While idle, Every 30 seconds or so, my engine drops a couple hundred rpms for about a second, like it is about to cut off. It then regains its rpms, and all is fine. I didnt notice this problem until after my body lift and super 44. Im not sure what the problem could be.

 

Oh and to add. After the muffler and BL, i noticed a loss in power. Could this be a backpressure issue?

 

Did you get bigger tires...? as the loss of power

And how large did you go on the pipes?

 

no new tires...yet. pipe runs 2 1/4 from dual out muffler, dumped after rear axle.

 

Also i lost some throttle response. I even zip tied the slack in the cable.

 

bump. any idea guys? Truck lacks some guts and snappyness i had before the bl and exhaust.

 

just a thought what about the plugs or your maf just a thought to help

 

Well if it ran fine before you did that stuff, its a pretty good chance that changes you made caused the issue. I don't know about pipe size, but is that too big possibly and causing back pressure issues? Did you look up stuff about what pipe size to use before you did it?

 

Actually I've noticed the same thing happens to me when I sit on a steep incline. All of a sudden every couple seconds it will drop to a sputter then kick back up.

I've never figured it out

 

The pipe size is the same I have from muffler back with no problems. More than likely a sensor was damaged or unplugged while doing the body lift. Changing a muffler won't create idling issues. Your lose of power is most likely caused by the idle issue... Which is probably a sensor of some sort

 

Im not too knowledgeable about sensors. Where do i start?

 

Yeah. I only have the pipe 1/4 of an inch bigger than the previous setup. And it only has about a foot or two less of pipe than before (its dumped) I need an all around checkover i guess.

 

Changed the fuel filter (i dont know how long the last one had been in there) I planned on changing plugs the other day. Nobody had motorcraft plugs (out of 4 stores). Anybody know of best plugs for our 4.0 SOHC?

 

Idle Air Control on my truck was shot, made it bounce around at idle and the truck wouldn't take off very fast but would suddenly get power after it fell on its face. IAC for short. Ontop of throttle body

 

Did you replace it? If you did how much did it run you, and did you replace it yourself?

 

I replaced it myself it was a 40 dollar part at O'Reiley Auto Parts. It is held on by 2 small 10mm bolts I think.

 

Still learning here. Which plug is the MAF? I see two line running out of the intake rite after the box with the filter. I unplugged one of them from the intake, and the truck ran like CRAP. These is another weird plug/hose thing further down....what is that?

 

The one you unplugged would be your maf plug the other is the crank case vent

 

Is it supposed to run like that when you unplug it?

 

Yeah it will

 

So what ever happened with this??? I just put a BL on my ranger and having a similar problem. I was thinking it has something to do with the filler neck splice...

 

I completely forgot about it. I havnt noticed it recently though.

I just recently threw another evap code though. I was thinking about lubing the filler neck splices with a little bit of tranny fluid.

Other than that, I might have to take it in for a smoke test. My next door neighbor is a mechanic, so I might as him first.

Now that I re-read this, I might check my IAC (I never did).

 

Actually, my problem was a little different than what I first thought... It idles fine, but as soon as I hit the gas it just bogs down(no check engine light or codes). I was thinking of pulling the bed and making sure my connections are good and tight on the filler neck. Thinking maybe it has a loose line and sucking some air.