Question about 1987 Nissan Pickup

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What is the idle rpm of 1987 Z24 carb engine?

I can adjust the idle. Just need to know the correct rpm. Thanks

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  • Contributor
  • 45 Answers

750 Automatic and 820 Stick!

Posted on Nov 26, 2014

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Posted on Jan 02, 2017

emissionwiz
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SOURCE: nissan ga15 engine idle adjustment locations

The idle speed is computer controled, it is not adjustable, you most likely have sludge in the throttle valve and the idle speed control air bypass valve, clean them with carb spray with the engine running.

Posted on Sep 17, 2008

  • 90 Answers

SOURCE: 1984 datsun z24 carb swap

You can yes, but I think you will need to change the inlet manifold as well, sorry but its been a while since done a datsun.

Posted on Mar 25, 2009

  • 1 Answer

SOURCE: '86 nissan trk inconsistent idle(hi,lo,lopes)z24 carbed

internal vacuum leak in carb. replace with weber carb you will be very happy

Posted on May 28, 2009

  • 13 Answers

SOURCE: high idel

You may have a bad control valve or regulator. Did you adjust the idle properly?

1. Disconnect the connector on top
2. Adjust idle to around 650-700k rpm
3. Reconnect the electrical connection

After reconnecting, the idle should jump up around 700-750k rpm.
The idle screw is fail safe setting in case the ecu cannot set the idle. The rpm's set by the idle screw are supposed to be below the ecu/stock idle.

If this doesn't work, you may have a dirty or bad Idle Air Adjuster and/or Air Regulator. For information on cleaning that, you can refer to this page http://s95014253.onlinehome.us/63104/157335.html

You can test the IAA by supplying power to the plug with the car off. Listen for any clicks or humming. That will signify that it still may be working but is possibly stuck. The Air Regulator is for high idle for warming up your car. It has a bi-metal spring inside that rotates a disc closing off an airway to bring idle to normal after a couple minutes. If it dies it will stay open and give you permanent high idle. If it gets clogged usually no high idle for warm up.
You can remove it and peer through the end. If you see a thin sliver of light, it's open. Connect 12 volts + & -, wait a few minutes and see if it's now closed. If not, it's likely dead. It can be opened and cleaned if that's the issue.

Posted on Jun 27, 2009

  • 2 Answers

SOURCE: 1987 nissan pick up (z24 engine), while driving

blown head gasket between cylinder 2 and 3 ck compression

Posted on Nov 03, 2009

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1 Answer

84 Nissan pickup: will not smooth idle when choke goes off. It's the z24 motor 2 barrel carb. I've tried adjusting by turning the idle screw with no success. I've also sprayed carb with carb cleaner.


not an easy carby to adjust

check all vacuum hoses
check dash pots hold vacuum

free write up with pictures online Z24 carby rebuild and set up

http://forums.nicoclub.com/z24-carb-rebuild-diy-1984-86-t537596.html

May 10, 2016 | Nissan Cars & Trucks

1 Answer

How do I adjust the rocker arm bolts for the valve lash on a 1985 Nissan 720 pick up Z24 engine


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.

May 27, 2012 | 1985 Nissan Pickup

1 Answer

Need to know how to properly set mixture of fuel and air on my carburetor


Would be nice to have the year and engine size to verify you actually have a carb and not injection, but, to adjust most carbs, disconnect and plug the vacuum hose to the distributor, attach a vacuum gauge to the manifold, and a tach to the coil. Lower the idle by adjusting the throttle linkage, to the lowest rpm the engine will run at.
Turn one of the small adjustment screws in the front of the carb base 'till you have the highest rpm and vacuum (usually not the same....go for best compromise) Then, do the same using the other screw.
Repeat again at the first screw and so on 'till they are balanced. Generally it's best to then back off both screws about a quarter turn after you have finished, but sometimes that isn't necessary.
Once that adjustment has been made, re-adjust the throttle screw to the correct RPM and re-connect the vacuum line to the distributor.
One note...wait a moment after each adjustment so the engine vacuum stabilizes.
Some carbs will have the adjustment screws "capped" If you find that, you will need to remove the carb and carefully drill them out without damaging the screw head under the caps.

Jan 13, 2011 | Dodge D150 Cars & Trucks

2 Answers

Idles ruff (idles at 600 rpm) if you hlod the brake and accel too 1000 rpms the problem goes away. Is there a idle adjustment.


yes there is an idel adjustment by the carbs
you need to bring up the idle to 850 - 900 rpm in gear,,,

Aug 25, 2010 | 1987 Jaguar XJ6

1 Answer

I have a 1987 Susuki Samurai, 1.3 engine. Cold start is idles at 2000 rpm up to 2200 rpm. Is this normal? Its seems a little fast. How do you adjust the cold fast idle speed? Thanks, Randy


Yeah it sounds kinda high. There is no adj except for the idle screw on the throttle, the computer does the rest, if it has one. If not, then you can adjust it some how. If carbureted, check for 2 little screws in the front, and check the choke, If throttle body, then just the idle screw, the idle should be around 1000. Hope this helps.

Jul 03, 2010 | 1987 Suzuki Samurai

2 Answers

I need to adjust a carberater and get the 4 barrel to start working


Most likely you have a Holley carb. You may have a 460 engine. If you have the carb with a big vacuum pot in front of the carb, then you have a RPM governor. The RPM governor will work against the 4 barrel.

The main mixture for the idle jets can be adjusted like any old style carb. You may have plastic caps over the idle screws but take them off. Then use a vacuum gauge on any intake fitting and proceed to read the vacuum level as you turn the mixture screws. You want the mixture to reach a maximum RPM, then evenly turn the screw in until the RPM drops slighty and then balance for smoothest idle.

After this step adjust curb idle and see if this helps when the 4 barrel kicks in. Holley has different springs for the vacuum actuated secondaries and they are color coded. If the carb is original it should be right, but if the carb is of unknown origin you can check the proper vacuum spring, main jet, power valve and so on in a good Holley book. The mechanical secondaries are also listed with clearances to hand adjust.

By adjusting the mixture screws you have set the engine to idle just below peak vacuum pressure. This means you should have more vacuum to work the secondaries.

Feb 16, 2010 | 1983 Ford F 350

1 Answer

Need adjustments for 88 model carter 2 barrel carburator. fits 4.2 jeep


To set carb adjustment, first set timing correctly, then put both a vacuum gauge and tach on the engine. adjust one idle screw to highest vacuum reading and highest tach reading, then do the other one. go back to the first and re-adjust again, then the other. I find that if you have a mechanical screw or a solenoid that holds idle speed on the linkage, turn them back so that engine is idling at the lowest possible rpm without stalling before making adjustments, then when finished, bring idle rpm up to recommended rpm using those. On an older carb, usually the idle screw covers have already been removed. If not, you need to remove them before you begin, usually best done with carb on a bench.

Oct 06, 2009 | 1988 Jeep Wrangler

3 Answers

High RPM between shifts or at idle after driving/ warm engine


Clean the choke and linkage around the air cleaner again.

You are on the right track.

I will give ALL the intake manifold bolts a 1/6 turn....just to rule out leaky intake manifold gasket.

Check for loose or leaky vacuum hose.

Since you truck is 1987. I will replace all small vacuum hoses.

Change one at at time.

====
Change the fuel filter
====
Test fuel pressure
====
Check the ohm specification on the coil.
====
If the wires are over 3 years old then replace it
Check and clean contacts
====
Make sure the wires are not cross.
====

Do a good carb. cleaning and use Chevron gas for one tank full. Do some high RPM highway ran and see does it improve.

Aug 23, 2009 | 1987 Toyota Pickup

1 Answer

Engine Idles rough


Try rebuilding your Carburator ,sounds to me your uncle is right the diaphram under the carburator,known as the power valve will cause your engine to lack power and surge as though it's looking for a idling point,and it will cause flooding, Cheaper to buy a complete rebuilders kit from an auto parts store than it is to buy knew one ! or even have it done. last time I rebuilt my ford carb I paid about $18.00 dollars for the Master rebuilder kit ! also you will need a tach and dwell meter to adjust the carb.Good Luck.

May 02, 2009 | 1987 Ford Ranger

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