So I bought my 01 Durango 4.7l last December, just got my taxes money and want to make some changes on car. looking to see if I should replace my sensors because the last owner says all are from factory. no code on car and tune up has been done so no real problems, but I have to cash and thought I could. Car does have a somewhat 'light' rough but nothing big. any advice which sensor I should change or just change all, (engine and trans)thank you in advance

 

IAC is usually the number one issue,but,thats mostly cause it gets plugged with carbon,honestly though,if its running fine with no codes,id spend the money on something else...

 

If it ain't broke don't fix it.

 

How many miles?

 

Do Not look for stuff to spend money on. Things will pop up in due time. "Follow the codes, Luke."

 

my dursngonow has 242000 miled

 

Well I would replace the spark plugs with cheapo Champion Copper plugs gap .040 before install. If she runs right after that then call it a day. If not maybe get a hold of www.rockauto.com and order yourself new Pre-cat 02 sensor/s. OEM is manufacture is Desno and what we recommend and half the cost.

Possibly a can of Seafoam in the fuel.

Other than that which is a basic tune up for the 4.7L there's not more you should do. One thing however is fluids, when and how many miles ago would be my guess.

Engine
Trans
Transfer case
Axels
Brake
Power Steering
Coolant

These things are often overlooked.

 

That's a tonna miles-if u aren't good at saving and that's why u want to put sum money in her while u have it I would do the fuel pump if its never been done-fix any oil leaks like perhaps your valve cover gaskets im sure are leaking-and the idle air control sensor likes to cause issues and not always set a code-a full tune up of course and your serpentine drive belt if its never been done--- And if u still wanna do more change your thermostat and do a full cooling system flush-

 

Jeep TCM upgrade is worth th upgrade.

I wouldn't fix things without then showing signs of failure. The previous owner may already replaced some items prior to your arrival.

Today I used brake cleaner to clean my IAC sensor. Smoothed out the idle, again.

 

I second what PublicHair said. Buy a TCM from a 2003 Jeep with the V8 and swap them out, BOOM you get another overdrive.