Max'd out airflow? Turbo turned into a n/a...

Jhoe · Jul 30, 2003

Ok this log was on the highway, third gear, ~10lbs.
7cm housing on 14b, 2g mas vented to atmos., 2g throttle body elbow rigged.
What caused my airflow to peak at 1607? And airvolume Im still reading about. I know I'm running lean, o2 needs to get replaced. Does this look like a intercooler pipe leak or what? The boost drops to 0 when this happens usually. Timing gets knocked back like a n/a car. Confused help?
Thanks

Time RPM Knock Timing O2 Airflow Inj P/W Air Volume Air Temp TPS O2 Trim
00:01.2 3656 0 20 0.65 958 14.103 4 85 36 100
00:01.4 3656 0 19 0.65 977 14.615 4 85 40 100
00:01.7 3688 0 18 0.65 1033 15.128 5 85 40 100
00:01.9 3781 0 18 0.63 1052 15.128 4 85 40 100
00:02.1 3750 0 19 0.65 1052 15.128 4 85 40 100
00:02.4 3906 1 18 0.65 1077 14.872 4 85 40 100
00:02.6 3938 1 20 0.65 1065 14.872 4 85 40 100
00:02.9 3938 0 20 0.65 1096 14.872 4 85 40 100
00:03.1 4062 0 20 0.65 1077 14.872 4 85 40 100
00:03.3 4031 0 20 0.65 1147 15.128 4 85 49 100
00:03.5 4125 0 20 0.63 1134 15.128 4 85 50 100
00:03.7 4250 0 20 0.63 1159 15.128 4 85 50 100
00:03.9 4312 0 20 0.63 1197 15.128 4 85 50 100
00:04.2 4406 0 20 0.63 1285 16.667 5 85 75 100
00:04.3 4500 0 18 0.59 1373 17.436 5 85 73 100
00:04.5 4500 0 18 0.61 1405 17.692 5 85 69 100
00:04.7 4688 0 18 0.61 1411 17.436 5 85 69 100
00:04.9 4688 0 18 0.61 1443 17.436 5 85 69 100
00:05.1 4781 0 19 0.61 1468 17.436 5 85 68 100
00:05.2 4875 0 19 0.61 1481 17.436 5 85 80 100
00:05.3 4906 0 19 0.59 1481 17.692 5 84 80 100
00:05.5 4875 0 19 0.59 1537 17.949 5 84 84 100
00:05.7 5094 0 19 0.59 1562 18.205 5 84 87 100
00:05.9 5094 0 20 0.59 1594 18.462 5 84 85 100
00:06.0 5156 0 20 0.59 1607 18.462 5 84 83 100
00:06.2 5219 0 21 0.59 1607 18.462 5 84 82 100
00:06.3 5219 0 21 0.59 1607 18.718 5 83 81 100
00:06.5 5312 0 21 0.53 1607 18.974 5 83 80 100
00:06.7 5344 0 21 0.53 1607 18.974 5 83 79 100
00:06.8 5469 0 22 0.57 1607 18.974 5 83 79 100
00:07.0 5562 0 22 0.57 1607 18.974 5 83 79 100
00:07.1 5562 0 22 0.57 1607 19.231 5 83 79 100
00:07.3 5656 0 22 0.53 1607 19.231 5 83 78 100
00:07.4 5688 0 23 0.53 1607 19.231 5 83 78 100
00:07.6 5781 2 22 0.57 1607 18.974 5 83 78 100
00:07.7 5688 2 22 0.57 1607 18.974 5 82 77 100
00:07.9 5812 2 22 0.51 1607 18.974 5 82 77 100
00:08.1 5781 1 22 0.51 1607 19.231 5 82 76 100
00:08.2 5938 1 23 0.57 1607 18.974 5 82 75 100
00:08.4 5875 1 23 0.57 1607 18.974 5 82 74 100
00:08.5 5969 1 24 0.55 1607 18.718 5 82 74 100
00:08.7 6031 1 22 0.57 1607 18.462 5 82 74 100
00:08.8 6062 1 22 0.57 1607 18.462 5 82 73 100
00:09.0 6094 1 22 0.57 1607 11.795 4 82 73 100
00:09.2 6156 0 32 0.61 989 8.462 2 82 73 100
00:09.3 6250 0 33 0.63 869 7.692 2 82 73 100
00:09.5 6219 0 33 0.65 832 7.436 2 83 61 100
00:09.6 6188 0 34 0.65 838 7.692 2 83 11 100
00:09.8 5875 0 32 0.02 888 8.462 2 83 11 100
00:10.0 5469 0 29 0 851 8.205 2 83 11 100
00:10.3 4938 0 31 0 611 5.897 2 83 11 100
00:10.5 4500 1 33 0 473 4.872 1 84 11 100
00:10.8 4375 1 34 0 410 0 1 84 11 100
00:11.0 4500 0 26 0 353 0 1 84 11 100
00:11.2 4281 0 26 0.57 328 0 1 85 11 100
00:11.4 3875 0 27 0 296 0 1 85 11 100
00:11.6 3594 0 27 0 265 0 1 85 11 100
00:11.8 3250 0 25 0 246 0 1 85 11 100

Jhoe · Jul 30, 2003

Well I found out that the mas can only be read on a datalogger up to ~1606. Still havent fixed my problem yet any suggestions?

James92TSi · Jul 30, 2003

20 deg timing at WOT is normal, actually.

Are you reading 0 psi on an actual boost gauge, or the stock one?

shabby · Jul 31, 2003

2g mas and no afc?

Jhoe · Jul 31, 2003

I'm running an S-AFC. And I'm reading 0 on my autometer gauge, never had a problem with the gauge before, and you can feel when the boost drops.

James92TSi · Jul 31, 2003

Well then, I'd go ahead and pressure test it, though doesn't really sound like the typical boost leak. Maybe you'll find something out by pressurizing it though.

Jhoe · Jul 31, 2003

Pressure test as in compression test or what kind of test is that? To check for major boost leaks?

noreaga0221 · Jul 31, 2003

Jhoe said:
To check for major boost leaks?

to check for any boost leaks. www.vfaq.com and this website has plenty of exampes for you to follow.

Jhoe · Jul 31, 2003

Before I do this test, I am venting to the atmos, I'll connect that back up but might that be causing the problem?

James92TSi · Jul 31, 2003

It woudln't really fix it.. you'd still be losing boost out of the IC pipes, it'd just go back into the MAS pipe instead of going off to never-neverland.

But venting to atmosphere = :crackit: anyway!!

ATF 2GTalon · Jul 31, 2003

With a boost leak, you should be running rich. But since you're O2 sensor is fubar, its really hard to tell if you have a leak or not. When the boost goes to zero, does it feel like the spark or fuel cutout?

Jhoe · Aug 11, 2003

It was feeling like fuel cut, but only not as bad as I've felt it before. Im not gonna know if I'm leaking for a while as a blew a timing belt on the highway and now I see I have rocker arms laying beneath my valve cover....time for some more work...

Max'd out airflow? Turbo turned into a n/a...

Jhoe

Jhoe

James92TSi

shabby

Jhoe

James92TSi

Jhoe

noreaga0221

Jhoe

James92TSi

ATF 2GTalon

Jhoe

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