What is the anserto 845,001rouand to the naerist thousand

The first thing to check is the oxygen sensors. They are supposed to be changed every 65 thousand miles or so.

You sure it is coming from the lifters ? The injectors make the same kind of noise. But you can try changing the oil more often every three thousand miles is what is recommended instead of the five thousand like some people tell you. I have a 1998 dodge 5.2 with 199584 miles on it no problems changed oil every three thousand miles.

When was your last oil change? Is the proper viscosity oil in it? Modern engines do NOT like oil other than what over-paid engineers have designed it to use, and NO additives. Have the Oxygen sensors checked. They could be leaning out the engine. My personal vehicles get the oil changed every 3 to 6 thousand miles, without fail. I've spent thousands of hours trying to convince customers to change their oil more often than 10 to 15 thousand miles to no avail.

this depends on how you drive and how many miles you have on your car and what type oil you are using, on a 1994 you should do a tune up every 30 to 40 thousand miles. You need to do a engine clean then change oil. if you use a good quality oil you can go every 3 to 5 thousand miles on changing oil. You need to change the oil in the drive train after 30 thousand miles and the transmission oil and filter should be changed every 30 thousand miles. Also the Thermostat and antifreeze should be changed every two years to make sure the anti freeze is still lubricating the water pump. Failure to change antifreeze has burt up more engines than I can recall. Check oil in the morning when cold. Check the transmission oil when hot and in park. If you want more detailed information post here.

Its sounds like your trans clutch plates are wearing out try thicker oil or it may be time for a serious replacement

If you check and drain your oil that's where you'll find your answers its supposed to be bright red not brown or smell like burnt so its a start to begin checking

It's probably not the fuel filter. I would suggest replacement sparkplugs, and wires, since you did not nmention these items. Also, use plugs from a Toyota parts dept. If you use anything else, it won't run properly.

Plug gap is 40-45 thousands.

should be 39 to 44 thousands depending how the old ones were burning..

You should change your oil & filter every 3 to 5 thousand miles. The more frequently you change the oil, the more life you will get out of the engine. Rotate the tires every other oil change. Replace the air filter every 15 thousand miles. Flush the cooling system and flush the transmission (automatic) every 30 thousand. Change the iridium plugs every 90 thousand. There is no timing belt to worry about, that veh has a timing CHAIN. That is basically it.

Hi robrtsn,
As you forgot to say what the engine is in your 4-Runner....I'll give you the rule of thumb....if you have a timing chain in your engine, you'll need to check it only if it becomes noisy....If you have a timing belt, the manufactures recommend that it's replaced every one hundred thousand kilometers.....thats about sixty five thousand miles.... I believe that the later vehicles...(those with the electronic odometer fitted) have been extended to one hundred and fifty thousand, but to be on the safe side, I'd replace at one hundred thousand, especially with the number of sub standard parts that are available on the market these days....

Hope that's a help

Best regards Johngee10