Engine Performance problem
1986 Nissan Truck 4 cyl Two Wheel Drive Manual 134000 miles
i am somewhat mechanically inclined. This is the first nissian I have ever had and I dont know much about them except the motors are good. This one has two problems not sure if they are related. One is the idle is set way high and tried to turn the idle screw and nothing happened. The other problem is when I take off in in gear and attempt to gain great speed it starts shuddering I guess is what you would call it. It does it in every gear. When I give it more gas it goes away. Plush clutch in it goes away. When it does this a moderate ammout of black smoke comes from the exhaust pipe but quits when pedal is pressed harder. Truck is kinda cold natured. Has aftermarket elec fuel pump and regualtor mounted under hood and the regulator is set to 3.5, is this high or low. I have changed all eight plugs and they were black and I replaced them with ngk plugs gapped to.032. What is the cause of these problems and remedy. Truck idles smooth and tranny is good.
have the same problem?
Tuesday, January 12th, 2010 AT 12:06 PM