[rdnich]

4.6l Seville SLS No start, I have run pressure test on fuel line (56 psi) falls to about 10 psi in 10 min. Have done fuel relay bypass test to pressure up the fuel rail. Have also done the fuel relay test by turning on the ignition and checking continuity between 3 and 5 on the relay and it shows continuity all the time, swaped it out with the AC compressor relay and same result. Where can I go from here?

 

[Ranger]

How did you check the fuel pressure. Key on? Also try while cranking and see what you have. If you still have good pressure, then your problem is ignition. Pull the DTC's.

 

[john19999]

To check if ignition coil is good or not, you can use inductive timing light. It is about $40 from Advance auto parts. I used this tool when my car had ignition issue and it was very easy to identify the bad coil pack.

Thanks
John