Datsun

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The possible reasons why your 1979 620 Datsun may backfire pass 4000 RPM's may be because because either, you need to replace the fuel filter, clean the fuel injectors, run supreme gas( due to age of the car), replace spark plugs, ignition coil may be disconnected, ignition rotor may be scarred (about a $5.00 part)and need to be replaced, replace pcv valve ,replace air filter or timing may be off. See available supplemental information regarding engine diagnosis at related link.

No, the first Z with a back seat was the 280ZX 2+2 model.

idle air control valve needs work. either clean it inside and out or replace it. could also be the maf sensor

from this site http://www.mpgomatic.com/2007/10/08/super-cheap-high-mpg-cars-1978-1981/

it shows that the Datsun PICKUP 2WD does 39/48

find your air cleaner and follow it back to the next component which is your air flow meter a little farther is your throttle chamber its right above the throttle chamber between your idle speed adjusting screw and your cold start valve

in average condition, probably about $500, even if it's in pristine like new nothing over 1000-1200. they just are that valuable, but they run great,

Vacuum advance may not be working properly. Check internet for many possibilities or problems, start with tubing and work back to the distributor. Good skills fixing your problem.

turn the distrubtor in the oposite direction the engine turns (it turns). Retard by turning it the same direction. There is a tab on the shaft with marks on the block to guage how much you are turning.

You will need to buy a converter that's combines the separate light bulb tail light assembly into a single wire for the turn and brake light.

I'm pretty sure it should be around 36 psi.

first check all of your fuses and relays. you may need a new starter or ignition switch

Since you are looking for an older model car, your only chance of finding one will be to peruse classified and used car ads. Some may have listings online, but your local newspapers and auto listings are a good place to start for models that may be nearest to where you live.

go to oreillys and buy a chilton book for your vehicle wiring diagram is in it they sell all these books and they are easy to go by

15 7/8 gallons

Usually around 25 or 26 mpg. I have a 82 280 zx and on my best weeks i would get around 26 mpg . I drive 115 miles round trip all highway miles every day and dont get much better.

18 to 24 depending on haw you drive and whether you're using the AC

DX means a face or a WWE ( World Wrestling Entertainment ) team with Shawn Micheals and Triple H

Idle mix or hi speed?

wheel may have gone out of balance, alignment possibly knocked out of whack, or front wheel bearings loose.

Does it feel more like a fuel starvation or an electrical glitch? You rterm die needs some clarification as in, you step on the gas and nothing or sitting at idle and it quits or all of a sudden I lose power and lights. To make a wild guess I would say with what you have posted change the fuel filter and then start looking at your fuel pump. If it's electrical, I would look at battery connections first. Remove, clean, tighten. There's a start for you

maybe 15 horse or so if your lucky.

The value of a 1970 Datsun pickup in good condition can vary significantly based on factors like its overall condition, mileage, and any modifications or restorations. Generally, prices can range from $5,000 to $15,000, with well-maintained or fully restored models potentially fetching higher prices. It's advisable to check recent sales, online marketplaces, and classic car auctions for more accurate pricing in your area.

There are 3 temp sensors. 1 is under the spark plugs for the head cylinder temp. Another is on the thermostat housing for water temperature. And the 3rd is just beside the water temperature sensor and it's not a sensor it is a temperature switch.