I just bought my wife a 1998 Club Wagon XLT E350 15 passenger van with the Triton V10. It's got 27,000 miles on it and I consistantly get 15 mpg on the highway with all 7 kids and their gear with the A/C on most of the time. That's just FYI. Now for the question:
Does anyone know what Ford puts in the engines for spark plugs? And would I gain anything by putting a plug like the Bosch Platinum 4 in it? It doesn't accelerate as smoothly as I think it should. I've already put in a K&N air filter. That seems to have gained me about 1 mpg, trivial but worth it. I plan to pull a 30 foot camper with it and I want to have it all set up before next summer's camper season.
They are now putting platinum plugs in them, I don't know about 98's. Ford sells their own brand which are very good. As far as the new Bosch 4 probe design, I have not heard any feedback on them. One important thing to remember with the new plugs. Just because they are advertised to last 100k miles, doesn't mean they will. And you MUST take them out every 20k or so miles, clean and never-seize the threads. Otherwise they will never come-out when the miles roll on. I ran the platinum in my car, replacing them every 80k miles. They were beat-up by then, but worked better than the regular plugs. You should also have the tranny fluid changed before you tow, it's just a good precaution. If it still runs rough after that, you might check the plug wires. They might look good, but that doesn't mean a thing. Heat and time kills them.
First V10 engins dont have plug wires they have coil on plug design. One coil per plug.Second I recomend to stay with stock motorcraft platium plugs. The number should be on VECI decal in engine compartment.I have seen a lot of problems with aftermarket plugs causing hard start rough running MIL lights and pinging. Third good luck trying to replace them on a van. Also whats wrong with 15 MPG on a van with a V10. Most people I talk with get olny 10 to 12 MPG.
Yes, I do have the coils-on-plug setup. I'm very happy with my 15mpg and that's not my motivation for change. Since I'll be pulling a trailer, I just wanted the best performance setup I can get. I've got the 3.73 with the 4 speed O/D tranny. I drive very conseratively when on the highway usually only 5 mph over the limit using the cruise control the whole way. I plan to put the Superchip in it before I start towing and a different muffler was also suggested. Thanks for you feedback.
First, Bosch are not "aftermarket plugs", they are one of, in not the # 1 plug in the world. Installed at the factory on the finest vehicles in the world, Porsche, Mercedes, BMW and so on. They were the first maker of platinum plugs if my memory serves me well. 2nd my brain faded on the plug wires. It's going to take a while to remember that the truck doesn't have wires.