Hello all i need some help, i am a new owner of a 1986 4runner, 5speed with 256K on the chassis, and 15K on a rebuilt engine. I bought the truck about 1 month ago and everything was fine. After i added seafoam to the fuel tank and on the intake manifold the car was fine. I recently changed the OEM airbox for a K&N filter and now I have a very hard time to start the runner when is cold.
When i crank the engine it turns fine but it feels like it is not getting enough air, unless if i rev the engine and then i hear a big "pop" sound it sounds like it is comming from the AFM, it sound like not enough airr is getting to the engine.
I check for any codes yesterday and i got codes 4 and 11. I replaced the collant sensor this morning and retested again, i only get code 11. I know that this has to do with the TPS or maybe the ECU.

my question is could the TPS cause this problem, when the engine is cold and sometimes when it is hot as well?? Should i check the TPS following www.4crawler.com page.

PLease help me out, this is driving me nutts, since it is not starting properly, i have also nothiced really bad MPG??

Thanks in advance.

 

I took some pictures of the engine and i see one plug that is not conencted also the tail pipe released alot of water/ liquid. Please see the pictures.





and the tail pipe. there is a brand new O2 sensor, cat and muffler.