22nd Jan 2010, 01:03

Had a similar problem with delay in throttle speed. Check your radiator cap and radiator for diesel.

9th Feb 2010, 23:57

I've got a problem with diesel in the radiator engine runs OK, but diesel water flows out the overflow. Any help would be great.

20th Feb 2010, 23:23

If this is the 3.0 litre 4JX1 diesel motor, this is what the cause of your problem can be. I had the 2000 model a while back. The 1998 to 2002 models have 2 main engine faults.

The first is the injector O-Rings, which leak oil into the cylinder, which when it gets bad, causes the engine to surge or run on when the key is turned off. This is a known fault, and the dealer will fix it free for you. Check the Dog and Lemon guide.

The second which sounds like the problem written about above. It is caused by the oil pressure sensors for the injectors. The engine uses an electric and oil pressure mechanism to open and close the injectors. There are oil pressure sensors for each injector, which indicates if the oil is up to pressure for the injectors to work. The fault is the sensor faults, and indicates the oil is not up to the correct pressure, so tells the computer to stop the engine. Or in the early phase, the accelerator doesn't work when the engine is first turned on.

Related to this is using the right oil. It should be a high grade 5-30 or 40 oil. Also the engine has 2 oil filters and 2 oil pumps. The second smaller filter and the pump is for the injectors, so if the filter is clogged or the pump faulty, the oil will not reach the correct pressure for the injectors to work.

Also, there are 2 oil pickups in the sump. There is a fault where the seal at the neck breaks, so the pumps suck air as well as oil.

Sorry, not well written, but hope this helps.

27th Feb 2010, 13:58

I recently bought a 1998 Isuzu Wizard (4JX1 diesel, 145,000km) from a large dealership. After a couple of months it became difficult to start, then nearly impossible to start. When it did start, engine did not respond to the throttle for 10 minutes plus. Dealership unable to fix and transferred investigation to diesel specialist. Apparently worn O-rings in sensors allowed air into unit resulting in low pressure being detected, nearly impossible start and no response to throttle. Apparently, in addition to O-rings, the ECU needed to be reset. Lost a week's use of vehicle. Very pleased to have paid for Protecta engine warranty, which paid for most of repair. My version of warranty required regular engine servicing, correct engine oil and evidence of replacement of cam belt/time chain. Hope it stays fixed!

27th Jul 2010, 11:01

I have a 1994 Isuzu Wizard that has done me great. Only problem has been starting, but this was fixed by a local mechanic after replacing the relay. The only problem with my five year car is that the side mirrors are loose and rattle a lot.

20th Aug 2011, 01:48


My 1998 wagon has recently suffered this exact problem, and I took it to the garage who charged me thousands to fix. They never mentioned that there was a recall.

Could you offer any suggestions to what I can do... is it likely I could argue for a refund? I'm baffled why they didn't tell me there was a recall for this problem?

Any advice would be fantastic.


21st Apr 2012, 17:56

I have a 98 Wizard in New Zealand. We have had the wiring harness replaced under the recall, but have started to run into starting issues... When it's 1st started in morning, the engine will surge from 0-800/1000 RPM, and then if I push winter mode, it will minimize the surge a bit, but not completely? However, once the engine is warm, there are no issues with idle or driving?

Please help. Nikkidickydoo@hotmail.com

9th Jun 2012, 01:57

Hi, which sensors needed the o-rings replaced?

13th Sep 2013, 00:57

Hi, I have a 1999 model with a 3.0 ltr turbo diesel 4JX1 engine, and I've been having problems like the ones you have pointed out. I am having a problem finding a compatible oil filter (smaller one) as well as a fuel filter. Do you know the part number of these filters, because I've tried using the original filters on the car as samples, but haven't had any luck. Please help :(

25th Mar 2014, 11:23

I have an Isuzu Wizard 2000 model 4jx1 turbo diesel. The problem is first it was mixing diesel with coolant in the radiator, and now it is draining coolant in the radiator, taking it into the fuel tank, causing it not to start. Please, I need your help. Email me on samy.goeast@gmail.com.

20th Jul 2014, 00:08

I have a 1998 Isuzu Wizard, and have just noticed a creamy whitish oil in the water. The car drives and runs smoothly, but I'm worried about the oily crap.

Any advice?

16th Aug 2014, 00:36

Might be too late, but the fuel filter is a RYCO Z321, oil RYCO Z426 & Z600. I use a genuine Isuzu oil filter, main one) part no. 8-97167972-0. Hope this helps others.

1st Sep 2014, 05:35

I ran out of diesel in my 98 Isuzu Wizard, put some more in and now it won't start. I was told there may be a button somewhere to push fuel through? Can anybody help?

2nd Sep 2014, 03:52

The fuel system needs to be bled, which happens when you run out of fuel in a diesel. You will probably need to get a mechanic or roadside assist to do it. This is why you never want to run a diesel to empty.

2nd Sep 2014, 07:46

I have a 4JX1, which is not responding well. Sometimes it just cuts itself out and won't start after a few minutes. Sometimes the accelerator won't respond even when I'm driving. Please help, because I have tried all the sensors, but it still behaves the same.

10th Sep 2014, 00:05

Under the car on the passenger side is the fuel filter. On front of the filter assembly is a rubber button, which when pressed will pump fuel through the engine and back to the fuel tank. It is quite hard to press, but you will hear fuel and air returning to the tank after a few presses. The engine still may not start for several start cycles of 20 seconds or more. I removed the rubber hose from the fuel return u-bend at the back passenger side of the engine, and fitted a small plastic hose into a container to be able to see when the fuel was clear of air. This enabled a quicker start after a complete rebuild of the engine.

10th Sep 2014, 00:10

You have injector sleeve O-ring failure. Sleeves will need removing and new rings fitted to stop the mixing of liquids.

27th Oct 2014, 03:53

Isuzu Wizard restart after running out of fuel.

For the life of me, unlike the BigHorn, on my Wizard I couldn't find the fuel filter or fuel primer in the usual location on the right side of the engine bay.

So the quickest, easiest way was I went old school, which was to spray fuel or some CRC Engine Start straight into the black air intake manifold while turning the engine.

Note fuel in a spray bottle will suffice, atomising the fuel is the key - but CRC Engine Start is less dangerous. Don't attempt this if you don't really have the confidence or any inkling of how engines work.


There's a long hose connected in front of the big black plastic air intake manifold.

Remove only the right end by pinching the caliper ring, spray CRC Engine Start sparingly into the manifold nozzle (not into the hose) while a mate turns the engine simultaneously.

The engine will fire-up and sputter while it works fuel from the tank, through the lines 'til it eventually reaches the engine and presto, it starts up... this takes three or four simultaneous sprays & engine turns.

This will work for most electronically fuel injected type diesels with no fuel primer buttons.

Be careful not spray fuel or any solvent all over the engine unless you're going for the Human Torch look for Halloween :)