2002 ranger

[jeedee]

2002 ranger xlt, 3.0, automatic, 2wd. misses at idle and low rpm...give it juice and off she goes....runs fine. New plugs and wires. Codes as an e-vac problem, but doesn't act like an e-vac problem......Any ideas....?? Thanx.

 

[Uncle Gump]

What's an e-vac?

 

[pjtoledo]

codes please.

 

[mikkelstuff]

If you have never done so, replace the coil pack. My 2002 Ranger 3.0L did the same.

If the miss was at speed, then likely the cam synchronizer.

 

[jeedee]

If you have never done so, replace the coil pack. My 2002 Ranger 3.0L did the same.

If the miss was at speed, then likely the cam synchronizer.

Thanx for the info. Bought it with 84,000...not sure if it was replaced before.Will replace it now.

 

[Plasso]

I've got an '02, same engine. I have a similar problem, codes show the engine misfires on Cylinder 5 and 6 when idling, and it gets worse as the engine warms up. The engine had about 140K miles on it and the truck had been sitting for about decade.

I tried several things to solve the problem, including new wires, a coil pack, plugs, and a cam synchronizer update. I also replaced some O2, sensors, etc. None of this was a waste exactly because I am renewing the truck, but it didn't solve my problem.

I finally did a compression test, and and found low compression in Cylinder 5. A leak down test indicated that the problem is the exhaust valve. As I did more research, it seems to be a common problem with burned out valves on the 3.0 engines for 2002 at about 150K miles. I'm planning to replace the cylinder heads soon, but I need to set aside a few days to do it, and I keep getting wishy washy about trying to install headers at the same time.

Hopefully, this isn't the issue with your engine, but you may want to do a compression test before going much further.