Some success. I have replaced all the vacuum lines for the EVAP/Purge valve system and another Purge Valve with OEM parts from a PnP. This is the line that originates at the (1999/2000 year) intake manifold's center nipple (approx: 1/4 " or 6mm diameter). I also reused the original 3-way adapter (se...

So I just drove 500 miles today. The LTFT diminished to 8.5% when driving at 2500 RPM (about 70 MPH). BTW I used a Bluetooth OBD2 dongle with an Android phone application. This let me keep the console lid in the mostly closed position without stressing the connector cable from my OBD2 reader. In sto...

Some engines actually split the 4 cylinders into two sets. I would have thought bank 1 & 2 but I guess it could be 1 & 3. I would also think that this system would have more engine control sensors to measure performance of the different "banks"

I thought I had made progress in getting the LTFT down. It was operating at 8.6%, down from 10.2% after some other vacuum line replacements but it has returned to 10% during local stop and go driving. I have tested the performance of my fuel injectors by using an injector pulse tool and fuel pressur...

Some success. I have replaced all the vacuum lines for the EVAP/Purge valve system and another Purge Valve with OEM parts from a PnP. This is the line that originates at the (1999/2000 year) intake manifold's center nipple (approx: 1/4 " or 6mm diameter). I also reused the original 3-way adapter (se...

Latest update. On the cycling of the purge valve I swapped valves with no difference. I then decided to check the previously replace 2 size vacuum line that comes from the center of the manifold to a T fitting. This contained the line that split along the length of the larger of the two lines. In th...

Since fixing a large split hose providing vacuum for the purge valve I got rid of my P0455 code. Checking the STFT and LTFT my 1999 S70-GLT is sitting at 10% LTFT. No check engine lights. I began a quest to try to get the LTFT lower. I smoke tested the engine twice and found 2 small leaks. One was o...

Here is a link to the Youtube video of my smoke test.

I just have to mention that you could have a LARGE vacuum leak on the line that connects to the intake manifold near the middle then goes to the drivers side into a T fitting. The size of the line is different at each end because there is an adapter in the middle of the line. Small line at the nippl...

......I ran additional smoke test using my home brew machine. Smoke appeared from the intake pipe down near the PTC valve just after the nipple. As it is a PITA to remove and replace. I tried the propane gas trick to see if when the engine ran it would suck in propane and change the fuel trims. Ther...