Bosch Platinum plugs

[Compufreek]

I tried using them a while back and when I took them out I found the pin hole where the platinum used to be empty. How the hell did I melt them? I have also notice that my plugs come out with a red tinge to them. From what I understood that meant the plugs were too hot. What do you think is going on?

[Anonymous]

Bosch plugs just don't seem to work well with our DIS systems. I had the same problem with a set of them once, I went straight back to AC Delco stuff.

[RacerX11]

You really shouldn?t run the Bosch Platinums with any waste-spark DIS ignition system. I ran them on my 2.8V6 with a distributor for years, and was very happy with the performance, and the fact that they held their gap longer than the AC?s.

On the DIS-equipped cars, they are a no-no. The Bosch Platinums have a standard ground electrode, but the center electrode is mostly ceramic, with a thin wire of platinum down the middle. The DIS systems fire half the plugs backwards from the other half, and this causes the center electrode platinum material to erode.

You best bet is to switch back to sonme AC?s, or a set of NGK?s.

Marty

[Homer]

Bosch plugs only seem to work better on average on chryslers and german cars. I like sticking to the rule of using motorcrafts on fords; ac delcos on gms; and either champion or bosch on chryslers.

[Compufreek]

I run NGK's now and they work great but still get a bit red, should I go to a cooler plug?

[Cliff8928]

I run ACDelcos on my vehicles... I've had the ceramic fall off a bosch before (the bosch super, which was in my car when i got it)

Cliff Scott
89 BerettaGT <-ACDelco Platinum
89 Volvo740 <-ACDelco Rapidfire

[cutlassdude96]

Im running AC Rapidfires on mine.

[Invasion1]

Don't buy Bosch Plat. plugs

i had them for my 1992 Cutlass 3.1 and they caused me lots of problems...

after a few weeks i had poor idle, stalling and all round shity performance

i had lots of repairs done to fix this problem and it ended up being those damn plugs

I have AC DELCO Rapidfires and there great


dave

[v6h.o.]

i only ever run regular AC Delco's in mine. as with everyone else, i'd 100% agree that the bosch are junk! know from experience as well. stupid plugs.

[RacerX11]

I don't think they are junk..they just don't work with a waste spark DIS ignition. I highly reccomend them for older, distributor equipped vehicles.

The first 3 years I drove my X-11, I had to replace or re-gap the AC's once a year. I would install them at 0.045", and a year later they would be at 0.065", just like clockwork. I installed a set of the Bosch's, and ran the same set for 4 years without re-gapping them. When I pulled them out during my motor swap, they were at 0.046".

Marty

[Homer]

The only people that seem to be promoting bosch are the parts stores, and I just happen to work at one, lol. From my experience the only bosch products that seem to work on newer GMs are the wiper blades, lol.

[mmcdjs]

I had a set of plus 4's in my car and man did they run hot! I think that they screwed up my stock plug wires too! I just put a set of 8.8 MM wires and the stock AC delco plugs. Car runs and idles much better.

[GPXSS]

Bosch's are good in Nissans and most imports.. for GM id say AC Delco plugs all the way.

[all4gss]

not running bosch 8 dollars a piece spark plugs with waste-spark DIS ignition systems makes perfect sense to me. But what i dont put together is how a plug can work better or worse in a different engine design. A good plug puts alot of fire out there right? Doesn't the ignition module control the rest? I run AC delco on most of my stuff, but only because they're cheap and if you break them, they break clean and wont crack. I had one plug crack but not break and cause a mis, took me three weeks to find it (i had just replaced the plugs) I've got a set of plus 4's in my 350 vortec engine, yet to fire her up and get her tuned, but these plugs were cheaper than the AC delco replacements.

Just my thoughts..

keith

[montecarlols(z31)96]

i have heard that our cars DIS system has too much spark for the bosch, there was a big argument over this at mymonte.com that eventually got locked because people really started to get mad