So i bought a 2000 3.0 a month and a half ago, and about two weeks after i got it, it started a nasty spark knock. I've changed the plugs and wires ( which were original, 79,000 miles), changed the oil and filter, pcv, air filter, egr sensor (irrelevant i believe) ran gunk out through the gas, ran seafoam through the brake booster vacuum line, cleaned the wires on the maf, and its still doing it. I did the plugs and wires, and cleaned the maf at the same time, and it stopped for a little over a week, but now its back. Any help is much appreciated.

 

try running seafoam through again.

 

i just did that today. is it ok to do it again so soon?

 

bump

 

anybody?

 

I've just suffered with mine and learned to rev it out a bit when climbing a hill. Easier to do with a stick but it seems to work for me. I have yet to find the way to make it stop. I think the problem is the fact that its a 3.0.

 

Have you tried a better gas?

 

lol yeah i tried reving it out, doesnt help much, and yes, i bumped up to 89 instead of 87 on saturday, and still no change. i really wish i would have gotten a 4.0.

 

How much old gas did you gas tank still had when you refilled it with 89? Mine knocked for a week after a switched to a better gas and then it stopped.

 

i was pretty close to empty, and i put a half tank in of 89. i think i may try to sea foam it again today on my lunch break.

 

was your also puffin out smoke, while it knocked?

 

Not at all...

 

well mines puffing out smoke along with the knock, the smoke is usually a bluish grey, which im told is unburned fuel, and once in a while, a puff of black smoke. any ideas? Thanks for the input so far btw. much appreciated.

 

Get the codes pulled and post them here.

 

will it throw codes without the check engine light on?

 

Yes

 

ok, ill have them posted in about an an hour.

 

went up to autozone after work, put a obd2 on it but it didnt show any codes. how do i get codes?

 

if the check engine light is on than you should have codes. instigate the condition again and get the light to stay on before you get it checked out.

Either that or your fuse is burned out..in which case the obd2 tool wouldn't power on.

 

lol no, there is no check light coming on at all. and the fuse is fine.

 

Put a can of seafoam in the tank.Also buy a can of seafoam deepcreep and remve intake tube at throttle body and squirt the throttle body down following directions on the can.should have good results by the time you run thru the gas.does same thing as putting it thru the hose but take a little longer and is probably a little safer for your engine doing it this way.

 

Thanks, i ran 2/3 of the bottle through on my lunch break this afternoon, through the vacuum hose again, didnt seem to help, but i just went for a drive for about an hour, and i didnt notice it once. so as of now its fixed. either the seafoam or the 87 finally ran out and now just 89 is goin through.

 

If its smoking that's something else... Like water in the tank bad gas kinda stuff. Or bad o2 sensors..

 

i was told that the smoke was from the combustion being messed up, but the o2s are original, and probably should be changed regardless.

 

nvm on it being fixed, it happened almost all the way to work this morning. Any one wanna trade me for a 4.0?