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Isuzu engine repair questions and answers

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  • wags04
    wags04 - 1987 Isuzu Pickup - Engine - 8/13/2014
    My Pickup will idle very low and almost stall out.
    The engine will idle at about 600-800rpm, then almost stall out at 300-500rpm, then goes back to 600-800. The timing of the fluctuation is very consistent. I just put new plugs in last night but it was doing this before I put the plugs in. It is a manual, at the low ...
     
    0 answer
  • AutoMD Member
    AutoMD Member - 1998 Isuzu Rodeo - Engine - 8/6/2014
    "i have a 98 isuzu rodeo LS which is a 3.2 Liter engine. The vin number is 4S2CM58WXW4324246. Is the engine one interfer
    just want to make sure it can be replaced
     
    0 answer
  • kenaidog
    kenaidog - 2000 Isuzu Rodeo - Engine - 6/28/2014
    I keep getting a link error on my code reader. Connection is good.
    Previous owner changed ecm so I don't know if it was programmed or not. Also just replaced fuel pump and no power when turned over. Last one did same thing. Any suggestions?
     
    • jdl
      6/9/2014 jdl
      Did you test drive the vehicle before you bought it? Please tell me, you didn't buy a vehicle that wouldn't run?

      The generic info says if you replace computer on vehicle 96 or newer, you have to have it programmed by dealership.

      As far as the datalink connector, generic obd2, pin 16 has to have voltage or the code reader won't work.
    • jdl
      6/9/2014 jdl
      Just to add, pin 16 gets voltage from horn fuse. One way to check if computer is awake, check for ref voltage at any sensor that uses a ref voltage. The ref voltage usually goes hot with key on.
      jdl
      6/27/2014 kenaidog
      The problem was the ecm. Opened it up and found a burnt spot. Checked grounds and looked for shorts. Replaced ecm and rodeo runs like it is new. Code reader works great and power to the fuel pump.
    • jdl
      6/28/2014 jdl
      Glad you got it going your way. Good job.
  • AutoMD Member
    AutoMD Member - 2001 Isuzu Trooper - Engine - 6/24/2014
    Why does my car kick when its changing into the next gear
    mileage is 130000 while i was driving this morning the car was kicking as it was going into the next gear and as i was slowing down. this is the first time this has happened.
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2001 Isuzu Trooper - Engine - 6/24/2014
    Why does my car kick when changing gears
    mileage is130000 as I was driving this morning the car kicked several times as it was changing into the next gear and as I was slowing down. This is just started to happen.
     
    0 answer
  • kenaidog
    kenaidog - 2000 Isuzu Rodeo - Engine - 6/9/2014
    Do I need to program a ecm that was installed? Is this why my fuel pump has no power?
    Getting link error on my code reader and connection is good.
     
    0 answer
  • GCabreira
    GCabreira - 2003 Isuzu Rodeo Sport - Engine - 5/28/2014
    Why does fuel pump fuse keeps cutting.
    when car gets hot and I"m driving the fuel pump fuse just cuts. changed the fuel pump relay.
     
    • CVO
      5/28/2014 CVO
      The fuel pump may fail as a result of contamination inside the fuel tank (dirt or rust), fuel starvation (running out of gas), overheating (always driving with a low fuel level), low voltage (wiring problem), or overwork (trying to overcome a restriction caused by a plugged fuel filter).
      The harder a pump works, the hotter it runs and the more amps it pulls through its power circuit.
      Check the fuel filter, if the problem still persists and the fuel pump isn't new, replace it as necessary.
      CVO
      6/1/2014 GCabreira
      Thank you I will change the fuel filter first and see what happens.
  • AutoMD Member
    AutoMD Member - 2004 Isuzu Rodeo - Engine - 5/19/2014
    Fan moter in front of radaitor does not come on when over heating [ sitting in trafic ]what makes it turn on ?
    where is sensor located?
     
    • Jimm
      5/19/2014 Jimm
      Several possibilities; faulty radiator fan switch, faulty fan temperature sensor. The coolant temperature sensor is located on the side of the radiator, or on the intake manifold near the upper radiator hose. The sensor itself is easily replaced - and costs less than $10.00 from most on-line auto parts sources; www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com, www.pelicanparts.com - to list only a few possibilities.
  • AutoMD Member
    AutoMD Member - 1992 Isuzu Pickup - Engine - 5/16/2014
    Oil is getting in my gas what should I do
    Needto know how to fix the car oil is getting in my oil
     
    • GT500Knights
      5/16/2014 GT500Knights
      Oil is getting into your gas? Or gas is getting into your oil? I couldn't exactly see how oil could get into gas. However, if gas is making its way into the oil, you may have a serious issue.

      Gasoline in the oil will destroy your engine in a relatively short period of time. If too much gasoline enters the oil, parts that make contact inside the engine such as crankshaft and piston bearings and within the valvetrain will deteriorate quickly.

      Gasoline inside the oil is usually a sign of worn piston rings, an overly rich fuel mixture, or leaking/dripping fuel injectors. In each situation, fuel will be allowed to bypass the piston rings and contaminate the oil. Gasoline is a thinning agent, and can thin out and destroy the lubricating properties of oil.

      First test is to measure your fuel pressure. Connect the fuel pressure gauge according to instructions. Pinch off fuel return line. Turn ignition to key on engine off so that the engine is not running. Observe the gauge. Fuel pressure should not drop. If it does, you have a leak.

      Second test is to perform a compression test. Remove all spark plugs. Disconnect fuel pump fuse/relay, and crank engine over until it cannot run. Using a compression gauge in each cylinder, measure compression. Crank the engine over three cycles (allow the needle to rise three times). Make sure this is done on every cylinder making sure wideopen throttle is held. Cylinders should be within 20% of each other. Perform the test again, except the second round squirt approximately 1-2tsp of engine oil into each cylinder to be tested. If the compression of any of the cylinders that previously read low rises to a normal level, piston rings are bad.
  • AutoMD Member
    AutoMD Member - 1992 Isuzu Pickup - Engine - 5/15/2014
    Why is my truck got oil in my gas
    Put a fuel pump
     
    0 answer
  • kenaidog
    kenaidog - 2000 Isuzu Rodeo - Engine - 4/29/2014
    Kwp 2000 and iso 9141
    I plugged in the reader and turn the key to on position and these are the codes that it read. What do I do next?
     
    • Jimm
      4/29/2014 Jimm
      These are not OBD (on board diagnostics) fault codes - but are the communication protocols for the OBD systems. Basically, these four (4) protocals define how the OBD communications links and system components can 'talk' or communicate via; within the same vehicle and across multiple vehicle (different makes / models / manufacturers) types - as setting the auto industry standards.

      The others (as industry standards) are listed below:

      ISO = International Standards Organization
      SAE = Society of Automotive Engineering

      •ISO 9141-2
      •ISO 14230 (KWP2000)
      •SAE J1850 PWM (J1850 pulse width modulation)
      •SAE J1850 VPW

      Today, J1850 is implemented in a variety of production vehicles for diagnostics and data sharing purposes.

      The OBD fault codes and the code reader function would be the next step to 'activate' once the code reader recognizes the communication protocol of the data link in your vehicle.
  • kenaidog
    kenaidog - 2000 Isuzu Rodeo - Engine - 4/29/2014
    Kwp 2000 and iso 9141
    What do these codes mean?
     
    • Jimm
      4/29/2014 Jimm
      These are not OBD (on board diagnostics) fault codes - but are the communication protocols for the OBD systems. Basically, these four (4) protocals define how the OBD communications links and system components can 'talk' or communicate via; within the same vehicle and across multiple vehicle (different makes / models / manufacturers) types - as setting the auto industry standards.

      The others (as industry standards) are listed below:

      ISO = International Standards Organization
      SAE = Society of Automotive Engineering

      •ISO 9141-2
      •ISO 14230 (KWP2000)
      •SAE J1850 PWM (J1850 pulse width modulation)
      •SAE J1850 VPW

      Today, J1850 is implemented in a variety of production vehicles for diagnostics and data sharing purposes.
  • kenaidog
    kenaidog - 2000 Isuzu Rodeo - Engine - 4/29/2014
    Kwp 2000 and iso 9141
    What do these codes mean?
     
    • Jimm
      4/29/2014 Jimm
      These are not OBD (on board diagnostics) fault codes - but are the communication protocols for the OBD systems. Basically, these four (4) protocals define how the OBD communications links and system components can 'talk' or communicate via; within the same vehicle and across multiple vehicle (different makes / models / manufacturers) types - as setting the auto industry standards.

      The others (as industry standards) are listed below:

      ISO = International Standards Organization
      SAE = Society of Automotive Engineering

      •ISO 9141-2
      •ISO 14230 (KWP2000)
      •SAE J1850 PWM (J1850 pulse width modulation)
      •SAE J1850 VPW

      Today, J1850 is implemented in a variety of production vehicles for diagnostics and data sharing purposes.
      Jimm
      4/29/2014 kenaidog
      Thanks from Alaska. I got the reader from amazon and they included a data disc for instructions but I don't have anything that reads it.
    • Jimm
      4/29/2014 Jimm
      Kenaidog - are there any issues / concerns then, that you requesting assistance for?
      Jimm
      4/29/2014 kenaidog
      Vehicle will not start and these are the codes the reader showed. What do I do next?
  • AutoMD Member
    AutoMD Member - 1990 Isuzu Pickup - Engine - 4/18/2014
    Ecm fuse when key is turned to on.
    ecm fuse blows when key is turned to on.
     
    • HouseCallAuto
      4/18/2014 HouseCallAuto
      It most likely means that you have a shorted ecm or a circuit wire that powers the ecm is touching a ground. If you unplug the ecm and the fuse does not blow when you turn the key on then you can be resonably sure that the ecm is junk. If you unplug the ecm and fuse still blows then the circuit wiring is at fault or the ecm relay.
      HouseCallAuto
      4/18/2014 AutoMD Member
      ok, thanks. I already unplugged ecm & it did still blow.
      thanks Rick
    • HouseCallAuto
      4/18/2014 HouseCallAuto
      What number is this fuse? I don't mean amperage. Is it fuse #3 ?
      HouseCallAuto
      4/18/2014 AutoMD Member
      no, #1 in fuse box under hood
      HouseCallAuto
      4/18/2014 HouseCallAuto
      It most likely means that you have a shorted ecm or a circuit wire that powers the ecm is touching a ground. If you unplug the ecm and the fuse does not blow when you turn the key on then you can be resonably sure that the ecm is junk. If you unplug the ecm and fuse still blows then the circuit wiring is at fault or the ecm relay.
    • HouseCallAuto
      4/18/2014 HouseCallAuto
      Another strategy to narrow it dowm... Locate the Blue / White wire going into the ecm relay and cut the wire a few inches from the relay leaving room so you can reattach later. Now turn the key on and see if the fuse still blows and if it stopped then you have narrowed the area to between the ecm connector (white wire pin #3) and up to and including the ecm relay. If it still blows the fuse then the cause is closer to the fuse box on the white / blue wire.