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D21

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Question
Driver's side door won't open
If the driver side door will not open then most of the time this is caused by a broken door latch that should be repalaced. If neither handle works then the latch is broken inside of the door or the...
Question
Doorlock and door opener broken
It sounds like the door latch needs to be removed and replaced. The door latch and locking mechanism are built into the same part and can easily be replaced. I would recommend having a technician from YourMechanic come out and...
Question
nissa d21 z24 carburated strange rattling noise
Hello. In regards to your idle speed issue, I would recommend tuning and adjusting the carburetor until the correct idle speed is achieved. As far as the rattling noise goes, firstly I would check to make sure that the engine...
Question
Truck won't start unless I remove the fuel pump relay
Hey there. This is a sign of a failing fuel pump or potentially a faulty power connection to the fuel pump. As you know, if the fuel pump fails to supply adequate fuel pressure to the motor, this will cause...
Question
Air conditioner parts exchange - Will AC parts from a 1994 fit a 1989?
Just because both have the D21 motors you will still need to verify the mountings to the compressors are the same. The connections and hoses may all be different since body style and engine compartment has changed over the years....
Question
What happens if i replace the catalytic with a thrush muffler and put a DC sports exhaust about 2 feet away from the thrush.
Removal of the catalytic converter on a car that will be operated on the street is very illegal, and can get you a huge fine from the EPA. Also, since most modern vehicles are designed to run with some system...
Question
10 amp fuse keeps blowing
Hello. If your meter fuse is blowing when you put the vehicle into drive then it is likely that your vehicle has some sort of wiring issue. If the issue occurs when you shift into drive, then it is likely...
Question
Truck makes drumming sounds at the back
Hello. This could be a differential or driveline issue. You state the noise is momentary which rules out a lot of common issues such as tire defects and wheel bearings. Chassis ears would pinpoint the source of the noise. If...
Question
Brake lines have air, bled many times
Hello. Moisture in the brake fluid is being boiled off as steam when your brake system temperature gets above 212 degrees (at sea level). The steam re-condenses as water in the system BUT air pockets can be created and remain...
Question
Manual transmission makes noises - 1994 Nissan D21
Hello. It sounds like you have a gear, bearing, bushing, or other rotating component issue caused by wear. At that mileage, really the thing to do is just simply rebuild the transmission which is not particularly difficult since it is...
Question
Truck is running rough, loses power, backfiring noise - 1994 Nissan D21
Hey there. I would check fuel pump output and condition of fuel injectors (flow rate and solenoid resistance). After that, I would evaluate the ignition system, including distributor, plug wires, timing. If you would like to have this checked for...
Question
After overhaul my Ka24 d21 doesn't rev pass 4000 rpm
Hi there. From the description you have provided, I'm not sure running a recently overhauled engine over 4,000 rpm is a good idea. There is a 500 mile break-in period recommended by most rebuilders. Change the engine oil and filter...
Question
My 89 Nissan will not crank, My starter is OK
Before you put a lot of time into this, you need to make sure the engine is not locked up. Get a wrench on the front of the crankshaft and turn the engine through at least two revolutions. It will...
Question
Sputtering/not starting when hot?
Hi there: Usually when a vehicle is sputtering and hard to start and accelerate; it's typically an indication of either a vacuum leak, air fuel ratio issues or an obstruction in the fuel flow. Believe it or not, most of...
Question
High idle problem.
This may be a sign of a vacuum leak. A vacuum leak can be one of the most frustrating and difficult problems to diagnose. High idle speed is a common sign and stalling is another. Confirmation of an engine vacuum...
Question
How do I lean down the fuel
This may be related to many different things such as faulty or leaking fuel injectors causing the cylinders to be loaded with more fuel than what they can burn efficiently. This may also be related to a faulty mass air...
Question
Will not start - 1994 Nissan D21
Hello. Considering the circumstances, it may be wise to take a few steps back to the very basics and do a few tests that may seem redundant. Starting issues are typically simple in nature or an electrical issue. Spray some...
Question
The clutch lever that the slave cylinder pushes is not pushing/springing back
It sounds like you may have to replace the clutch. Clutches can fail in a number of different ways and exhibit a multitude of symptoms. Most people are acquainted with clutches that slip from simple wear, but it sounds like...

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