Daveinet wrote: Try SplitFires. You will get a slight mileage increase, although it may be hard to notice it. Should be ~1/2 mpg. I have documented test over a 20K miles compared to new plugs and have proven the increase in my car. Although I don't believe the advertisement, what I do believe is that the split does give better exposure to the fuel charge.
OH yeah! Now there is a good WASTE of money!!!....
2000 Country Coach Allure; Cummins ISC 330 HP; 71/2 - 8 MPG regardless
2002 Jeep Liberty
jw9927 wrote: hey i am confused, a 99 chassis 454 with a j in the vin. i did find ac delco plugs but was told not to use them to go with bosh instead. any info would be a great help..also what is the gap supposed to be? thank you
Use the AC plugs...but as suggested make sure and check the wiring.
I agree with changing plug wires. Talked to a long time RV mechanic that suggested replacing them every 20,000 miles to avoid trouble. I also agree with using AC plugs.
Good luck!
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