Question about 1989 Isuzu Pickup 2WD

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1990 Isuzu pickup with 4ZD1 engine has a fuel pump with four ports. One comes from the fuel tank, one supplies the carb., and one is for fuel return. What connects to the fourth port?

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This is a dual action fuel pump, and the fourth port is for manifold vaccuum

Posted on Nov 10, 2010


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Need for a 1993 izuzu pickup thats not getting gas to carberator

what engine? there are like 7 world wide. is car USA
the word PICKUP is both generic and real trade mark. how do you mean that word, USA pickup 93? or some other pickup sold world wide, looks like pickup but has other names (vast)_
ill guess USA, 2.3-liter 4ZD1,
outside usa its a FASTER (and huge list of names)
the usa engine sure did have a CARB, last one was 1994 in usa,
and Isuzu made that car... ending carbs forever.

how do you know that? (NOT GETTING FUEL)
no method stated.
looking down air horn cranked (boom , eye browse burned)
or cracking lines looking at dribble.?
or see the High speed accelerator pump dead, in carb. horn viewed?
CARB 101 (basic basics)
one isuzu with carb has glass float bowl lid (yah scary) does yours>?
1: fuel pressure at spec, 3.5 PSI is spec, (off SM)
2: then if that's ok , the glass in front of the FLOAT bowl shows
fuel lever there is on the line, proper. ! float level.
3: if you look in there and see lots of CRUD, bingo.
4: if dry now, or low, the float valve is gummed up or stuck closed.
5: if fuel is too high it floods.
6: if all the above is ok the carb jets are clogged with junk as all do.
end (super basics carb) we can go like this for days, on carbs.
seen all fails, of all kinds, carbs. endless. they are.
ever fix quadrajets or SU carbs, you seen lots of failures.

Mar 23, 2017 | Isuzu Cars & Trucks

1 Answer

Where's the fuel filter on my '89 Isuzu pickup 2.3 eng?

3rd post and now adds 2.3L engine,
USA car?
i will go to michells diy for you., so can you if want.
4ZD1 engine GAS, and is CARB. USA laws is yours?
carb has 3.5 PSI fuel pump. (if was bad engine would be dead)
carb has inline filter. (if clogged engine be dead)
did you know carbs can run with gravity fuel feed, so that means
your filter is not bad if misfiring engine,
are you going to guess 50 times?
its Carburetor fuel system
if the engine is ok,? (lots of parts to fail there for sure)
and sparks ok (i bet not) no tune up this decade, no new spark plugs not taking them out and going, omg, wrecked or black as coal.
et cetra.
then the CARB is bad, ever fix one, ive down more than i can count.
#1 is coke stuck on or dead
#2 is float level wrong and valve to it bad. leaks or sticks. or gummed up. or floods engine,
3: clogged jets, (endless topic)
4: air clean packed solid, its part of CARB.
5: if float level drops below spec, running sure the filter can be clogged. 99% it have to be.


Mar 03, 2017 | Isuzu Cars & Trucks

1 Answer

I have 1992 isuzu pickup and the gas tank is located in the bed of the truck there's been some modifications done to it where would the fuel filter be

I guess you didnt follow the fuel line.?
what engine is there, Isuzu ran carbs last, until 1994
the fuel tank and all fuel lines match the engine.
some are gas others are diesel.
in what country, they sold them world wide and are not the same.
the line up is.
gen3 alone.
2.2 L 115 hp (85 kW) C22NE / 22LE I4
2.3 L 4ZD1 I4 (carb)
2.6 L 4ZE1 I4
2.5 L 4JA1-T
2.8 L 4JB1-T td I4
3.0 L 4JH1-T
3.1 L 4JG2-T td I4
3.1 L LG6 V6
3.2 L 6VD1 V6

on the USA car,
the book says, and I quote

The Pick-up (P'UP), Amigo and Rodeo models are equipped with the fuel filter located directly in front of the fuel tank, whereas on the Trooper/Trooper II models, the fuel filter is located along the inner side of the right frame rail, near the rear of the vehicle."

maybe yours is missing if not there....
next time post country and engine
and displacement."size" and cyl count

Dec 26, 2016 | Isuzu Cars & Trucks

1 Answer

Where is the emergency fuel shut off switch located on a 1990 Isuzu pick up was in a front end acciedent

gen 3 ,pickup.Carb or EFI fueled?

what makes you think there is one.?
what country??? be the 5 ever in 1million posts to say. (SSDD)
what engine is there , of the 9
2.2 L 115 hp (85 kW) C22NE / 22LE I4
2.3 L 4ZD1 I4
2.6 L 4ZE1 I4
2.5 L 4JA1-T
2.8 L 4JB1-T td I4
3.0 L 4JH1-T
3.1 L 4JG2-T td I4
3.1 L LG6 V6
3.2 L 6VD1 V6

we cant guess your drive line, ever.
see why,, learn what you are driving first the post this.

if you follow the fuel line from tank forward , if you will find such a device, (way ask the blind) and if its there, it is , if not its not.
all in 5min work. no books , no internet full of the blind..
that is what i do , I look first. good luck
there are some with inertial shut offs, yes. not many.

if you have one and is our 2.3L it has this. USAf6066299-bb8f-40ad-8810-c6d4723486f5.jpg

Nov 15, 2015 | Isuzu Cars & Trucks

1 Answer

Here's my vacuum diagram for my 1989 2WD Isuzu pickup 2.3 liter! Hope it helps!

nice epa tag
4ZD1 engine, with carb.
the FSM book has way more info on topic
in the fuel chapter.
and the wiring.
i think you are the first ever to make a photo here like this.
every asks but most never present here.

Sep 03, 2015 | Isuzu Cars & Trucks

2 Answers

How do you hook up the fuel lines to a mechanical fuel put carburetor? It's on my 1989 Isuzu pickup truck!

The smaller inputs are usually vacuum lines, and the larger one, like in the picture are usually the fuel in (the fuel in is usually a pronounced very large intake (much smaller than the top) similar to the one in the picture, if that's not it.. You could test this by carefully (Warning: open gas containers and/or supplying gasoline to carburetors by unorthodox methods can cause injury or *****!) supplying gas through the port, and see if the engine will fire up!

We would often use a pint jar, with a small siphon supply line into the carb, with the vacuum created by the carb, and getting the line started, gravity flow will feed enough to run the engine for a short while, are at least enough you'll know. Sometimes even without the vacuum lines connected.

I would never recommend this to anyone who didn't know what to do or how to do it. No joke! If I was standing over the carb, I could probably point right to it. The picture doesn't do it justice. I'd find a nice diagram showing where it is, if it's not immediately obvious to you. Or perhaps, someone else may come along, and help.

I hope this helps. Let me know if it did or does.

Sep 03, 2015 | Isuzu Cars & Trucks

1 Answer

Engine running rich

which country?
which engine of them many?
wiki this, see the line up for engines..????
nobody can guess this,

1.6 L G161Z I4 (gasoline)
1.6 L 4ZA1 I4 (gasoline)
1.8 L G180Z I4 (gasoline)
1.8 L 4ZB1 I4 (gasoline)
2.0 L G200Z I4 (gasoline)
2.3 L 4ZD1 I4 (gasoline)
2.0 L C190 I4 (diesel)
2.2 L C223 I4 (diesel)

Aug 09, 2014 | 1990 Isuzu Pickup

1 Answer

What is the cylinder head bolts torque specs for the 1992 pick up with 2.3 engine (4ZD1)

ISUZU 2.3 137 4ZD1 86-95 43 FT/LBS 72 FT/LBS 58, 72 FT/LBS
ISUZU 2.3 137 4ZD1 85-87 43 FT/LBS 72 FT/LBS 58, 72 FT/LBS

Dec 25, 2010 | 1994 Isuzu Pickup

1 Answer

1983 toyota pickup 4x4 22re engine

Clogged fuel line... maybe fuel filter clogged. Air compressor can clear line. Blow out the line coming in to the carb from the tank.

Aug 03, 2008 | 1983 Toyota Pickup

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