98 GMC Jimmy 4.3l 4x4

I have been having issues lately with my car.  It gradually would take longer and longer to fire while cranking.  At first it was like 5 seconds but then it got worse until it would take about 15 seconds on 2nd or 3rd try.  Now it will just turn over and not start at all.  I had replaced the fuel pump appx. 50k ago. Plugs about 40k ago.  I know I am getting fuel pressure at the rail, and i can add fuel through the throttle body and it still wire not fire.  I have replaced the rotor cap and button as well as wires.  I know that I am getting spark as well.  The car has appx. 200k on it at this point.  The only other thing I can think of is that either I have lost compression or something with the timing is off.  If anyone has had a similiar issue or thinks they may know what the issue is any held will be greatly appreciated.  

Thanks
Ace  

how old is the fuel filter...????  a clogged fuel filter will increase the time it takes for the fuel pressure on the injector side of the filter to come up to nozzle discharge pressures...

take the filter off and blow through it ...  put a new one one anyway...  it could be a single tank of gas that filled it with crud..

i would also like you to get in there.. remove the ignition coil... look it over carefully... see if there are any external signs of high voltage leakage..  a coil output tester is under 10 bucks.. at most parts stores... it is an adjustable gap... with a ground clip on the screw head...  a good coil needs to be able to jump a 50K gap with a bright blue spark...  3/4 inch.. if you feel like trying it with a screwdriver... bright blue.. snappy...  not orange and whimppee....  i will gladly start your motor tuesday.. if you turn the the key today... sort of problems...

i have fixed a lot of mis firing and hard to start problems with a fresh 50 buck coil...