98 4.0 OHV MAF Housing Mod, rough idle, Some clattering & Droning
Hi guys, I have at 98 ranger with the 4.0L OHV, auto, 4x4. 43K original miles. Fuel Filter just changed.
Several of the folks on this forum have done the Mas air flow sensor housing mod (port and polish)..
Well I was one of them and I cant tell if it is effecting my truck. Maybe you guys can help me out?
Let me give you a background, apparently myself and the previous owners of the rig did not know the thermostat wasnt working right. The truck never got warm so it always idles a tad high (1100-1200rpm). I ported and polished the MAF housing and then I fixed the thermostat. Now it seems to idle a little rough.
If I unplug the MAF the engine sputters a moment and then returns to a normal but slightly higher idle. It seems smoother than when it is plugged in though. The strange thing is that through this whole process of plugging and unplugging the check engine light never even came on? I even left it unplugged and restarted the engine.. No CEL.
So besides the annoyance of a rough idle and poor gas mileage, have any of you with this mod experienced this?? Should I be looking for a new housing? It was a royal pain to port and polish, it would be a shame to have to buy a new one.
The other thing is that this truck has the original plugs/wires/O2 sensors. It was suggested I change them to try and bump up the fuel economy, do you guys know where I can get quality replacements for a good price? I am also trying to find the small brackets to mount fog lights to the front of the truck (in front of the grill) do you know where I can pick those up?
Another crazy thought I had is when the engine was always running cold I would hear a clattering in the engine, someone was saying it is piston slap?? After the thermostat was fixed it still clatters.. Little less than usual when warm but its there. I wonder if there is something else wrong? Dont know about you guys but noises have always bothered me.. There is an odd droning noise at idle in park sometime too.. Very odd. But hey its a ford right?!