Lifter preload...more or less?
I never thought to check the lifter plungers complete travel. Kim
When I am at my wits end, I go where I should not go. This is the problem, Starts fine, runs fine. 1500 to wherever I want to go raped ape. get home to park it and tick tick tick tick. I am about to get a plastic bag and 6 cans of spray foam to make sure I am not just hearing the noisy fuel injectors.
So I am screw this MDS. I turned off MDS and it runs about the same, went to check a solenoid and it breaks. Get a "new" set from Amazon and they leaked. Screw it, I will just get the plugs for 14.00 see what happens. Misfires at 1467. MDS cylinders. Why is MDS doing anything at idle. Well, its not doing nothing, the solenoids are not energizing to depress a pin in the lifter to make it collapse, the solenoids are always on until MDS turns them off, stopping flow to the hydraulic lifters which makes more sense. So back to getting new solenoids. Leave MDS on because, why not, I have new solenoids, lets see how this is supposed to work, codes for solenoids at idle.
So as if I did not go far enough, now I am like, well, the non MDS lifters are solids, why is the lash the same on solids and hydraulics? Should not be. Aluminum heads are expanding decreasing lash when the engine is hot.
Long story short, commit to MDS delete. Pay once cry once when I already put 2 grand more than I expected into this car by doing the eagle head swap. Now I am back to maybe trying to find a lash cap for the MDS cylinders to get more preload on the hydraulics. Some people just cannot be helped.