Question about 1999 Isuzu Rodeo
Idle revs or drops no matter what the situation
Not posting engine option, makes all answers, weak. all !!!
EFI system , control idle at all times. and hot it very tight 800 RPM
at all times.
there are 2 reason. (and lots of causes. over 50)
1: idle controls are dead. test them.
2: engine AFR is way lean, misfiring (bogging) or too rich misfiring .
on our USA cars, we check (SCAN IT) to see if closed loop status
happens at idle. if it dont we fix that FIRST.
if it is , then we fix ISC/IAC>
the ISC can lose control if it sticks or there are air leaks to the intake system
the first test is always to scan it , ill assume the 60,000 mile tuneup
was already done. after all why expect a bad running engine to idle correctly?
Posted on Jun 02, 2014
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
on 98 and up 3.2 and 3.5 v6 engines the intake gaskets are plastic.....thy crack and the truck runs rough.....listen for hissing sound or a check engine light....p0171 lean.
Posted on Mar 08, 2009
Do you have a check engine light? Which engine? My 1996 Trooper with a 3.2 D.O.H.C. is awful for plugging up the E.G.R. I have cleaned it several times! Good Luck!
Posted on Mar 21, 2010
SOURCE: surging and dropping idle
It could be an o2 sensor. When you are unplugging your battery it causes it to rereset and loose its memory. If the o2 sensor is going out it can cause false readings leading the problems you stated. You can take it and get it scanned you can do what I did and go ahead and replace all my o2 sensors. I figured since one when out, the rest wouldn't be far behind.
Posted on Sep 07, 2012
Tips for a great answer:
Jan 10, 2017 | Cars & Trucks
Sep 08, 2016 | 2011 Ford Fiesta
Mar 06, 2015 | 2000 Jeep Grand Cherokee Laredo
Oct 23, 2014 | Ford Expedition Cars & Trucks
Oct 24, 2017 | 1996 Dodge Grand Caravan
Apr 19, 2013 | Cars & Trucks
Nov 19, 2009 | 1998 Honda Accord
Mar 01, 2009 | 2003 Chrysler Voyager
66 people viewed this question
Usually answered in minutes!