I installed the NGK BKR6EQUP plugs a couple weeks ago. When I removed the "old" plugs I saw that they were the Bosch Platinum 4's and they looked to be in excellent condition. So I put in the NGK's. The only difference I've noticed is that the car now has trouble idling when I first start it up (the rpm's will drop way down until the engine almost dies and then the rpms jump up and save it). With the Bosch plugs, the engine never sputtered once, not even on the coldest winter days. I'm considering putting the Bosch plugs back in.
Stay stock. There is no significane advantage with these other spark plugs. The platinums will only burn hotter. Ask any good bmw mechanic and they will verify this.
The only difference I've noticed is that the car now has trouble idling when I first start it up (the rpm's will drop way down until the engine almost dies and then the rpms jump up and save it). With the Bosch plugs, the engine never sputtered once, not even on the coldest winter days. I'm considering putting the Bosch plugs back in.
Sounds like a bad connection between sparks and coils. If putting old sparks in doesn't help, you'll need to clean and/or replace connectors...
Sounds like a bad connection between sparks and coils. If putting old sparks in doesn't help, you'll need to clean and/or replace connectors...
Thanks, I'll take that into consideration. Also, the NGK's came pre gapped, but could the gap be off? I looked at all of them before I put em in and they all appeared to have the same gap and I torqued them to the recommended setting.
Comment