fernando13e
New member
Hi guys, its been a long time since i last logged in, i was working outside the country and went to Uganda (no internet there 
), so when i came back home my brother told me that my old 92 4runner (which i love hehehe) was repaired in the meantime when i was outside, the cylinder number 1 wasnt working and the problem was the distributor itself not sending any spark to the spark plug number 1, now the problem i have is that if i slowly accelerate her while in Park position it stutters/hesitates/misfires, i can clearly see a variation of the RPM's in the tachometer, the check light is on and i have the code 21 Heated Oxygen sensor problem.
What i tried:
Changed spark plug wires (9 months ago i changed the spark plugs so i know they are new, unless they got deteriorated with time because i didnt drove the truck, can they get bad after a long time without using them?)
Changed distributor cap
Changed fuel pump/fuel filter
Cleaned injectors (this was done by the guy in the dealership)
Checked the Air filter for dirt and was OK, checked for vacuum leaks/air leaks, the EGR Valve hose has a veeery little air leak but the rest of the hoses are ok (can this cause a misfire?)
The weird thing is that i noticed that the misfire becomes present after the engine is warmed up after 5 to 10 minutes, and well this engine was rebuilt like 9 months ago, almost a year i think, since then i didnt drove the truck because of the cylinder number 1 not firing, and then i went out of the country and well, its been sitting on the garage until now after my brother solved the problem with the cyl 1.
Another problem i have is that when im reaching 40 mph the truck doesnt shift to 4th when i last gave it a test drive, im worried because i dont want to blow up the engine as the last owner did (3 times). Any help is greatly appreciated since i dont want to dump this beauty
, i really love this truck.
Sorry for my english hehehe.
), so when i came back home my brother told me that my old 92 4runner (which i love hehehe) was repaired in the meantime when i was outside, the cylinder number 1 wasnt working and the problem was the distributor itself not sending any spark to the spark plug number 1, now the problem i have is that if i slowly accelerate her while in Park position it stutters/hesitates/misfires, i can clearly see a variation of the RPM's in the tachometer, the check light is on and i have the code 21 Heated Oxygen sensor problem.What i tried:
Changed spark plug wires (9 months ago i changed the spark plugs so i know they are new, unless they got deteriorated with time because i didnt drove the truck, can they get bad after a long time without using them?)
Changed distributor cap
Changed fuel pump/fuel filter
Cleaned injectors (this was done by the guy in the dealership)
Checked the Air filter for dirt and was OK, checked for vacuum leaks/air leaks, the EGR Valve hose has a veeery little air leak but the rest of the hoses are ok (can this cause a misfire?)
The weird thing is that i noticed that the misfire becomes present after the engine is warmed up after 5 to 10 minutes, and well this engine was rebuilt like 9 months ago, almost a year i think, since then i didnt drove the truck because of the cylinder number 1 not firing, and then i went out of the country and well, its been sitting on the garage until now after my brother solved the problem with the cyl 1.
Another problem i have is that when im reaching 40 mph the truck doesnt shift to 4th when i last gave it a test drive, im worried because i dont want to blow up the engine as the last owner did (3 times). Any help is greatly appreciated since i dont want to dump this beauty
, i really love this truck.Sorry for my english hehehe.
), well in this 92 4runner is hard, but i mean, VERY hard to check for a faulty injector (the 3VZ-E is a very puzzling engine in terms of checking stuff) the weird thing is that it starts to misfire (i think) when the engine is up an running for about 8 minutes, and the check light is always on even after i start the engine, i checked for inconsistent sparks throughout all cylinders and the sparks were fine (when i disconnect the spark plug wire, the idle speed changes from cyl 1 through 6 one at a time and the whole truck starts to shake when i do that), i notice though that the car shakes a little bit in idle with intervals of 4 to 5 seconds (with all plugs connected), then it smooths out, if i hit the gas slowly it shakes more from idle speed to 3000 rpm's and well i think if there was a problem with an injector maybe the symptoms would be similar as if there was a bad spark plug could it?
