Hi im new here but i have been reading alot of the post on there. I have a 94 mark VIII and well i was stupid and power washed the motor. i ran the night before and then after the wash it wont start. i put in a new fuel pressure regulator but still nothing. im not getting any fuel pressure. the pump dos turn on when the key is on. it is getting spark and i have tried the crank position sensor. Im still kind of new to these cars. its my first car and i need to get it running soon. i also have tried the cam position sensor.

How did you check for fuel pressure? The only way you could have no pressure w/ the pump running is a completely blocked fuel line, massive fuel leak, or a broken pump impeller.

If you're getting spark, then the computer is getting power and the crank/cam position sensors are operating. Have you checked to make sure that both of the coils are firing?

This is a MASSIVE thread on MarkVIII.org. We have gone through everything, he seems to have no fuel pressure.

Crank position sensor is providing spark firing

Cam position sensor is firing the injectors.

Just no fuel for it all to work. Replace filter and we can go form there! We need this thing running! :)

unity - thanks for all the help. this car is a big project for me. im working parts off when my dad buys them, i work on things for his business. Today i have to replace electric motors in a old person scooter.

How did you check for fuel pressure?
Have you checked to make sure that both of the coils are firing?


i use the valve on the fuel rail and no fuel came out. bolth coils are firing. i when threw every plug and plug wire and the coils to see if they were firing and they are.

i added abut 2 gallons of gas and still no pressure. im going to get a fuel filter right now and goin to work on the car today or tomarrow depending on the time i get home.

Well fuel IS the key it sounds like. If you replace the filter then next would be pump since you replaced the regulator already.

Food for thought... pinched fuel line? Those retards at the quicky oil change place often use the wrong lift point. Right behind the front wheels is a nice looking area - rather square and lower than the frame. THIS IS NOT THE LIFT POINT! :) If you look further toward the center of the car you will see a metal frame, that is the lift point. On the passenger side the fuel lines go right across the "I'm an idiot" lift point, and you can guess what happens if you use it as a lift point - crushed fuel lines!

My junker 95 had a bad pinch, but oddly ran fine. I am sure I was hurting the pump but really did not car since the car was a beater.

So check that area, pull back the plastic black flap/cover and inspect the lines - cant miss em!

the car hasnt been on a lift it years. ill remember that next time i go to the garage for work if i erver got to the garage. i like doing the work my self. i plain on working on cars for a living or something with a huge motor.

I would still check them, if one is pinched it coudl have strained and finally killed the fuel pump. Yes the pump is starting though, but something mechanically may have failed. Lets prey its the fuel filter! (fingers crossed)

how do you knoe the pump is running, you might be hearing the air susp comp,how about the inertia switch? used to shut off fuel supply in the case of accident (common prob, not so much on viii's but most FoMoCo cars use the same switch)

Its not the air suspension because i have the coil kit and the switch shut off. i have cheaked and recheaked the inertia switch many of times. im replacing the fuel filter right now.

ok, didnt see anything about the inertia switch till now, possibly the "sock" filter on the bottom of the pump is clogged. i agree do the fuel filter first, keep it easy as long as you can. while the filter is out i'd just turn the key on, real quick and see if it sprays gas (be careful and try to contain the fuel), that way you can tell what direction to go from there

Chicken, great idea - never though of that to test the pump. That is keeping the filter off and having someone turn the key.

nice and easy :D

i have the fuel filter 1/2 off. its out of the bottom line but stuck in the top line and its not coming out. is there a way to get it out. the clips are off.

If the clips are off, pull on the filter while you gently rotate it. Just go easy on it. I hear plastic has a tendency to break rather easily.

Well after replacing the fuel filter and fuel regulator the car still isnt starting and I need the car to get it running for the next few weeks. Im thinking fuel pump. When I put the fuel filter in it was in need of a change and I did get some fuel pressure to were the car wanted to start and it farted. Well that was it and it was back to not doing any thing besides a healthy turn over.

Well, something happend to me yesterday that caused my 93 not to start, and I feel you have the same problem. I believe your VRCM (Variable Relay Control Module) is out. Or even possibly the fuse or maxifuse that controls the VRCM is burned. The VRCM controls controls the fuel pump as well as the AC fan. A quick test you can do now is to put your key in the RUN position, pop the hood and turn on the AC. The fan in front of the radiator should be turning. If it is not turning, then there is your problem. Find the fuse that runs the VRCM, replace it and you're back in business. Now if the fan is turning, then the VRCM is running, and you have another problem.

Also, in the compartment housing all of the other Maxifuses is ignition fuses. It is possible that water got in the fuse box and shorted out some maxi fuses.

well i replaced the spark plugs today after getting my license. i hooked up the battery and it was sputering to start as if it has some fuel pressure. i get fuel presure right when i hook the battery up and none after tring to start the car but today it was realy close to starting. im not shure but im getting some eather tomarrow and see what i can do with that. im tring to get a fuel gage but its hard to get around with no car to drive and my parents working all the time.

Here's a silly question, Tri... Are you sure you didn't mis-route some of the plug wires? Put #1 wire on #5 plug, etc?

when i did the plugs i went one by one and made shure there in the right order.

do you have a performance chip installed? if you do. remove it. this happened to me once. that my chip lost all the programming when i had an overcharge to my car. it did the samething, will not start. removed the chip and the car started. let us know

no theres no chip in the car but i wish.

i cant find anything that will cause the car not to have fuel pressure. im in the dark and i need to get it running. But when tring to start it i some times smell fuel. i get out and look around the car, under it and in the engine bay, but no fuel leak or any loose fittings.

i cant find anything that will cause the car not to have fuel pressure. im in the dark and i need to get it running. But when tring to start it i some times smell fuel. i get out and look around the car, under it and in the engine bay, but no fuel leak or any loose fittings.

Fuel, Oxygen, spark. In the right quantities, at the right time. You have spark, and oxygen, but no fuel. It is easy enough to see if you have fuel at the rail. Press the schraeder valve to see if the pressure is pumped up. If not, then either the fuel pump is not working, or the pressure regulator is not right. Since you state that the car was running after you washed it, but not the next morning, I suspect that you may have shorted something out to the pump. Since it is a fuel related issue, start at the pump and work forward. Disconnect the line before the filter, put the hose in a container, and turn on the key. If you get fuel, then the pump is at least pumping.

I think we went over all that and he found nothing. New filter, has pressure but we dont know how much without a gauge reading.

I forget, did you replace the fuel pressure regulator yet?

ya i replaced the fuel regulator. im going out now to get starter fluid and maybe a pressure gauge if there not to much. i want the one that stays on the fuel rail so i dont know the cost but ill see.

Careful with the starting fluid. If your timing is off you looking at a pretty big back fire :) Scare ya into next week!

well my friends dad is coming this week to pull the codes and help me with it. sence i have insurance i can drive the car now im tring to get it running as fast as i can. well any ways i went to autozone and had them look up a fuel pump the guy was like wow your not goin to buy this i asked why and he said this is why, $319.99! i was like yup your right.

What was the fuel pressure reading? Get it yet?

Walbro 255 $99 You can go with a 190lb also, the 255 is reportably louder.

im tring to get a reading but the lack of a gauge isnt helping.Well I dont know if this would have helped but when it was running it had a ruff idle and hesitated when accelerating. im not getting any pressure off the fuel rail besides air.

What do you mean, you're not getting any fuel pressure at the rail besides air?

Are you saying there is no fuel in the fuel rails?

ya. when i push the valve down only air comes out that is compressed some what but no fuel.

hmmm... Sounds like you're picking up air between the fuel pump and the fuel rail. But if it's "compressed", then why is it not escaping through the hole where it's leaking?

Here's a silly question... Do you have fuel in the gas tank? I mean, certain tha you have fuel in there?

If you do, sounds like either you have a leak, or the fuel pump is sucking air from somewhere. But if you've ever seen the fuel pump canister, you'd understand that's damned near impossible to do, unless you're out of fuel.

Even so, I don't think the fuel pump can actually compress air too well, since it's designed to move liquids not gasses.

Start the car, get a rag, and see if you can purge that air through the schraeder valve. Even though, that air should purge by itself when the car is running, through the injectors.

Are you SURE you're working on the correct valve? Take a pic of the valve and fuel rail you're working on. Not calling you an idiot or anything like that, but I'm starting to wonder if you're not purging your AC freon.

this one

did you check for fuel like i said when you changed fhe fuel filter?

its been 6 months and the car has no fuel pressure for shure. a friend of mine has a 93 mark that had the same problem and he says it was a computer on the drivers side of the car by the upper strut mount that had gone bad and gave it no fuel pressure. he's going to coming over to take a look and put a computer in and see if it will start. im thinking thats what it is cause of the water.

My best friends father is coming down to my house this weekend and taking a look at my car so i know its goin to be running soon because he works on fords all day, every day. the fuel pump is not running so there is no fuel pressure at all.

Thats the edis module, has nothing to do with the fuel pressure. Your pump is bad, sounds like it to me.

What he said.... he replaced the relay, and I assume checked any fuses. He gets pressure at times, but not always...

New pump time! Go with a Walbro 255, $99 and it will work well. It can be noisy, so if you dont want that, go for a Walbro 190 and you will be happy.

well I finaly got the fuel pump and it runs like a champ. the new mufflers are sick and its getting some new blood tomarrow and it got new shoes.