Question about 1989 Isuzu Trooper

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1989 Isuzu Trooper Won't Start

My wife & I have replaced the fuel pump, fuel filter, All four fuel injectors, engine relay, and properly rerouted the vacuum lines. There is fuel pressure to the fuel rail. There is excellent spark. She still won't start, What else can we try?

Posted by Anonymous on

  • Anonymous Feb 18, 2009

    You are brilliant, Thank you very much, I'm on it.

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2 Answers

miracore

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Oil level!!!

Posted on Feb 16, 2009

  • miracore Feb 16, 2009

    Finally got on.. Yes, I wrote a long answer and ws unable to "copy" it so it is lost... Ok, the oil level is easially missread so triple wipe and check for clean line. If the level is too low or the sensor is broke it won't allow the fuel pump to turn on... It is a great safty mechanism but a real pain if you've gon through the pain in the Donkey to remove the gasse tank and replace fuel pump. always, find connector on right rear wheel well (square plug) two wires, red and black... Hot wire it and see if it works. BEFORE REPLACING pain in the Donkey fuel pump.

    Also check all vacume hoses, especially the three block right under the intake manifold and the large one under the intake manifold.. you can't see it without a mirror. Another pain in the Donkey!! Still doesn't work? I onoly think it might be the timing belt has jumped or broken.. another pain in the Donkey!! Replace everything while your in there!! and the ac can be moved out of the way without discharging. Compressor and air wrench (rachet type ) is essential for working on this car, along with lots of extention, extentions and odd sized box end wrenches!!! I love this car but it is a pain to work on... What were they thinking?? Like I've thought it would be so simple to have an access pannel for the fuel pump!!!!! I could go on. Also I have heard that there are two temp sending units and one is used by the computer, if it goes bad is screws things up badly and you'll flood the car out when it is hot and thinks it is cold. All the best.. Colin

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Anonymous

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Have you done a compression test or checked the timing?

Posted on Feb 19, 2009

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1 Answer

Hard starting


This problem can be hard to track down , it could be caused by several thing's ! A bad check valve in the fuel pump letting fuel drain back into the tank , not keeping fuel line pressure up , a crankshaft position sensor can also cause this as well as an ignition control module !
Checks
Action
DEFINITION: Engine cranks OK, but does not start for a long time. Does eventually run, or may start but immediately dies.
Preliminary
?€¢
Refer to Important Preliminary Checks Before Starting in Symptoms - Engine Controls .


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Inspect the powertrain control module (PCM) grounds for being clean, tight, and in the proper locations. Refer to Engine Controls Schematics .


?€¢
Search for bulletins.

Sensor/System
?€¢
Test the engine coolant temperature (ECT) sensor for being shifted in value. Connect a scan tool. Compare the engine coolant temperature against the intake air temperature (IAT) on a cold engine. The ECT and IAT sensor values should be within ?± 3?°C (5?°F) of each other. If the ECT sensor is out of range with the IAT sensor, check the resistance of the ECT sensor. Refer to Temperature Versus Resistance for resistance specifications. Replace the ECT sensor if the resistance is not within the specification. If the sensor is within the specification, repair the ECT signal circuit for high resistance.


?€¢
Inspect the mass air flow (MAF) sensor installation. A MAF sensor that is incorrectly installed may cause a hard start. Important: The embossed arrows on the MAF sensor indicate the direction of the intake air flow. The arrows must point toward the engine. Install the MAF in the proper direction. Refer to Mass Airflow Sensor/Intake Air Temperature Sensor Replacement .


?€¢
Inspect the camshaft position (CMP) sensor for proper mounting and/or a bad connection. A long crank time occurs if the PCM does not receive a CMP signal.

Fuel System
?€¢
Inspect the fuel pump relay operation. The fuel pump should turn ON for 2 seconds when you turn ON the ignition. Refer to Fuel Pump Electrical Circuit Diagnosis .


?€¢
A faulty in-tank fuel pump check valve allows the fuel in the lines to drain back to the tank after the engine stops. Refer to Fuel System Diagnosis .


?€¢
Inspect both injector fuses for being open. An open injector fuse causes four injectors and four ignition coils not to operate. Replace the fuse. Inspect the injector circuits and the ignition coil circuits for an intermittent short to ground.


?€¢
Inspect for incorrect fuel pressure. Refer to Fuel System Diagnosis .


?€¢
Inspect for a restricted fuel filter. Refer to Fuel System Diagnosis .


?€¢
Inspect for a contaminated fuel condition. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .


Ignition System
?€¢
Test both injector fuses for being open. An open injector fuse causes four ignition coils and four injectors not to operate. Replace the fuse. Inspect the ignition coil circuits and the injector circuits for an intermittent short to ground.


?€¢
Inspect for proper ignition voltage output with J 26792 Spark Tester. Refer to Electronic Ignition (EI) System Diagnosis .


?€¢
Remove the spark plugs and check for the following:


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Correct heat range


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Wet plugs


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Cracks


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Wear


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Improper gap


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Burned electrodes


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Heavy deposits

Refer to Spark Plug Inspection in Engine Electrical.
?€¢
Determine the cause of the fouling before replacing the spark plugs if the spark plugs are gas, coolant, or oil fouled. Refer to DTC P0172 or P0175 for diagnosis of the rich condition. Refer to Spark Plug Inspection in Engine Electrical for diagnosis of coolant or oil fouled spark plugs.


?€¢
Inspect for bare or shorted ignition wires.


?€¢
Inspect for loose ignition coil grounds. Refer to Electronic Ignition (EI) System Diagnosis .

Jul 14, 2015 | 2002 GMC Sierra 1500

3 Answers

Replaced fuel pump,strainer,fuel filter,battery,computer,car will only start when you pour gas down air intake.


Sorry this vehicle does not have a fuel shut off switch or inertia switch > that's ford ! If you pour fuel in the throttle body an it runs It's something with the fuel system , an if you replaced the pump an filter an regulator , It has to be electrical ! did you check voltage at the fuel pump relay ? What engine does yours have , 2.5 , 3.3 L ? There is a in line fuse for the fuel pump near the relay ! There are four relays front right of engine compartment mounted on radiator support cross member . The one for fuel pump is the one on the inside . Fuse is near there an there is a connector not connected to anything ,this is for fuel pump prime . Jump battery voltage to it a see if it runs then ! or replace relay !

Apr 25, 2015 | 1990 Buick Century

1 Answer

How do you remove fuel injectors from a 2003 Toyota rav4


ok now before you start disconnect the negative battery cable then relieve the fuel pressure by opening the gas cap, then remove the valve cover, then the throttle body, remove the two clamps then disconnect the wire harness from the intake manifold, then the four injectors connectors from the injectors,then remove the engine wire protector from the right side of the intake manifold,remove the EGR valve and the EGR valve pipe,remove the top fitting on the fuel filter and remove the fuel line from the fuel filter,move the brake booster vacuum hose from the intake manifold disconnect the fuel line from the fuel rail,remove the fuel rail bolts, then remove the fuel injectors from the fuel rail,and when replacing the injectors always put new seals because the get hard and may not seal properly

Jan 31, 2015 | 2003 Toyota RAV4

1 Answer

Where is the fuel pump on a Astra 2000 CDE


need proper tools to remove filter. ( line pump plyers ) pump is in the fuel tank. would check the relay in the engine bay fuse box first purple top relay should be 2 of them one for the pump and one for the injectors.

Apr 23, 2013 | 2000 Opel Astra

1 Answer

I'm working on a 93 olds acheiva and the fuel pump


From the fuel system troubleshooting guide - 1993 Oldsmobile Achieva

Inspect Fuel Pump Low Fuel Pressure.
Inspect Fuel Pump Relay - Faulty Fuel Pump Relay.
Inspect Fuel Injector Pressure Regulator - Faulty Fuel Injector Pressure Regulator.
Inspect Fuel Pump Strainer - Clogged or Dirty Fuel Pump Strainer.
Inspect Engine Control Computer - Incorrect Operating Information Being Delivered and Sent From The EEC.
Inspect Fuel Tank - Fuel Tank Empty.
Inspect Fuel Line - Fuel Line leaky/kinked/loose/disconnected
Inspect Fuel Fittings/banjo bolt(s) - leaky/loose fitting(s)

For your next posting, in 1993, Oldsmobile produced the Achieva with four engine types:
Available engines To find the engine type of your 93 Achieva, compare the 8th digit of your VIN code to the entries in the above table.

Nov 04, 2011 | 1993 Oldsmobile Achieva

1 Answer

Injector not working why put new injector new computer new fuel pump does it have injector relay 1987 celebrity


Check fuel pressure. Have you replaced the fuel filter on schedule? Verify that the fuel pump is getting power. Power goes through an in-line fuse, then the fuel pump relay or the oil pressure sensor. (The relay bypasses the oil pressure sensor while the engine starts, but fuel pump power goes through the sensor during normal run operation. If you lose oil pressure, the fuel pump is shut off to protect the engine.) On four-cylinder models, the fuse is in the fuse block (E PUMP 10)
The fuel injectors are connected to the ECM fuse on one side and straight to the engine computer on the other side. Check the connectors and wiring, especially at the injector.

Aug 26, 2011 | 1987 Chevrolet Celebrity

1 Answer

My 1989 isuzu trooper will not start it is not battery or alternator i replaced the fuel pump and it started 3 times then after sitting for a few minutes it wouldnt start anymore any ideas?


i had similar problems with my 1989 as well as the wife's 1990....my problem was freyed wires near gas tank as well as fuel pump relay...the wife's was relay as well.try to follow fuel pump and relay wires test along the way. hope this helps!!

Dec 30, 2010 | 1989 Isuzu Trooper

1 Answer

My 1989 isuzu trooper will not start it is not the alternator or battery and i just replaced the fuel pump what could be wrong


Slacken injector pipes and check your getting fuel.The fuel tank is a fault with the trooper, The feed pipes are at the top of the fuel tank, and corrode causing the main feed pipe to draw in air.You have to remove bottom pan under tank and then the three bolts each side of the tank to drop down,taking care not to pull on the outher pipes.im quite sure that's your problem.Any ait that can get sucked into the fuel line.That engine will not start.

Dec 30, 2010 | 1989 Isuzu Trooper

2 Answers

1991 Isuzu Trooper. Recently my truck simply wouldn't start with no previous indications of trouble. The engine turns over but there doesn't appear to be fuel making it to the engine since after pumping...


Disconnect the fuel line at the fuel filter. Turn the car on for the pump to be on. If you are getting gas pumped out, then your pump is good. If not there's most likely your problem. Then try the line at the engine. Disconnect and see if the gas is making it that far. Your should also be able to hear the pump come on if you open the gas cap and listen while someone turns the key to the on position.

Jun 04, 2010 | 1991 Isuzu Trooper

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