My 3vze 3rd gen 4runner (96!) has no power at all.
Idling is very low. You can't regulate it using a screw on throttle body.
I've checked almost everything:
compresion, wiering, almost all sensors, timing, ignition (coil,wires,distributor)
Computer see no errors.
Some times it goes well for a while, and then again goes like crap.
Help!!!!!!!!!!!!!!!!!!!1

 

You cant have a 96 runner with the 3vze, thats the 3.0 engine and was replaced by the 5vze 3.4L in 95.5..

Anyways, we need more info like exactly whats going on? When was the last time you tuned it up, have you checked to see if your coolant or oil looks like milk and your headgasket is ok?

 

My truck is 3rd gen with 3.0 vze . January 1996 (?!). This date is on metal plate under the hood.
It was tuned up about 2 weeks ago. Head gasket is ok. Both coolant and oil are normal colored.
Cars acceleration is terrible, you can't run faster than 60mph.
It started about 2 months ago just like that from no where.

 

Fuel pump and/or fuel filter ??

 

Sounds like it might be the fuel pump, the factory filter has a "fail flow through" feature... basically if the filter gets clogged the fuel flows through an unfiltered by-pass so you never get stuck anyplace... My truck was acting a little gutless awhile ago and it turned out the in tank fuel pump was failling...

 

Fuel filter has been changed during a tune up.
I'm not sure about fuel pump, because i have LPG instalation ( earth gas)
it doesnt use fuel pump, also runs like crap.

 

I drove an LPG truck once and it was horrible performance wise... I ws told you have to set up the fuel metering a so on "just-so" you may need to take her to an LPG specialist to diagnose the issue... on the other hand it is getting colder and you may have a tank condensation problem icing up the tank outlet... that happens to our fork truck we have to put it in the hanger when it gets cold out to keep the fuel defrosted...

 

Problem occured before installing lpg.
I've installed LPG becouse of very bad gas milage, but i found the problem (fuel in my country is quite expencive ) it used to take 25l/100km that is 6,7 gal/62 mile because of air leak from spark plug thread.

 

no one can diagnose it LPG specialist nor TOYOTA official service

 

In Toyota they said that it is o2 sensor because of error in computer, since then i did about 300 miles and computer see no errors. i've also checked o2 sensor in Bosh service and they told me it is ok

 

can you get your engine to match all TDC marks ?
is it possible that the belt slipped a notch or 2?

 

belt is ok. changed and checked

 

besides it sometimes run well

 

Maybe you need to buy your LPG from a different supplier, there might be some contaminants in the distributor's tank...
What country are you in by the way?

 

I was just going to ask that question...

 

LPG is not a problem here, because it also runs bad on gasoline. By the way im fom Poland.

 

It started before installing LPG. So we have to look at the car as if there were no LPG.

 

have you redone the exhaust? Could be a cracked MANI,clogged cat or all of the above. All of that will give you bad gas mileage,poor power and rough idle. Thats about all I can think of.

 

I've redone all exhaust. i removed cat at all

 

i've realized that moving car up and down(?) like going up the hill make engine work better/worse.