I finally figured out why my 300D was accelerating slowwww

[Lenovolost]

84 300D. 465k miles. For about 6 months now my car has been struggling to get to 55 mph. It would get to 40 then slowly make it's way to 50-60. I wasn't even able to keep up with traffic. I did everything from valve adjustment, diesel purge new filters even lubes up the linkages under the hood. Nothing


I was making my way to an inspection shop all four of my tires locked up. The shop couldn't figure out what the problem was one of the mechanics told me it was likely a fauly master cylinder. Which was impossible because I had just put it on last year.



Had the car towed back to me house. I opened up the hood and touched the master cylinder it waa hot!! Unscrewed the screws at the master cylinder I could a "hisssssssss" sound as I was unscrewing the bolts (pressure was being built up inside) Something was preventing the master cylinder from fully releasing all the way.........


Well my brake booster had this little adjustable rod which I did not know existed. I shortened it about 2 cms and put everything back together. Took the car for a spin on the residential street it the results were INSANE!!!!

Slight touch on the acceleration pedal the car would go from 20 - 50 in a span of three seconds. It drove basically like a new car. Kept up with traffic very well!!

[Diseasel300]

http://www.peachparts.com/shopforum/diesel-discussion/411201-what-happening-my-car.html

So you showed the adjustable pushrod in Post 4 and everyone told you the MC was probably an issue months ago and it's suddenly "just discovered"?

[andrewjtx]

Yeah, I would've just updated the original thread, thanking everyone else for solving your problem.

This is simple diagnostics. You made a change to a critical safety system and you soon experienced problems. FULL STOP. Why would you continue to drive the car until the problem is 100% solved?

In technology (where I am a consultant), when you start seeing major problems that haven't been seen before, the FIRST question you asked is "What changed?"

[BillGrissom]

Originally Posted by andrewjtx

... In technology (where I am a consultant), when you start seeing major problems that haven't been seen before, the FIRST question you asked is "What changed?"

One wishes that always occurred, but politics can intervene. One famous case is that the large O-rings (2) which seal the joints on the Space Shuttle solid rocket booster segments were partially vaporizing on every launch, with the outer O-ring losing 30% of its mass. A camera would record the puff of grey smoke as the booster ignited. They changed the pressure-test procedure to a higher pressure and 70% of the outer O-ring was then burning up, and the grey smoke got bigger. A committee decided "Better, since the inner O-ring should be better seated". When engineers fussed, the answer was, "never been a problem in flight", which is termed, "normalizing the problem". After the Challenger failure on a very cold morning, when they had video of the big grey cloud, then flames issuing from the joint, NASA managers initially told the press, "we have no idea what could have failed".

[vwnate1]

Bill ;

A lot of problems across history were caused by the attitude you just described .