03-12-2016, 05:11 AM
Fixkick
once again , thanks for your reply
O.K. truck "stumbles " when i apply a vacuum to the EGR at hot idle.
I included my smog test reports per your instructions.
test #1… timeing @ 8 deg. BTDC 87 octane gas started to over heat (no fan ) new cat
%CO2 %O2 HC (PPM) CO (%) NO (PPM)
Test RPM MEAS MEAS MAX AVE MEAS MAX AVE MEAS MAX AVE MEAS RESULTS
15 MPH 2023 12.5 3.0 97 35 21 0.79 0.07 0.0 568 183 1273 FAIL
25 MPH 2372 12.8 2.9 62 22 16 0.96 0.09 0.0 821 232 994 FAIL
test #2…. timing 5 deg. BTDC 97 octane gas fan rewired for continues running
15 mph 1967 12.5 3.1 97 35 27 0.79 0.07 0.0 568 183 939 FAIL
25 mph 2325 12.8 2.8 62 22 15 0.95 0.09 0.0 821 232 814 PASS
test #3 new EGR valve New EGR modulator
15 mph 1980 12.9 2.5 97 36 32 0.79 0.07 0.01 568 183 1581 FAIL
25 mph 2315 13.0 2.2 62 22 29 0.95 0.09 0.01 821 232 1497 FAIL
once again , thanks for your reply
O.K. truck "stumbles " when i apply a vacuum to the EGR at hot idle.
I included my smog test reports per your instructions.
test #1… timeing @ 8 deg. BTDC 87 octane gas started to over heat (no fan ) new cat
%CO2 %O2 HC (PPM) CO (%) NO (PPM)
Test RPM MEAS MEAS MAX AVE MEAS MAX AVE MEAS MAX AVE MEAS RESULTS
15 MPH 2023 12.5 3.0 97 35 21 0.79 0.07 0.0 568 183 1273 FAIL
25 MPH 2372 12.8 2.9 62 22 16 0.96 0.09 0.0 821 232 994 FAIL
test #2…. timing 5 deg. BTDC 97 octane gas fan rewired for continues running
15 mph 1967 12.5 3.1 97 35 27 0.79 0.07 0.0 568 183 939 FAIL
25 mph 2325 12.8 2.8 62 22 15 0.95 0.09 0.0 821 232 814 PASS
test #3 new EGR valve New EGR modulator
15 mph 1980 12.9 2.5 97 36 32 0.79 0.07 0.01 568 183 1581 FAIL
25 mph 2315 13.0 2.2 62 22 29 0.95 0.09 0.01 821 232 1497 FAIL