Regarding TSB 00-24-8 (3.0L pinging), I notice that the bulletin mentions changing both the ignition coil and PCM assembly. Is it absolutely necessary to change both out? Has anyone here just changed the coil and found success? If I do decide to pursue this route, I'd like to go the cheapest/simplest way.

My '99 Ranger has been pinging on and off. I switched to 89 octane and it pretty much went away, although it comes and goes from time to time. I'd like to go back to 87 to save on the cost of gas.

Anyway, any help appreciated.

Keith

 

I'm sure that someone has first hand experience with that problem.
I run premium in my 2.3 Ranger for the added power and gas mileage. I'm still waiting for someone to provide proof that running 91 octane in a vehicle that's supposed to run 87 causes excess carbon build-up.

 

I would start by cleaning the MAF, thats what I plan to do with mine when it gets warmer.