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Old 08-19-2011, 11:32 AM   #1
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Need advice

Well after shaking enough to not see straight anymore I'm ready to fix my '02 Sahara.

I took it in to have the computer checked and to find the reason for hard starting.

it was recommended that I change my Throttle Position Sensor -$138.00
Fuel filter-$259.00
After looking on here for a while (at work) I realize the filter should last for the life of the vehicle unless I had bad gass for a while.
The TPS is something I can do easlily on my own.
No problems here.

I also have the DW (Death Wobble) and I'm going to have the tires rotated and the alignement done.
-If that doesn't solve it I will look at a new track bar or steering stabilizer.

they also recommended doing a 90,000 miles service which includes changing the oil and air filter, a coolant system flush, front axle service,rear axle service transmission service and transfer case service along with a full vehicle inspection-$548.00

The oil change is no problem. I have an Airaid filter on it which only needs to be cleaned (not sure their position on that)
all the other things I haven't done before.

What are your thoughts on changing the fluids in the axles?
The Jeep has 175,000 miles on it

Thanks for the advice i have found already!
FFJ

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Old 08-19-2011, 01:36 PM   #2
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Hey shaking is good for a newbie. Much better then over confidence. Being shaky can mean you will take the time to check out everything before you proceed. That's a good thing.

And you can get a ton of help here.

All that "suggested" maintenance is easily done by yourself on a Jeep. Nothing to it.

Take each item one at a time.

Have the tires balanced too when you have em rotated and the alignment done. Trac bar maybe, or loose bolt, doubt it's the stab shock.

As for as the hard start, most of the time it's fuel pump or the check valve on top of the tank that causes long cranks and hard starting. And don't over look something as simple as it maybe time for a tune up, another reason for hard starting. A simple fuel pressure test can tell you a lot.

A TPS, normally will not cause hard starting, it's more prone to causing hesitation or a flat spot if anything.

Your fluid changes are really nothing more then pulling the covers on the diffs to drain the fluid, replace the gasket, and refill with fluid.

Trans if it's a manual and the transfer case, are just pull the lower drain plug to let the fluid out. Reinstall the plug, pull the top fill plug, and fill up the fluid.

If it's an auto trans, Bunch of bolts on the bottom of the pan, drop the pan, and it's messy, two small bolts hold the filter on. Pop off the old filter, install the new one. New gasket on the pan and install it. Add the fluid to the proper level, engine running- trans in neutral, and you are done.

Coolant flush is a good time to replace the hoses and thermostat while you are at it.
Again nothing to it if you take it one step at a time. Drain the rad. You can buy the kits at an auto parts store. Or even the juice you add to the coolant that flushes out the sludge. Then drain it and run clean water through it till it's all coming out just as clean.

Hoses are nothing more then a pair of clamps loosened, and replace the hose.
Top, bottom, and don't forget the heater hoses. While you have the heater hoses loose, flush out the heater core, both directions to clean it out.

Since you already have the top hose off, there's the thermostat, 2 bolts and it's off.
Replace the thermostat and gasket/seal, reinstall.

Refill with coolant, start the jeep up, rad cap off (which you may want to change to)
Let it run adding coolant as it drops. When you see the coolant circulating you'll know the thermostat has opened. Top with coolant and install the cap. Add coolant to the recovery tank to the full mark.

Oil change. Run the engine to warm the oil. Remove the drain plug, remove the filter.
Take a little new oil and wipe the seal on the new filter, and install it. Hand tight only. Reinstall the drain plug. Add oil, start it up and let it run a minute or so. Shut off and let it sit so you can check the level.

While you are waiting, look for any grease fittings that could use some attention. Ball joints, maybe on your u-joints, etc. And keep an eye open for anything that doesn't look Kosher. Like other fluid leaks, something loose, broken, etc. Now go back and check the oil level.

Clean up the mess, and yourself. It probably took you the better part of a Saturday to do it all. But then you can kick back admire your work and pat yourself on the back for doing it yourself and saving a bunch of bucks. And then you'll know, if you take your time, and ask for help if you aren't sure, there is just about nothing on a Jeep you can't maintain or repair.

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Old 08-19-2011, 01:56 PM   #3
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"Trans if it's a manual and the transfer case, are just pull the lower drain plug to let the fluid out. Reinstall the plug, pull the top fill plug, and fill up the fluid."

I think it is a good idea to pull the top fill plug first, because if you don´t get it loose you are sitting with your Jeep without oil in the transmission.

Greetings from Costa Rica
Thomas
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Old 08-19-2011, 02:12 PM   #4
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Old 08-19-2011, 05:15 PM   #5
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Thank You Shelby!!!

I have a good weekend ahead of me to get some stuff and get my hands dirty.

If there are anymore tips, keep them coming.

I appreciate the help!!!
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