Originally Posted by SSEBONNE4EVA
My 96 developed an intermitten skip Saturday along with a rotton egg smell out of the exhaust.
Pulled #1 plug and it had black on the side of the platinum insulator. Put my Delco back in #1 and all is running well. Would do the rest but we had a blizzard and its no fun out there. The Delco platinums only had 10k on them when I took them out.
I'm sending the plug to a technician at Bosch for analysis.
Only reason I installed these plugs was because I had them on the shelf and wanted to see if they would improve mileage. And they did.
Anyone else have Bosch fail??
You guys are right on this issue, 3800'* eat Bosch plugs..
Yes mine failed at about 7-10K... Ran Horrible... Mine got so bad that it was getting harder and harder to start, and the power and MPG'* fell off... When I removed them I had 3 that were shot...
My friends car wasn't any better... We never used Bosch again
I think it has a bit to do with the waste spark method as well as the Type II ignition system... But my friend burned them out on a Type I system... So anything goes..
Also we have seen them burned out in the same manner on the HEI system on the Chevy 305 and 350 V8'*
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