Monkeys Got to the Spark Plugs on My Mustang GT


Made by Monkeys

Re: Spark Plugs might not last as long as you think!!!

10/6/2011 6:55:48 PM

Your praise of the Bisch Platinum Plus 4 spark plugs caught my attention… I put a set into my Mercedes 400E. It’s old, but still a great car. I put in new distributor caps and rotors and some good spark plug wires while I was at it… Figured I was done with that for quite a while.

Less than 6 months after I had done the tune-up, it started missing. The car is a 1993, so the computer is not as sophisticated as some newer models. I do have a special code reader for the Mercedes, but it showed no faults in any of the systems.

About 6 months before I had done the tune up, I had to replace the engine wiring harness. This is a common problem with Mercedes of a certain vintage; the German government dictated that everything plastic in the car had to biodegrade in a landfill, and the engine wiring typically disintegrated at some point… I looked into a new electronic throttle actuator, but at $1000 I thought i would wait until it was really bad.

So, I assumed that it now needed the electronic throttle replaced. So I bit the bullet, bought the $1000 part and spent about three hours cussing at the guys that designed the thing. And when it was all back together, it still had the miss.

Searching online, I ran across a lot of complaints about Bosch getting really cheap with the Platinum plugs; they were now junk. So I decided to pull the plugs and see for myself. They were terrible! Almost all the ground electrodes had all but dissapeared! Those Bosch Platinuim Plus 4’s sucked!

I replaced them with Nippondenso Platinum’s, and the car has been perfect since…

I will never buy Bosch spark plugs or oil filters again… They are crap!

Monkeys Got to the Spark Plugs on My Mustang GT

Greg Stirling  
10/6/2011 4:16:26 PM

Too bad about the spark plug thingy on that doowackus under the hood in the front of the car. 

Maybe a special fuel additive that cleans the threads prior to the tuneup.  Or we could just remove the heads, send them out to get them bead blasted and reassemble.  Along with simple instructions to perform this operation for the avarage motorist…

But we have to admit – that is a cool flame paint job on the valve cover and headers. 

A Total Chick Magnet..

We can now burn like a Disco Inferno…

Re: Spark Plugs might not last as long as you think!!!

10/5/2011 12:24:00 PM