Question about Bosch 1991 Alfa Romeo Spider Veloce 2.0L Alternator - Remanufactured - 65 Amps
This is my second set of Bosh Platinum +4 plugs. I bought the first set several years ago when they first came out and they worked great. Last month (November 2013) I tuned up my 1991 Alfa Romeo Spider Veloce and put a new set of Bosch Platinum +4 plugs in preparation for a trip to Arizona, about a 1,000 mile round trip. The car ran great and I averaged about 29 M/G. This Christmas I was about 55 miles from home on the I-15 which is a 70 MPH speed zone, I was going about 75 MPH, when my car suddenly lost power, but I was moving along good enough to make it to the next exit. After trying to figure out what the problem was, I decided to remove the spark plugs. When I removed the plug from cylinder #2, all of material of the plug which extends into the combustion chamber was gone. I got out my magnetic part pickup tool and put it into the plug hole in a effort to remove any fragments, after moving it around a little, the tool went down past the top of the piston, indicating that there was a hole in the piston. It cost me $320.00 to get towed home and I will have to totally rebuild the engine. Now that I see that another people are having problems with the Bosh Platinum +4 plugs, I think that Bosh should step-up-to-the-plate and take responsibility of this flaw in their product and reimburse us victims for our expenses.
If the plugs were the correct heat range, and it only happened to one cylinder, you could bet the house on it being a over lean mixture on that cylinder.
Posted on Jun 23, 2015
Sorry this is caused by a very lean running cylinder due to either
A) a vacuum leak
B) fuel delivery
C) exhaust leak
D) to much ethanol in fuel
Posted on Dec 28, 2013
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Posted on Jan 02, 2017
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