2004 expy wont start.

[Want3d]

So what i have is a 04 expy and was driving fine. I came home and shut it off. Couple hours later it just cranks. I went to the internet to trouble shoot .has spark. No fuel pressure. Replaced fuel filter and fuel pump relay fuse box.no luck .continued to look.
I can hear the fuel pump for 2 second prime. Im lost please help. I need my truck back .

 

[stamp11127]

Welcome to the forum. There are plenty of threads on bypassing the fuel pump relay as a test. Bedrck47 has a post somewhere on which wires to jump and has been posted recently. Use the search function to find it quickly.
Once the jumper is installed check the pressure again - dependingvon model the range is usually 35+ KOEO.

 

[Want3d]

I already put new fuse box with new relays in. That isnt the issue. 391 dollars for fuse distribution box .came with all new fuses and relays.

That being said would there be a pressure module or something on the rail. Mine doesnt have the fpdm. (Back of truck under spare)

Thanks for the help.

 

[stamp11127]

Even though you hear the fuel pump running that doesn't mean the fuel rail is being pressurized. Bypassing the relay allows you to monitor the fuel pressure over a longer period of time.
Monitor the pressure for 10-15 seconds, if it is still 0, drop the tank and inspect the lines. One probably has disconnected or has a hole.

 

[Want3d]

Just got done with a pressure check on the fuel rail it is 40psi then drops after a few seconds. (That is one cycle of the key )
I dont see fuel dripping anywhere. I am unable to smell stuff so that route is gone. I have no idea still.
I have new plugs im gonna put on also it had a misfire on a load. Maybe it will help.
If the pcm is bad what would i check to find that out? Just guessing at this point .
Thanks again

 

[stamp11127]

Don't guess, diagnose. Take one thing at a time, leave the plugs for later.

The 40psi tells you that the filters and lines are fine. The bleeding down is your problem. That can come from leaking injector(s) or check valve in the fuel pump. The fuel system is designed to maintain pressure for a long time.
Bypass the relay and see if the engine starts. If it does your problem is fuel related, if not you continue the diagnosis.

 

[1955moose]

Listen to the teacher, he knows what he's talking about. Your losing pressure! This may be above your comfort level for diagnosis, no shame there. We've all been there! Depending on your skill level, you may have to have a shop diagnose this one. Let us know what you/they find. Moose.

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[Want3d]

Ok. So i will try to start it with the. Ether or starting fluid if it starts it is most likly my fuel pump? I had the plugs and they needed to be changed. I had a miss. Changed them today. They looked dirty not horible. Had about 50k on them gapped the new ones at .054. Calling shop sometime this week .i really miss my truck.

 

[stamp11127]

If you are going to call a shop why waste the starting fluid?

 

[Want3d]

Idk. Lol. Just want a rough idea of what it is before taking it there. Also why i changed the plugs so i dont get ***** on a tune up. Now they cant say well it needs plugs. I just dont trust mechanics around this area. And i dont live close to a city so i kind of have to cover my back side. Thanks for your help ill keep ya posted.

 

[1955moose]

I hear you on the trouble with shop issue, but a no run condition will almost never be all 8 spark plugs, unless you flooded engine. Your problems the opposite, with little or no fuel. I understand trying to isolate your problem, so the shop doesn't try to scam you. Don't you have a better business bureau that narrows down the good shops, and has some sort of recommendation.

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[stamp11127]

PITW....WE'RE PITW

 

[1955moose]

The bureau of Automotive repair should test all shops on their skill levels, and be held accountable. If a repair goes south, they should be fined, not just when a customer makes a complaint and wins a case. It would sure cut down the hack shops operating. Sorta like thinking twice parking your car in the handicap spot. $284.00 ticket makes you think twice!

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[Want3d]

so after some time in the shop it has been determined to have jumped time. I was told about 2k to fix that including labor. I'm opting for a new crate engine with 3yr unlimited mile warranty.

 

[1955moose]

OK first question, how many miles on vehicle? Second, is your vehicle in good condition and worth throwing 2k plus at? Timing chains don't jump unless either super high mileage and worn out, or a tensioner has failed. A 2004 expedition is worth about $4,000 to $5,000 in very good condition. Any time a chain/ belt gives way, on an engine, its a bit of a gamble. In the past V8 push rod engines like 5.0/5.8 engines had more clearance between valves and pistons. Personally I'd opt for the reman engine, that way your not gambling with a possible valve interference issue. Just my 2 cents!

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[Want3d]

165k on truck and it is in great shape. I live in Arkansas so there is little to no salt very little rust anywhere.

 

[Want3d]

I have a motor on the way. wanted to opt for a more modified but cant afford at the moment so ill stick with stock. still gonna be nice to drive it again.

 

[Want3d]

yall have been a great help and i thank you. now on to my sons car and daughters truck.lol

 

[stamp11127]

How was it determined that the timing was off? Did you see the how it was determined?

So what i have is a 04 expy and was driving fine. I came home and shut it off. Couple hours later it just cranks. I went to the internet to trouble shoot .has spark. No fuel pressure. Replaced fuel filter and fuel pump relay fuse box.no luck .continued to look.

1) How does it jump time with what you posted originally?

2) You would still have fuel pressure even if out of time.

Jumped time - prove it on a scope - cam to crank timing on both banks. Known good waveforms are available for that engine.

 

[Want3d]

no I didn't but it was not firing in the correct order from what the mechanic said. he said it was popping back threw the intake. also said there was little to no compression