99 4runner engine problem
 

what do you guys think i should do

my cars been running ty for the pass week the acceleration is really weired for the first maybe 5 min and then its normal but yeah

should i rebuild the engine and how much does that usually cost or should i replace my current engine with another for around 1500 i don tknow what to so im a student and i need to fix my car so what should i do guys and what does it mean when you rebuild does it put back the horsepower that it had when it was new?

If it runs fine after 5 minutes it would not need to be replaced you best bet is to seek a good mechanic!

Adding a better description that it is running "really weired" will not net you any help. What are the exact symptoms?

ill try to describe it right now

so when i step on the gas pedal it laggs before it takes off struggling but id ont know what the problems is so i think its the transmission maybe or engine problem what do you think should i just get a tech to look at the problem and how much would it cost to rebuild my v6 3.4 litre engine or the transmission

maf needs to be cleaned

Getting a quote for a rebuild is kind hard if you/we aren't sure what may or may not need to be rebuilt at this point. Total engine rebuild is probably not necessary since you say it runs fine after 5 min. Transmissions are expensive to rebuild (around $2000+ average) but you'd be better off getting a used one from a salvage yard IMO.

But let's not get ahead of ourselves...like BigBallsMcfalls said, it could very well be something easy like a dirty MAF sensor (which will definitely give you those symptoms). Search for how to clean your MAF and try that 1st. I recommend you also clean your throttle body, IAC, and PCV valve while your at it. If you search, you'll find write-ups on all these topics.

Transmissions tend to slip when they are dying. Watch your RPMs, if the engine revs out while it's in gear w/o moving the truck as much as should, then you probably have trans problems. If the RPMs stay low and the truck is just sluggish - probably engine and not trans.

First thing that would be more helpful is some punctuation in your posts so we can read them.

Do you have a check engine light on?

If you do, go to an Advance Auto or Autozone and have the code pulled.

After cleaning the MAF, you should also check your spark plugs and wires if they haven't been changed in a while