Dear Mr. Kilmer, Trust all is well.
Most recently the Fox started surging at idle especially it seems after I drove it any distance. When I stopped to park it it would surge.
A possibility was the Idle Boost Valve/solenoid part# 026906283C. I have not been able to test it. I did mess very gently with the idle mixture using a 3mm long t-handle hex wrench. But was told to use/build a DPR test harness (which I don't have) so I can read the current that the ECU is sending to the DPR - at idle/operating temp it should fluctuate between 4 and 16 milliamps. I installed a new BOSCH CTS which helped considerably. Now, when the car is first started (cold) it doesn't idle normally for lets say 30 seconds and giving it a little gas seems to help it stabilize. Once that stage is over it will start and idle smoothly and what I would consider normal the rest of the day until it sets lets say overnight. I could live with this, but its not the way these cars idle and I've had 3 of them in the last two decades. Might changing the oil have any bearing in this?
So, I would very much appreciate any suggestions or ideas about how to get the FOX totally healthy again.
Thank You! Keep up the great work...
kind regards, Raphael
{black}:wink:
Man that thing is older to hell but I can tell you from my experience of old foxes the fuel distributors generally need to be rebuilt with new seals and rings and then reset
Thank You Scotty!
How much more do you know about the CIS injection system? The Fuel distributor was recently replaced so I don't believe that is the issue.
Idle boost valve/solenoid kicks in when the rpms fall below 750. The Bentley Manual is the *bible* for VW's and if have one on hand checking that briefly might help refresh your memory. Just a thought.
My recent test findings is that it will start and idle without the Idle boost valve/solenoid connected and powered. It tends to run a little bit rough when it's first started unless I give it some gas just above roughly where the idle would be set. Within 30 seconds it will smooth out and idle, but the idle is a little low and there is *NO surging *(a good thing). It should start and idle with the Idle boost valve/solenoid connected and powered.
I plan to replace the plugs, distributor cap, rotor and change the oil as well as the fuel filter. Would fresh oil and this basic tune-up help this situation do you know?
Hope this has done some good and will help someone else out there.
Any other suggestions appreciated!
Kind regards,
Raphael
{black}:wink:
Hi Scotty!
Whats the good word?
Thank You!
Best, Raphael {black}:idontknow: