I finally got around to replacing my plugs, on my 2000 F150 bi-fuel. Wow I’ll for sure be going to hell now after all the cussing I did on Sunday. And if any of you want to know I did change them without removing the fuel rails. As for why I change them it was bucking, jerking, and surging. At first only in cng then it got progressively worse. So I was thinking it was going to be the compuvalve, so I was going to just let it go until it died. Then it started doing it in gas, so I figured I would try the plugs first. And now it’s a completely different truck, anybody wondering what plugs I decided to use. They are the new E3 diamond fire plugs ($5.99 each) that have a pretty unique three-leg ground electrode. As for the power increase that they clam. I bought it used with what I’m sure were the original plugs (148,000 miles) so the power difference is amazing, but that probably has more to do with the extremely worn plugs.

 

That is sweet, hope you continue to see the same gains.. From what I heard, most plugs will work fine from the get go, but its a few miles down the road that they start having issues. When I changed my plugs at 100k, I was really hoping, if not expecting, for a performance difference... but nope, everything was the same. Except for the lacerations all over my hands and knuckles from doing the job .. by the way, removing the fuel rails was like the easiest thing ever, and made the job so much easier (on the 5.4 atleast).. why would you not remove them?!

 

the bi fuel trucks have two fuel rails that make it more difficult

 

OH, i totally forgot that you said you had a bi fuel truck...
strike my previous statement from the record..!