Fillmore03

2003 Pathfinder LE 205,000 mi I take care of this vehicle. I do my own work. I got it with 189,000. I've driven this thing from Chicago to Virginia and back before. I had substantial amount of trust in it before a few months ago. I had a fuel pump that failed. No problem replaced it. It was good for about a week I was never driving it too hard though. It started going to failsafe mode intermittently. Wouldn't let me go above 2500 RPMs. The only codes I was getting were for evap. I've always had evap codes so I decided to replace every single vacuum hose including the lower the PCV hoses also the PCV valve all intake gaskets and spark plugs with the exception of the lower lower intake. After that I had no check engine lights. So I started troubleshooting , I reseated every single connector with dielectric grease in the engine bay. I do have the factory service manual. I've been using it I tested the throttle body actuator it was giving 22 ohms if you tapped on it it would go haywire up to back down. I bought a used one on eBay it tested at 11 ohms when I got it. I installed it. It worked fine for about a half hour before back in this Fail-Safe mode this time it was allowing me to go to 3,000 RPM. If I shut the car off and turn it back on it seems to reset and drive fine until it it goes back in a failsafe mode. I'm thinking electrical I just don't know where to go from here Battery and alternator is fairly new. I've also reseated the engine block grounds and any other grounds I could find in the engine bay as well as two grounds by the driver side kick panel, and repaired a ground strap underneath the vehicle from the exhaust heat shield to the transmission. None of this helped. But I've learned a lot

I was dealing with vibration issues for a while on highways, If I'd slow it down to 60 it would go away, come back ect. The drums in the rear were way off balance due to corrosion, chipping. Smooth sailing now.