More on my issue.
02-13-2003, 10:05 AM
#1
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More on my issue.
At lunch I ran out and logged block 33
At idle for Bank 1 and bank 2 -7%. At Part B1 and B2 -25%
BTW- I tried pinching off the line to the charcoal canister and it made no difference.
At idle for Bank 1 and bank 2 -7%. At Part B1 and B2 -25%
BTW- I tried pinching off the line to the charcoal canister and it made no difference.
02-13-2003, 10:26 AM
#5
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can you energize the fuel pump with the injectors out?
i.e. test for leaky injectors?
i think you can do it by pulling the injectors out, but leave the fuel and electrical connectors plugged in..and just turning the key to ON...maybe bentley has a procedure for it.
I suspect this isn't your problem since you have it on both banks, but easy test.
that kit just uses larger injectors, not a rising rate fpr, right?
you'll find it. it will **** you off for a while, but you'll find it.
i think you can do it by pulling the injectors out, but leave the fuel and electrical connectors plugged in..and just turning the key to ON...maybe bentley has a procedure for it.
I suspect this isn't your problem since you have it on both banks, but easy test.
that kit just uses larger injectors, not a rising rate fpr, right?
you'll find it. it will **** you off for a while, but you'll find it.
02-13-2003, 10:31 AM
#6
yeah, you can do the test blocks or something. First one will run fuel pump
but I doubt they are injectors since it seems consistent on all cylinders. Not a bad idea checking though
02-13-2003, 10:44 AM
#7
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It's constant because that is the max it can take out
25% is a lot of fuel. Have you tried resetting the ECU?
If you could log MAF, air temp, RPM, injector pulsewidth, intake vacuum, and barometric pressure, we could try and calculate to see if the MAF readings are out of whack, or injector pulsewidth is wrong (leaking injectors?)
If you could log MAF, air temp, RPM, injector pulsewidth, intake vacuum, and barometric pressure, we could try and calculate to see if the MAF readings are out of whack, or injector pulsewidth is wrong (leaking injectors?)
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02-13-2003, 10:47 AM
#8
Actually, I mean it's constantly happening - at idle and cruise. If it was only one of the tables
it could indicate a sensor utilized in that table sending the wrong information, or the ECU itself.
The WOT table uses very few main sensors, since it relies more on preprogrammed values, so it would behave differently if it's only a sensor
The WOT table uses very few main sensors, since it relies more on preprogrammed values, so it would behave differently if it's only a sensor
02-13-2003, 10:59 AM
#9
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7% at idle is OK, 25% at part throttle is not.
the spec is +/- 10%. I would think if it was a leaky injector, the lower the RPMs, the worse it would be.
WOT does adjust the fuel trim, but it does use it.
You could try resetting the ECU, then quickly doing a WOT run and logging the O2 voltages. Then let the fuel trim adapt to 25%, and do another WOT run, and compare the O2 sensor readings.
If the first run is way rich, then it's affecting both part and full throttle.
If the second run is way lean, then it's affecting just part throttle. (this is my problem)
WOT does adjust the fuel trim, but it does use it.
You could try resetting the ECU, then quickly doing a WOT run and logging the O2 voltages. Then let the fuel trim adapt to 25%, and do another WOT run, and compare the O2 sensor readings.
If the first run is way rich, then it's affecting both part and full throttle.
If the second run is way lean, then it's affecting just part throttle. (this is my problem)
02-13-2003, 11:05 AM
#10
7% is actually high in my book. I like to see idle around zero +/- 2% STFT ...
I just helped a VR6 GTI not too long ago who had LTFT issues. I hooked up the VAG, saw about 8% idle, and when I slowly reved up to about 3000 rpm (no load), went up to around 15-18%. I told him at cruising is when he hits 25% load. I told him to take my VAG tool, find that torx bit, remove the MAF element and soak it in alcohol. Then reset the ECU and try it again. He did it the next day and his car is running good ever since. 7% is high in my book, and will eventually rise up to 25% at close loop.