Join Date: Jan 2009
Location: Surrey, BC, Canada
AWD V8 is offline
Re: fuel pump pressure
Did you actually check the pressure with a gauge, what is it?
If you are checking at the shrader valve, and it correct, for now it should be enough to get it started. After it's running and you still have problems then you would need to confirm sufficient flow, filter/pump.
Spark can be present, but like fuel delivery, it must be sufficient to do the job. A weak spark, or a good one at the wrong time will do you no good.
You need a good snapping blue spark. Less than that and you need to dig deeper. Is the spark going to the right cylinder at the right time? If the cap is carbon tracked or damp the spark goes to the wrong cylinders. If it's damp or cold where you are I'd pull the cap off and look around. Dry it out with a tissue. I've even seen plug wires so bad that it won't start when damp out. Crank it and look at the plug wires in the dark to see if they are leaking voltage.
You also need compression. Any problems with starting before this? Or did this just come out of the blue? A compression loss usually comes slowly so it would be getting harder starting over time.
If you have confirmed that you at least have fuel pressure while cranking it, put a timing light on #1 and crank it. See if it flashes when near the TDC mark.
If you have a good spark, give it a squirt of gas in the intake to see if it responds. You may have spark, fuel pressure, but the injectors may not be operating.