94 not starting

tri-valleyracin

tri-valleyracin

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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.
 
segxr7 said:
How did you check for fuel pressure?
Have you checked to make sure that both of the coils are firing?
Click to expand...


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.
 
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.
 
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.
 
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
 
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.
 
You need three things to make a car run..........

tri-valleyracin said:
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.
Click to expand...

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.
 
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