Question about 1993 Isuzu Pickup
Ensure that there is no misfire. Check that the spark plugs are OK, ensure that there is fuel circulation, and check the air filter adn fuel cap (try removing it for testing).
Check the MAF and AIT sensors. This two sensors detect the air flow mass and the air flow temperature, and determine the amount of air to be mixed with fuel in the injection.
Both sensors are located in the air intake and are both common cause for idleing problem.
Check IAC (idle air control) valve. This opens and closes to let extra air in the mixture when the engine is idleing.
Check the vacuum system. The vacuum system is used to recirculate engine gases. If there is a vacuum leak you get a leaner mixture, resulting in engine running rough particularly at idle, when vacuum makes a bigger difference.
Other problems like a defective EGR valve for example, may affect idle, but will also create big problems when driving.
I think I have listed all problem. If possible pul OBD1 codes using a Mercedes OBD1 scanner (go to authorized garage). Standard OBD2 scanners do not work on this car.
Posted on Sep 12, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Mar 21, 2016 | Cars & Trucks
Nov 06, 2014 | 2000 Nissan Sentra
Feb 20, 2011 | 1997 Volkswagen Eurovan
Dec 21, 2010 | 2000 Jeep Grand Cherokee
May 10, 2009 | 2001 BMW 325
Jun 17, 2008 | 1994 Toyota Pickup
38 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: