engine light on. P0171,P0174
 

Hi Everyone, thanks for the forum. I read one post to replace my door latch which was successful :) thank you.
I just bought this 2001 ford explore sport trac over 180k mileage. engine light on. P0171,P0174. I replaced new egr valve, new DPFE EGR Pressure Sensor, new air filter, cleaned MAF, cleaned throttle body. after all this, engine light is still on. still P0171,P0174. I made a smoker machine to find vacuum leak. It seemed no leak, except smoke came out from egr air bleed holes when the smoke pressure is high. SHRTFT1(%)6.3
LONGFT1(%)25
SHRTFT2(%)10.9
LONGFT2(%)25
RPM(rpm)740,
SHRTFT1(%)24.2
LONGFT1(%)23
SHRTFT2(%)27.3
LONGFT2(%)3.1
RPM(rpm)3223.
Are those data meaning no Vacuum leak? The enginelight was triggered at first when I run out of gas. It went off at once after I filled the tank. Then the fuel was running very low again. The enginelight was back and did not go away even I filled the gas.
It seems no drivability problem. I haven't driven on highway though. New driver.
Please help. Need to make it off to pass the state inspection.
more scanner data here:DTC_CNT 2FUELSYS1 CLFUELSYS2 --LOAD_PCT(%) 25.1ECT(C) 88SHRTFT1(%) 6.3LONGFT1(%) 25SHRTFT2(%) 10.9LONGFT2(%) 25RPM(rpm) 740VSS(km/h) 0SPARKADV(o) 12.5IAT(oC) 58MAF(G/S) 4.22TP(%) 18U2SLOC B1S12--B2S1-O2B1S1(V) 0.18SHRTFTB1S1(%) 9.4O2B1S2(V) 0SHRTFTB1S2(%) 99.2O2B2S1(V) 0.7SHRTFTB2S1(%) 12.5O2B2S2(V) 1.275SHRTFTB2S2(%) 99.2OBDII

Is it normal smoke coming out from under the diaphragm of EGR valve while do a smoke test? This happened to my old EGR valve, then a new EGR from Autozone, then this new EGR from parts greek. I returned the one to Autozone then bought the second new EGR valve. Now I'm wondering if the smoke air pressure I put in through parking boot hose too big that it pushed down the EGR rubber diaphragm down and smoke come out? I did not see other people's EGR smoke on youtube video. Is EGR a sealed system, smoke should not come out? Thank you very much

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