20 Most Recent 1986 Nissan Pickup 4WD 1986 - Page 6 Questions & Answers

It starts but when u off the truck it still runs

alternator

Possible there is air lock and the fuel pump is not delivering the needed pressure nor the fuel for the engine to rev up to the desired level.You need to remove the fuel line and allow the air lock to clear so that there is free flow to the pump. Check for dirt in fuel or water content if the tank was drained totally. A check on the filter will confirm. clean and reset.

Hello! It can be done but it requires quit a bit of work and expense...You'll need a source for spark, intake manifold, a mechanical fuel pump, or a method to reduce fuel pressure to 7 PSI...It's not just a simple bolt on...You mentioned the TPS....If this is the only fault (plus carbon build-up in the throttle body)...I will fix the throttle body for you...Best way to go...If you have a volt meter and a little experience using it I'll send a test procedure and walk you through it...Send a comment....Guru...Saailer I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

What motor is in it. Is it ke24 or Z24

black smoke is coming from exhaust possible causes--- excess fuel enters cylinders and does not burn completely. poor fuel milage is also a common complaint, when black smoke comes out tailpipe its running to rich!! This can be caused by anything from a computer malfunction to a leaking fuel injector. A possible fix would possibly be a tune up or carburetor/fuel injection work. run some good injector cleaner in it, it may fix the problem. but if not check it out further. good-day !!

One of 2 things has happened here. Either the compressor clutch is seized to the pulley the belt rides on on the compressor OR the wiring for the clutch is shorted to a power supply. If the compressor clutch is stuck (seized to the pulley-usually with rust) on then the compressor will always turn with the engine. I have seen this several times over the years as I live in central new york where there is lost of rust on cars from salt on the highways in the winter. You can unplug the wire to the compressor and if it still spins with the engine running then it is siezed to the pulley. This WILL lead to compressor failure and WILL sieze the compressor due to overheating the compressor eventually. If the compressor does not spin with it unplugged and does when the wire is reconnected and doesnt stop ever while the car is running then it is shorted to a power supply somewhere. The Parasitic power problem can be hard to trace and is an unusual occurance. The clutch is probably locked up to the pulley but try my tests and you will know for sure.
Good luck and DO NOT try to unplug or replug in the compressor while the car is running.
Scott

Its BOTH, sort of....TBI Throttle Body Injection. If you look into the carb with engine running, you will see the injector spraying fuel onto the butterfly.

It is like a breathalyzer. a safety mechanism design to anayze the alcohol concentration of the driver's breath before he/she can start the car. If the Blood Alcohol Concentration is higher tha 0.4 the engine will be prevented from running and the the driver under the influenced of an alcohol will be prevented from driving. This will save lives.

Most of the mechanism can be re-set so the anyone not undr the alcohol could drive your car.