So I just had to get my tranny rebuilt so it's all nice and spiffy, but now I'm starting to have issues with my engine. It's a v6 4.0 sohc. I wanna do some work to make it run better. Im gonna be driving my truck to South Carolina and Florida this summer and I live in PA so I want to have my truck running good and clean.

What are some things I can do to my engine. I guess a tune up, is where I should start but again any advice would be great.

 

what kind of issues are you having?

i'd just keep all your maintenance up to date.

 

Mpg is terrible. Probly getting 9 or 10.

I've had 2 rangers before and the one I have now just doesn't perform like the others. It would be nice to get some more power out of it. I'm will to fork out the cash but I'm not sure where to start.

 

Before you do any seriose work i would do a tune up
oil and filter change (mobil1)
plugs and wires
K&N air filter (panel)
fuel filter
PCV valve
also take it to your local dealer to get the new PCM update for better mileage

 

clean the throttle body as well and run some injection cleaner through the gas tank.

If you get new plug wires, check out underdog because they are closing next month and everything is on sale. they have black or red I just bought the last blue (for the 01+4.0 anyway) here's a link if you'r interested. only $25 plus shipping for a set of 8mm plug wires.

red: http://www.stuffforyourranger.com/st...c9fe3d88e81215

black: http://www.stuffforyourranger.com/st...c9fe3d88e81215

 

Don't run a K&N, the oil in it will gum up your MAF sensor and make it run even worse.


What type of gears are you running and what size tires?

 

mine hasnt in oh say two years

 

Have you ever added oil to it?

 

no....

 

There you go, as long as you don't drench it in oil they are ok. But if you oil them like they say to it will literally cook your MAF.

 

well they say to every 40k i havent got there yet. i'd think if people were having issues it means they aren't doing it properly though.

 

My truck is a stock 2004 fx4 v6 4.0 I have a k&n cold air on it and that is it