98 Olds Silhouette Computer Problems ?

I Took My Van To The Local Dealer Ship Because It Would Crank Over But Would Not Start .
The Van Died While Driving Down The Road.the Dealer Ship Check It Out
And Told Me That It Had No Error Codes But Did Have Spark.also Said They Could Not Communicate
With The Pcm.they Told Me It Possibly Could Be Wiring Or The Computer And/or The Fuel Pump.
They Wanted $1800 To Get It Going .at This Time I Cannot Afford This.
If Anybody Could Help I Would Be Very Thankful.
Is The Pcm The Computer ?where Could I Find The Computer ?i Checked Into A New Aftermarket Computer
They Told Me They Could Flash It For Me Does This Me It Will Work With Out Returning The Van To The Dealership
To Be Programed ?

my bet is the fuel pump is gone. the pressure valve for the fuel rail is behind the powersteering pump . why they put it there is a brainbuster. the fuel filter is on driversside right below the back of the frontdoor.i rigged a line with a pressure gauge in it and turned the key on and my pressure went from 50 lbs down to 5 lbs and at five the motor would die and not crank up.i could turn the key on and off to build the fuel pressure up to 30 lbs and the motor would surge.these fuelpumps are cheap made from mexico when they came out of the factory.but cost $320.00 to put another one in.the new ones have a connector that you have to splice in on your old wires.

Thanks For Your Input .i Decided To Check The Fuel Pump Out Futher .when I Bypass The Relay The Fuel Pump Will Come On And Build Pressure.i Have Replaced The Pcm And Still Have The Same Problem And The Fuel Pump Relay Has Been Replaced Also I Noticed A Few Thing When I Was Cheking It .the Inside Lights Will Not Come On When The Doors Are Open But Will Come Manually With Switch And The Alternator Light Will Not Light Up With The Key On (possible Bulb Not Sure) .the Back Passenger Door When Closed With Swicth Will Reopen Itself Sometimes.all Fuses And Relays Have Been Checked.the Injectors Are Not Receiving Pulse From The Pcm .the Engine Firing Has Been Check And Looks Good. The Fuel System Has Been Shut Down----why?----- Thanks For All The Help And Info Thats Been Giving .

has the battery been unhooked for a couple of days or had to be charged or jumped off? if so it might just need to be re-programmed. the reason i say this is last year i did the intake gaskets in mine. i took the battery out so it would be out of the way. when i got everything back together and went crank it up the lights were all screwed up,it cranked then died ,cranked then died. ended up re-programming as is in the owners manual and it straighten up, everything went back as before. if you have the owners manual read up on it and give it a shot it can't hurt anything. if this does not cure the power side door from opening back up using the switch. try spraying w-d40 on the door sensors and working all of them back and forth.also wipe the contacts on the door post with wd-40 and see if it helps it. let me know what happens. good luck

When I Put The New Pcm On It Was Flashed Programed To My Vin# .i Did Charge The Battery Several Days Ago.i Talk To A Tech Today He Said That It Sound Like A Ground Was Missing From The Pcm And Also It Could Be Anywhere In The Car .i Have Checked All The Ground Wires I Could Find All Of Them Where Ok .if I Had A Diagram That Showed Where They Where Located At It Would Be Very Helpful Im Trying To Find Some Diagrams Now .
Thks For Any Input

my chilton manual isn't showing any grounds around the pcm.one place to check for corroded wires is in the passthru junction box. it is located underneath the driverside floorboard right under the footrest mid row seat.the fuelpump wires,fuelgauge wires and abs sensor wires go thru one of the boxes. these are bad about getting moisture in them. the bigger one more than the little abs box.if it is green inside it spray some electrical cleaner in it and see if it cleans up.

Thanks For Input I Checked The Wiring In Floor .it Checked Ok .
The Pcm Not Receiving Power On Pins 3,19,or 20 .one Wiring Diagram Shows 19 Power Ign,20 As Battery,pin 3 Battery Feed The Other Wiring Diagram Shows Pin 68 Is Power Ign Wire .i'm Doing More Research Before I Start Replacing Wires.
Thanks

The Problem Was A Broke Wire Going To Ecm!
Thanks For The Help!