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How to adjust the idle screw on a 1993 2.6L isuzu pickup?

My isuzu pickup idles too high when in park. How can I adjust it down a bit?

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  • Anonymous Mar 20, 2014

    How do i adjust idle on isuzu pickup



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  • Cars & Trucks Master
  • 2,101 Answers

It should be run be a sensor idle air control valve

Posted on Dec 02, 2012


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Posted on Jan 02, 2017

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SOURCE: 1991 isuzu pup idle problem

Before you do anything check the coolant level,not just the reservoir but the radiator(check it when the engine is cold!).

Posted on May 16, 2009

  • 2 Answers

SOURCE: My 1989 GMC Sierra Pickup

it's your torque converter it let loose you will either have to get a new tranny or get your torque converter fixed it happened to my truck im still saving up before i can fix it. im a mechanic with a certified level two mechanics and starting my level three this spring.

Posted on Jan 21, 2009

  • 76673 Answers

SOURCE: 94 Cs charade 1.3 high idle how do i fix it

if u have a high idle there are only 2 things that cause this, one is a vacuum leak at the intake manifold, the other is a defective idle speed control air bypass valve. The idle is computer controlled and not adjustable.

Posted on Apr 09, 2009

  • 3854 Answers

SOURCE: Idle seems a bit high. Need to know how to adjust and what RPM

There are a couple of things that come to mind. One is make sure the EGR Valve and intake manifold are not carboned up. I normally have to clean them every 60 to 80,000 miles. It will actually close up with Carbon and restrict air flow and make the EGR valve malfunction. 
Secondly, the diesel pump may just have a lot of wear and it is putting out too much fuel at idle. The only way this can be checked is by the dealer with a VW specific scan tool such as VAG-COM. With this tool, you can go in and look at the the pump timing and start injection quantity. 
I have the start injection quantity many times but you have to have the software and login to get the readings. Most dealers will not do this but would rather sell you a pump if it is off.
Remove the hose from the intake where it connects to the EGR valve and look at the inside with a flashlight. See how much carbon is accumulated. This may not solve this problem but will help with starting and performance issues if corrected.

Good luck and hope this helps. To adjust the Idle, it needs to be programed in to the ECM so i am thinking that it's a Carbon issues that is restricting the air flow which the ECM is compensating to keep the engine from stalling.

Posted on May 22, 2009

  • 1 Answer

SOURCE: high idle in park and nutreal

what is thye correct idle rpm in park 1999 amigo

Posted on Mar 28, 2010

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1 Answer

What would make a Isuzu amigo to suck to much air, and idle high?

You need to check the coil packs, O2 or to lower the idle by loosening nut on back of jets and adjusting screw until idle is set as low as you want it but I would suggest 5-7 MPH. Tighten nut to lock in screw. This is a mechanic's cheater adjustment that takes less then 2 minutes to do.

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I have a 1992 2.6 fuel injected pickup. the motor will increase even if I don't press the throttle at a constant rate of speed.After letting of the throttle the motor remains at a high rev. To bring...

just check and make sure the cable is not either catching on the cables outer casing, or its got a kink in it where it feeds through the firewall

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94 isuzu pickup loping idle problem

I have a 91 pickup with the 2.3 engine. The problem that you are having is likely the same problem I have - and it is caused by the Mixture Control Valve. It is a white plastic barbell shaped device in a holder on the inside fender wall. There are two vacuum hoses going to it - one small diameter and a larger one. Air enters the bottom of the valve and is drawn through the larger hose. The amount of vacuum on the small hose regulates the amount allowed through the large hose. I haven't found one at a parts store nor have I found one in a junk yard just yet. The Isuzu dealer can order one, but as the parts guy said, "Isuzu is very proud of their part". It costs about $150. If you want to check yours, there are several things you can do: first, run the vehicle and put your hand under the valve - it will **** a lot of air all the time. You can pull the valve off the truck and pry the bottom off the housing. You will probably see the same thing I did - broken pieces that used to stop the air flow through the valve. Until you get a replacement, you can try what I did: 1. Pull the small vacuum hose off and let it lay loose, or 2. Pull the small vacuum hose off and let it lay loose AND block the large hose (or the bottom of the valve). In either case, you have to adjust the fast idle screw and/or mixture screw on the side of the carburator. If you adjust either screw, write down what you did, in case you get a new valve later. The diference between 1 and 2 is that 1 will run good once it is warmed up but will want to stall until it warms; 2 runs good both when cold and warm, but will idle faster than it should. Neither of these will make the truck run like it should, but it is a 100 times better than trying to drive it with the loping.

Nov 15, 2009 | 1994 Isuzu Pickup

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How do I tighten the ac belt on my 94 isuzu pickup?

Undo nut on idle pulley and then turn the adjustment screw and re-tighten nut on idle pulley

Jul 15, 2009 | 1994 Isuzu Pickup

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check your timing.. it might be off a little bit, also you may want to check the idle screw adjustment just under the air filter assemly

Jul 06, 2009 | 1991 Pontiac Firebird

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1993 v4 2.3l isuzu pickup idles high when a/c is on

Try replacing the EGR valve!
Also make so you accelerator cable isn't kinked, if it is replace it!

Jun 11, 2009 | 1993 Isuzu Pickup

2 Answers

High idle in park and nutreal

what is thye correct idle rpm in park 1999 amigo

May 02, 2009 | 1999 Isuzu Amigo

1 Answer

1991 isuzu pup idle problem

Before you do anything check the coolant level,not just the reservoir but the radiator(check it when the engine is cold!).

Mar 20, 2009 | 1991 Isuzu Pickup

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