400E's miss Finally Fixed!!!!(Clogged Injectors)

[aldedmon]

Fellow 92 - 95 W124 V8 owners, I finally fixed my 92 400E's chronic missing/stuttering/hesitation.. A friend of mine is a tech for a FORD dealer and he saw my car and diagnosed clogged injectors. There's a purging apparatus (750 ml) that you fill with a 2:1 gas / solvent soln, pressurize and then purge the injectors. You have to disengage the Fuel pump and then connect this purger to the fuel rail via that valve located at the front. Let her run until all the soln is run through the rails and the car dies. Reengage the fuel pump and voila'. No more hesitation.
This is what mine was doing. Crank it up first thing in the morning and the car would have a very pronounced miss. Let it idle and the tach would rise to 12-1500 and fall back to idle a couple of time before finally settling in at idle. Take off (2 mins after first starting) and it would have a very aggravating miss / stutter . After car warmerd up, miss was less noticable, but still very much there. I'd replaced the wires,plugs,rotors,dist caps,TBA,EGR valve and all the intake gaskets/donuts and lots of vacuum lines. Seems eliminating the vacuum leaks exerbated the problem with the dirty clogged injectors. I have 190K mi's on this car and use only Exxon / Shell Supreme grades and regularly put in the techron(My friend said that this stuff is just "snake oil", as it is entirely to diluted to do any good). But still I guess at this milage level, you're bound to get some cloggage. Funny they looked fine when I had them out doing the intake. But anyway wanted to share a positive ending and instill some hope out there to all you 400E / E420 guys who are chasing down this issue. Incidentally when he first connect the purger to the car, the needle on the intake side was fluctuating +- 1-2 lbs. Gradually it smoothed/ leveled out to no fluctuating at all. My buddy said that the fluctuating was due to the clogged injectors trying to pump but instead giving off back pressure. I'm getting the 500E done this weekend as well as my V8 Bimmer. The ol' gals got spunk again. Yee haw!