Originally Posted by koondawg
Hello, new to the forum. I have searched quite a bit on an issue im having. I recently purchased a samurai. Its a 94, Its in pretty good shape and seems to run good. I basically bought it to do a spoa and use as my hunting rig. I owed a jimny 660 when i was stationed in okinawa about 10 yrs ago and just wanted one again.
Anyway the problem im having is the sammy seems to run pretty good. At start up it idles about 2k rpms for a minute or so then it goes down a bit. I recently replaced the distributor o ring to fix my oil leak. Now I have a check engine light with a code of 51. EGR system. Also I would like to get a new PCV valve because im sure its needed. I have really no idea were to start. Do I just through parts at it or is there someway to check if EGR system and PCV valve need cleaned. Also were is the PCV valve? I think i located the egr valve. Also previous owner put a cherry bomb in the exhaust instead of muffler! will be putting muffler back. Wont be very good for hunting with a glass pack.
Also the wiring harness that comes from passenger side to driverside over the top of the timing belt cover. The wiring has a spade connector on it and isnt connected to anything. Any ideas?
Thank you for any replies. I truly appreciate it.
EGR system probably needs cleaned. Clean all the passages and the EGR valve. You can use a piece of wire, or an old broken speedo cable and lots of brake cleaner and compressed air to get the passages clean. For the EGR valve, use a small flat screwdriver and brake cleaner and compressed air to clean out the holes. Be careful and don't gouge the diaphragm shaft that is inside the EGR valve. Once it is clean, the diaphragm shaft should move back and forth easily, when you push on the diaphragm with your fingers.
The PCV valve is near the middle of the intake, next to the head. The valve sticks straight up and look like an long hex nut with a rubber hose on the end.
The wire with the spade terminal on it goes to the oil pressure switch on the left side of the engine, under the exhaust manifold.
As far a tune-up/maintenance....
new spark plugs (NGK).
new spark plug wires.
new distributor cap and rotor.
new timing belt.
check/set valve lash.
change the fuel filter (located inside the right side framerail, over the rear axle)...if you are going to do a seafoam treatment, I would change it after you run all the seafoam through the tank.
check/change engine oil and filter, tranny and tcase oil, front and rear axle oil.
put a new poly or brass tcase shifter sheet in (so you don't have a problem with the tcase getting stuck in neutral).