Back fires through carborater at high speed

Here's a link Samson to your firing order. Need Diagram of firing order for 1984 nissan pickup 720 Google Search Ihave a 85 Nissan 720 4x4 with the 2.4 engine,I have put a weber carb in mine,here's a video to see. 85 Nissan 720 4x4 2 4 Weber conversion If you want to join a cool Nissan site,here's a link,type in 720world.com,I am a member,

Guys he has a Z24, Not KA24, Z24 for one, Is carbed and has older lifters and valves. They need to be tuned to spec within a certain specific limit and the cams must be rotated in certain positions when doing different valves, etc... Shouldnt take very long normally and its not a hard process but if you have a tick, you really should get it checked out. Btw, the Z24 engine's idle isnt controlled by ecu at all or else the carb wouldnt need an idle adjustment screw.

you blew your head gasket, water leaking into cylinder, when you let the car sit, it cools water seeps into cylinder. you drive it around it warms up, water evaporates, the metal expands due to heat. water stops leaking into cylinder and car feels to run normal again.

Looking at the front of the engine, starting from the left piston, it's 1-3-4-2. Hope this helps.

here ya go.

You need to adjust the automatic choke. Your choke may not be opening fully. There is a fast idle cam linked to the choke to keep the throttle open more until the engine is warm. The idle mixture screw is part 37 in the picture, but get the choke adjusted right first, and you may not have to adjust the mixture screw. See adjustment procedures at link beloe.



Repair Guides Carbureted Fuel System Carburetor AutoZone com

You have the NAPS Z (nissan anti performance system haha) emissions engine. the dual plugs provide a hot spark for exhaust gas reburn and lowered tailpipe emissions. both plugs fire at the same time.
It is not really a good engine platform for high performance modification as its limited by the NAPS Z cross flow cylinder head design, its best to leave them mostly stock. I have owned several of the 720 king cab pu's and can attest to their durability, fuel economy, and reliability when properly tuned and maintained.

CHECK THE CATALITIC CONVERTER , THAT'S WHERE I WOULD START! COULD BE STOPPED UP.

The firing order on an in-line four cylinder engine is 1-3-4-2, with cylinder 1 being the closest to the radiator in a rear wheel drive, or the closest cylinder to the alternator, power steering, AC pulleys for a transverse mounted engine. Please don't forget to rank this solution.

1-3-4-2 is the firing order