I have a 1982 Datsun 280ZX Turbo that has started to have this problem. It would run steady at 65 mpg, but not respond to any attempt to accelerate other than backfire. It started to exhibit a problem of slowing down from highway speeds, with any attempt to accelerate resulting in it backfiring, unless you let your foot off the accelerator and allow it to seemingly take in the excess fuel before trying to accelerate again. Diagnostics pointed to the need to clean the fuel injection system, and replace the distributor cap, rotor, wires and plugs. When I cleaned the FI system alone, it stopped the uneven fuel issue, and would maintain road speeds, but was still sluggish to respond to quick accelerations once at road speed, and was slow off the line. With the replacement of the rotor, cap, wires and plugs, plus a tune up afterwards, it has restored performance completely.
Normally you do not get carbon buildup on injectors. They can get gummed a little, or blocked, but that should not cause backfire. Check timing.
Z22 little motor, same one that 620 trucks have. Ur better of getting a datsun 1984 or 85 truck, same style truck but better bigger motor.
Unburned fuel in the pipes. Your running a little rich, or, maybe the float level is a little high in the carb.
Black smoke is caused by too much fuel going into the engine. (often seen when running under load) If the engine smokes with little load and is worse at high RPM, it could be a plugged air filter. I have seen a Cat 3208 cat backfire and smoke as a result of a plugged air filter. The backfire only occured after the engine had reached operating temperature. I believe there was not enough air availiable to burn the fuel. This resulted in a loss of power, which opened the throttle even more. As a result, the unburned fuel was probably igniting prematurely on the next compression stroke causing the engine to run very poorly and backfire. After replacing fuel filters and checking for air leaks in the fuel supply with no success, replacing the air filter solved the problem.
It looks like a nice project for up to about the third grade. After that you need to get a little more complex.
Check the timing on it along with your plugs and wires.The backfire is from gas not burning completely and ignites in the exhaust.Most likely its the timing which can be set by turning the distrib very very little at a time till prob is solved.
Can you elaborate a little? How do you know it's the transmission? Describe the vibration. Is it only at 45 mph? Does it vibrate when you let off the accelerator?
Not moving
Yes there can be too much or too little plasma within a person's blood causing complications. Iron build up or an iron deficiency is one complication that can come of this.
yes...just the face is causing a little drag
i built on and had the same problems it is your fuel to air mixture. if carburated lean it out a little bit and it should quit back firing and it should run
possible timing issue or maybe it has that little wire you have to unplug u know the brown with black strip under glovebox when u set timing called set time wire