jeactx

Case closed! MAF sensor was the problem. Thanks guys!

Guy at the junkyard was telling me manual and automatic MAF sensors are different. Go figure.

I know! These sensors are not easy to come by. My Pathfinder is manual, so it's even harder. I ordered one online, just in case. If that's not the issue, I can just resell it. I will check everything again. And I will test sensor. Thanks guys

Well, I checked the wiring that goes to the MAF sensor. It seems to be fine. I also cleaned the sensor using your method ORCGuide. I remember that I removed the MAF sensor and it was hanging all the time when I was working on the heads. It might gotten damaged. How can I test it using a multimeter? Thanks for your replies guys.

It is a carb truck, by the way. No injectors

Hi everyone, I recently did head gaskets and valve job to my 87 Pathfinder V6. Broken timing belt destroyed the valves so I removed heads and took them to the shop to get new ones. Everything is assembled now, but Pathfinder can't go over 3000 rpm and has a bad rough idle. Loss of power is also present. I have checked timing. I'm pretty sure I have crank and cam timing synchronized. I also checked ignition timing (distributor) and stuff. I'm getting code 12, that is air flow meter. I cleaned the MAF sensor without luck. I need serious help. Is it the MAF sensor, vacuum leaks or off timing? Thanks for your time.