but the 255 is in. mods are listed in profile. this log is telling me:

1st-4th

stock fpr the problem?

timing tps rpm knock injector pulse width

37° 10.2% 3688 0 1.54ms
36° 27.1% 3813 5 4.86ms
29° 55.7% 5094 4 16.64ms
20° 95.3% 5281 4 21.76ms
23° 95.7% 6531 3 18.18ms
19° 95.7% 6281 2 18.43ms
30° 51.8% 5250 0 13.31ms
18° 100.0% 4500 14 25.09ms
13° 100.0% 5156 14 22.53ms
16° 100.0% 5656 13 21.25ms
19° 100.0% 6219 12 18.43ms
17° 98.8% 6656 11 12.80ms
43° 100.0% 4344 1 20.48ms
17° 100.0% 4813 11 23.30ms
15° 100.0% 5156 10 22.53ms
16° 100.0% 5406 10 20.99ms
17° 100.0% 5719 17 20.22ms
17° 100.0% 5906 16 19.71ms
18° 100.0% 6125 15 19.20ms
18° 100.0% 6281 19 18.94ms
17° 10.2% 5719 6 5.12ms
18° 100.0% 4844 10 23.30ms
15° 100.0% 5063 17 22.53ms
14° 100.0% 5125 16 21.76ms
14° 100.0% 5375 20 21.25ms
14° 100.0% 5438 19 20.48ms
14° 100.0% 5656 26 20.74ms
13° 100.0% 5656 25 21.25ms
14° 100.0% 5781 24 19.46ms
14° 100.0% 5844 23 19.20ms
16° 100.0% 5938 22 19.20ms
 
Stock FPR overrun with the the 255 would cause fuel trims to be wacky, but WOT (when alot less fuel is being returned to the tank) should not cause what you see below.

Note that your Injector DC% are way high. Could be you have a huge boost leak and the ECU is dumping in exess fuel (rich knock).

Are you running any type of AFC / EPROM to modify your fuel delivery? What is your base Fuel Pressure set at? By applying (+) pressure to your stock FPR does your fuel pressure rise (can test this out with a small hand pump) :dsm:

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DSM90AWD said:
Stock FPR overrun with the the 255 would cause fuel trims to be wacky, but WOT (when alot less fuel is being returned to the tank) should not cause what you see below.

Note that your Injector DC% are way high. Could be you have a huge boost leak and the ECU is dumping in exess fuel (rich knock).

Are you running any type of AFC / EPROM to modify your fuel delivery? What is your base Fuel Pressure set at? By applying (+) pressure to your stock FPR does your fuel pressure rise (can test this out with a small hand pump) :dsm:

logx.jpg


i know its being overrun because the idle is shit, fuel trims were low -139 mid 100 high 100. its very possible i have a boost leak, but no air compressor is my problem. no eprom or afc installed. thanks for info, i will be checking these things.
 
I sounds like you are probally getting rich knock. get that fpr on there. BTW tomorrow i am getting my windows tinted do u think you could pick me up when i drop off my car. If you do we cal look into the problem and do some more logs with more parameters. Leave me a message on here or scr my phone died and my charger is in bellevue with my computer.
 
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