Vacuum leak - smoke test shows smoke coming from under the air oil sperator

[Vtx531]

Not solved!!!

I took it out for a drive and could barely make it around the neighborhood. When giving it gas, the short term trims were pegged at +25% and eventually the long term trims settled above 30% again.

Midway through when idling I was seeing:

STFT1 -19.53%
STFT2 -19.53%
LTFT1 +21.88%
LTFT2 +20.31%

Maybe a fuel delivery issue??

[Vtx531]

Fuel pressure test:

Key on ignition: 42-46 psi. Out of spec. Manual says between 52-58

Idling: 47 psi. In spec. Manual says 46-52psi

When revved in neutral throughout the rpm range the pressure is pretty steady within specs.


Thoughts???

[Vtx531]

I drove around with the MAF disconnected while monitoring the live data.

It seemed to run better with MAF disconnected. The short trims were going negative 20’s under acceleration and trying to balance out the +32% long trims.

When I reconnected the MAF it was adding more positive fuel to the short trims on top of the +32% long trims.

Bad MAF?

[Vtx531]

Now I got P0102 code. Is that just from having the sensor disconnected on and off while testing?

[blue62]

Originally Posted by Vtx531

Now I got P0102 code. Is that just from having the sensor disconnected on and off while testing?

That would be my best guess as 0102 is a MAF code.

[blue62]

Originally Posted by Vtx531

Now I got P0102 code. Is that just from having the sensor disconnected on and off while testing?

sorry double post. things like that happen when I only sleep 3 hours a night

[blue62]

Originally Posted by Vtx531

I drove around with the MAF disconnected while monitoring the live data.

It seemed to run better with MAF disconnected. The short trims were going negative 20’s under acceleration and trying to balance out the +32% long trims.

When I reconnected the MAF it was adding more positive fuel to the short trims on top of the +32% long trims.

Bad MAF?

I am starting to lean toward MAF sensor issue. You could try cleaning it with a cleaner made for the purpose. I think yours is the wire type like the one in my 2000S. just don't touch the wire. clean it good let it dry. put it back in and watch your trims. see what happens,
I had a CEL on mine a year ago. I cleaned it been good ever since.

[blue62]

Originally Posted by Vtx531

Fuel pressure test:

Key on ignition: 42-46 psi. Out of spec. Manual says between 52-58

Idling: 47 psi. In spec. Manual says 46-52psi

When revved in neutral throughout the rpm range the pressure is pretty steady within specs.


Thoughts???

not sure what to think on that. in spec on idle is a positive at least it shows that the injectors are getting correct pressure.
under spec. at key on test is the head scratcher. I believe the key on test is to check that the system is pressurizing properly for initial start up. (That is a guess on my part.)

You had not said anything about starting issues so maybe the low spec is not an issue????