|
__________________
Purge is Regeneration.. Same guy , different name.
OK..on that chassis:
Behind the driver headlamp is the ABS pump..and behind that pump is a little valve that says "MOT" on top of it. That is it and there is a vac line [ fairly good sized] feeding that to the intake. The other vac line goes to the canister.
That valve is suppose to pulse rapidly [ 5-20htz ] to allow canister fumes to re-enter the engine [ regeneration]...but they do it in pulses so the engine does not see this as a large gulp of air, [ they meter it ], as to not effect the idle and A/F mixture control system. What can happen on these is they get crap in them and they intermittantly stick open and the engine sees this as a vac leak, resulting in intermittant rough idle. So, if you just disconnect/plug it and the engine acts nicely to that change, you can assume the valve was at fault and you do not have to do all kinds of Purge control test. It is fairly common and this is just a shot/stab at your condition before condemning the MAF, as any unmetered intake air will cause your complaint and I hate to see a MAF changeout before checking some of the other simples...
Worth a try. Just diss the purge code youare going to create.
__________________
A Dalton
|