My engine won't start up?

This sounds like a fuel pump or the crankshaft angle sensor has gone out. When you turn the key to the on position without cranking the engine over can you hear the fuel pump run in the tank for 5 seconds?

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run down this guide and report back.

the guide helped me find a bad fuel pump I got it running thank you.

we have put a second hand gear box in our isuzu trooper went to start it and it just turns over. It will start if sprayed with quick start spray but then cuts out again, any ideas

Check that you have fuel pressure, is the pump turning on with the ignition, you do have spark as it will run with the starter fluid, so i would be suspecting a fuel pump problem, be it a pump or power supply. Check out this guide

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

mark (mhpautos)

Hi thankyou for reply would you no where to look for fuel pump as it was running perfectly before.

It is in the fuel tank, just undo a fuel line at the filter place the pipe in a container and turn on the ignition, do you get fuel? the pump should run for a sec or two then shut off.

mark (mhpautos)

I drove it home the other night and then the next morning it would turn over, but didn't even "try" to start. I have spark to the plugs and I can hear the fuel pump working, but it acts like it isn't getting any fuel to the cylinders. Actually I determined that the fuel pump wasn't working so I replaced it and when the tank was down I checked at the pump and determined that I didn't have any voltage. I had already checked the fuse and relay so I thought that maybe the oil pressure switch might be cutting out the current to the fuel pump. I jumped the voltage and the pump worked, but still didn't start. I removed the jumper wire and reinserted the fuse and cranked the car to get the oil pressure up and the fuel pump works. Is there perhaps a fuel injector relay and or fuse? Maybe something to do with the emissions sensors? Was running fine before all of this. PS I haven't changed the timing belt and don't think the previous owner did either. I bought the car with 105,000 miles 2 years ago.

Hi
T belt should be replaced at60K. Does engine seem to turn over a little faster? if yes check to see if T belt is turning. Try spraying some carb cleaner into throttle body see if it fires.
Let me know
Thanks for donate

It does seem to be turning over pretty fast, but I figured it was because there was no fuel to ignite. Is it maybe a lack of compression, hence the timing belt?

I tried the starting fluid in the intake and it didn't do anything. I will check the timing belt. Can I just try to look behind the plastic housing while someone cranks the engine?

Does this vehicle have any engine start lockouts like low fluids or perhaps something to do with the factory installed alarm system? Would a bad sensor or emission issue prevent it from even trying to start?

Thanks, Randy

Pretty sure you will find T belt to be problem

Hey Bob, Ken and the crew, you were right on. I got the covers off and sure enough I should have changed that timing belt some miles ago. Several teeth are missing and the belt doesn't move at all. Neither cam shaft turned, but the crank did and so the pistons surely were moving as well.

My question now is how can I tell if there might be valve damage. I had tried to start the car several times, but of course it didn't even try to start so only the starter turned the engine over. It was running just fine the night before when I shut it off, it didn't die or anything so the RPMs were minimal what ever the starter turns over at.

Do you think I should just replace the belt and water pump and hope that the valves are okay?. I'm guessing that short of removing the heads there is no other way to to know? Maybe the clearance is such that the piston doesn't go up high enough to touch the valves anyway? Also does this vehicle have intake valves since it is fuel injected or just exhaust valves?

Thanks for you help,
Randy

Hi Engine is NOT an interference so valve damage should not have occured. Yes engine has intake and exhaust valves and water pump replacement is good to do at this time. Sending Timing marks

Will you be repairing yourself?

I have the 3.2L SOHC and the timing marks are basically diametrically opposed. This diagram looks like the DOHC. and the information I have seems to indicate that it is an interference engine.

I think my best bet at this time is to reassemble with the new timing belt and see what happens. I have replaced the water pump and am doing the work myself. I will replace the timing belt and "give it a whirl"

The belt I have has hash marks for the cams and it has a dotted hash mark that appears to be for the crankshaft, but in order to align the dots with the crank I have to reverse the belt and the writing is backwards, (right to left instead of left to right) The cams seem to line up with the marks either way.

Does it matter which way the belt is facing as long as everything is lined up correctly? Or is the belt direction oriented for some reason?

Thanks again for all your help, you've been great. I recommend this site to my friends and you can bet I will consult you before "changing unnecessary parts."

Marks for SOHC

Use pinch clip to hold belt

Adjust tensioner to this measurment

All my info says non interference

My trooper was running ok. Went in to store and came out would not start. Then it would start run (runs smooth) for a few minutes then die. I. Had the ignition module tested they said it was good. I put a crank sensor. It stared and run for an hour let sit and restarted ok. Let car sit over night car restarted. Let car sit for 3 hours car would crank and will not star. When it does start it runs smooth. The coils and module are new(6months old) replace for a miss fire. Car has ran great until now. Could it be a faulty module?

It could be the ignition module, however, have you checked for spark to the plugs when it doesn't start?

Yes I have check for spark. No spark when it is not starting.

I suspect the module is going bad.

started early morning, ran 3-4 minutes, died, now will not start, just cranks.

Hey KATSANDY,

Do below to determine if it's fuel or spark problem:

Cranks and w/n start

Here is a guide that will help you fix the problem.

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run some tests and get back to us so we can continue helping you.

Best, Ken

the engine will crank but won't start. battery is good, gets fire (new plugs), gets fuel (new fuel pump), alternator tested OK, ignition module tested OK, sprayed ether into the intake and still doesn't act like it wants to start, will just keep turning over, new timing belt. The engine is not the original. the engine transmission and transfer case is from another trooper. ran fine for a week and then bogged out and hasn't started since. i am and everyone else i've asked are simply puzzled. i've had it in 2 different shops and no one can tell me why it won't start or get it started.

Are the injectors pulsing when cranking the engine over.

na, i haven't gotten ahold of a noid light yet, i'll try and pick one up tomorrow and try that and get back

ok i'll be honest i haven't gotten a noid light, for one because i have to take off the whole intake to get to them and two i don't think it is a fuel problem because, all the plugs have fuel on them, and even shooting it with ether, it doesn't want to even try to start.

Did you ever get your trooper started??? I am having exactly the same thing going on.

My 1992 Isuzu Trooper will not start. It happened to my wife a few days ago that the Trooper would not start, then it did start after she cranked it over a few times. The next morning, however, it did not start, and it has not started. It will turn over, but it will not fire. A repair shop suggested that the timing belt may need to be replaced. Sounds expensive for such an old vehicle.

Check to see if you have spark take a plug wire off stick a plug on hold to block crank .
See if fuel is present
If you have fuel, fire & compression see should run.
Is it turning over faster than normal this is sign of belt problem.
Let me know

Thanks for the fast response!

There's a spark, and it doesn't sound like it's cranking over faster.

What about fuel? Spray carb cleaner into intake see if it fires. If it does fuel delivery is the problem.