Question about 1989 Isuzu Pickup 2WD

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Recently purchased 1989 isuzu pickup,check engine light on & o2 light on,when driving the engine light goes off, but everytime you let off the throttle the engine light comes on, during acelleration the engine runs like the choke is on until it gete to high rpms & then runs good,just put in new spark plugs & new o2 sensor, did notice that alot of vacuum lines are plugged, any help would be grateful & truck has 110,000 miles & does not smoke at all

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

csmock132
  • 4669 Answers

SOURCE: 1989 GMC 2500 5.7L - engine surges and stalls at idle. Loses power at cruising speed.

Wow you have replaced a lot of stuff. Lets go back to the Fuel pump. When you replaced it did you replace the hose between the pump and the sending unit. These are common for splitting. Have you hooked up a fuel pressure gauge to check what pressure you have? It should be real close to 13 psi and should raise to at least 18 or 19 when you pinch off the return line.

Posted on Jun 02, 2009

  • 99 Answers

SOURCE: Isuzu Hombre pickup, 2.2L Vortec, Won't Start.

You need four things for an engine to run. 1. fuel 2. spark 3. compression 4. timing (spark at the right time. By your post it seems you have fuel and spark and you probably have compression unless you blew a head gasket. That leaves the timing. Check the timing and/or the timing belt or chain whichever you have.

Posted on Aug 07, 2009

  • 36 Answers

SOURCE: 2001 Isuzu Rodeo 4WD. CHeck Engine light on and

After market spark plugs could be the problem.
Reinstall the old plugs and see if that fixes it.
This vehicle has an ion sensing ignition system and is real sensitive to the proper spark plugs. I would get the proper plugs from the dealer if the old ones work.
The codes P1311 and P1312 are ion sensing codes.

Posted on Oct 19, 2009

  • 97 Answers

SOURCE: 1996 isuzu rodeo keeps reading

A misfire alarm typically means the coil pack mounted above the sparkplug indicated in the misfire had gone defective.

To test it, swap the coil pack with another cylinder, and see if the misfire goes from #2 to the cylinder you put it on.

If the misfire continues to be on #2, then consider changing the sparkplugs.

I hope this helps.

Posted on May 15, 2011

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1 Answer

Isuzu Pickup 1989 multifunction turn switch headlights wont stay on


both high and low beams fail?????
if highs fail, does pressing the flash lever wake up HIGHS?
all 4 elements fail, hi and low? left and right?
a Blast from the Past,
not many 89 cars on the road today.
nor any working 100% , not ever. that old. (unless i own it)

head lights on this car are cave man simple.
super simple... so simple any tech can fix them.
a fuse , light and a switch, and Zero computers or NASA engineers needed.
i do blast from past here., my bag.
first i tell you now,, im answering for USA only
as Canada cars have DRL lamps, we dont.

this is 1987 , no 89 in my set.

there is the path that is broken.
try a fresh fuse first. they can have internal cracks(micro)
50cent fix if lucky.
check for burned pins


25895719-gulfqn0rsmd1zwbqhnkn4a4e-2-0.jpg

Oct 06, 2015 | 1989 Isuzu Pickup 2WD

1 Answer

How do I reset a 1989 isuzu truck?


reset what? (lots of parts/systems on a car... name one?)
post symptoms first.
engine will not crank
starts but stalls
engine misfires or bogs
engine stalls.
reset radio
reset inertial fuel switch.
reset DTC SCAN errors errors
Rest check engine light?
like that....

Sep 12, 2015 | 1989 Isuzu Pickup 2WD

1 Answer

The idle on my 98 Isuzu Rodeo shoots up AFTER driving for awhile, then goes back to normal after killing the engine for awhile. Need some troubleshooting suggestions. Thanks


You more than likely have a idler sensor bad. It could also be a O2 sensor. Is your check engine light on ? If so, you can take it to Auto Zone and they will check it for you for free.

Apr 20, 2013 | 1998 Isuzu Rodeo

1 Answer

2002 1.8t "OIL PRESS. STOP MOTOR!" & Engine light always on.


The oil pickup tube has a gauze. Have you checked that for blockage?

Aug 15, 2017 | 2002 Volkswagen Passat

1 Answer

My check engine comes on when in driving if i take my foot off the gas pedial and that apply acceleration again the light gose off. when the light goes on i lose power


I also have experienced this problem with my Isuzu D-Max pickup. Did the problem occur when you were having a long drive? Coz it happened to me when i was already driving for 1 hour at a regular fast speed. After that, the problem stilled continued, especially when i reach 100km per hour.

What I did to fix the problem was i had the pickup's alarms calibrated by an Isuzu authentic service center. Coz only Isuzu service centers can calibrate the alarms and i think they're the only ones who can diagnose the car's problem if the check engine alarm turns on.

After that, we found out that there was no problem with the engine. Just the "check engine" alarm's calibration.

Mar 17, 2011 | 1993 Isuzu Pickup

2 Answers

Hi, I have an 1989 Isuzu longbox with an automatic transmission. The truck has been running perfectly. Driving down the highway it lost sputter as if running out of gas (I was very low). I coasted into a...


The gas in the tank actually provides cooling to your fuel pump.My best guess is that you ran low on fuel and the pump (which could have been marginal) has had it due to overheating.You will have to get the fuel system pressure checked to be sure or remove the main fuel line and see if fuel comes out.Have a bucket ready just in case.Good luck

Oct 25, 2010 | 1989 Isuzu Pickup 2WD

1 Answer

Horrable screaching coming from trans


This may sound stupid, but I've had what sounds like the same problem until yesterday! Take the vacum line off the EGR valve and see if it stops!?! I thought it was the transmission too, so did the mechanic and the transmission shop, but he told me to drive it till it got worse, yesterday it sounded like the AC comp. It was the EGR valve, took it off and pluged the hose, haven't heard either noise. It's worth a try!

Jun 09, 2009 | 1989 Isuzu Pickup 2WD

2 Answers

Check Engine light goes on and off


run a trouble code test to see what part is causing the check engine light to flash. I would lay my money on an O2 sensor.

Mar 10, 2009 | 1990 Isuzu Trooper

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