99-00 V/S/C 70 VVT solenoid question (Part 2)

[scot850]

I had thought that maybe trying them as suggested, but it is a lot of work and effort. Easier just not to pull them. I'll keep the 4 with the <20 ohm resistances for emergency spares and junk the other 2 (no continuity and >600 ohms).

The only car I have is the 'R' to try these on, and it only has the Exhaust side VVT. As the car has not turned a wheel in near 11 months it is hardly a test bed...........!

Neil.

[scot850]

I will now take my foot out of my mouth for a while!!

I decided for the heck of it, to pull out my power supply and try and cycle the VVT solenoids to see if they acted any differently between the new and old style versions.

(Side note: It dawned on me you can service the new 180 degree connector style. They have a retaining screw between the solenoid and the valve body!!)

Despite the differences I was getting yesterday between the units in term of resistance, they all worked as they should except the one that had no continuity, it stayed dead.

The strangest thing though, is that after cycling them, I decided to retest the resistances on them all, including the one with the high resistance. The strange part? They now all tested in the 5.5-6.5 ohm range!!?? Even the one that had shown high resistance!

At that level, with my cheap tester (I also found one of the test leads was not fully seated!) they may well be closer to spec than I expected so I will now keep them all as good to go.

The other interesting fact is all the old style ones are date stamped as 99, and the newer ones are 03 and 11. They were all reading the same!

EDIT:

Today I had a few minutes to spare in the garage, so decided to get my more expensive digital circuit tester to test the resistance on some of the solenoids. The multimeter self adjusts the range and when it settled it showed 4.0-4.2 ohms on both new and old VVT solenoids. The weird thing, the one that read up the 600's then dropped to the same level after electrically cycling was back up around 400 ohms?
I'm guessing something funky is going on with that one although it cycled just as quickly as the others when I electrically loaded it.

Neil.