Hi, i got 4runner 1990 i just kinda wondering if this is right.. i just got this for only 2 months. i just noticed that this is to much in gas.. i can only run the full tank for only 278 km ,, for 50 litters.. is that normal? if not please tell me what to do.. im planning to replace my oxygen sensor.. is it gonna help me to save some gas? thanks..
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Knocking noise in the air intake or do you mean a lifter noise,because you let it sit the lifter are not charged up or solidified,so you dont get adequate compression when you turn it over.if you have fuel and spark thats fine what about compression,noise from the air intake make me wonder if the timing belt is intacted.
make sure wires are clean and tight and battery is fully charged and posts are clean and tight,check starter by bumping it(turning key on and touching a RUBBER handled screwdriver across pos and neg bolts on back of starter)but be CAREFUL this will cause sparks and damage the screwdriver if starter does not turn its not getting juice,or just bad or not fitting right.
Usually reverse does not have synchroniser , so it's normal if the first gear is going in ok.
If you have problem to shift into first gear , then it might be a problem with clutch or clutch hydraulics.
Check the linkage and make sure you havent diconected anything. If the engine revs and kinda crawls real slow it might be the clutch. If it revs and desnt move and all your linkage is good it could be your tranny.