98 deville wont start

i have a 98 deville ,it turns over but want start. i getting fuel to rail on motor .power to the injecters, spark to plugs..i changed coils & pcm from another 98deville and still no start. this happened like this.... i drove to the store one day came out and car would not start. dead no power no lights no anything i got a jump from AAA drove car home removed battery charged it put it back and car just wouldn t start..it turned over but not start i checked fuses changed batterys ...nothing works PLEASE HELP

Do the injec tors pulse when cranked, is the fuel pressure the proper pressure, will it start spraying carb cleaner into the intake?

Do the injec tors pulse when cranked, is the fuel pressure the proper pressure, will it start spraying carb cleaner into the intake?


i tried spraying quick start and it does nothing no atempt to start, i dont no fuel pressure, but it shoots out the end of fuel rail if i hold i valve and crank motor.. and i only know i am getting power to the injecters by checking power in the wires going to injec.... thanks

If it won't start with carb cleaner you have no or weak/no spark, if the compression and timing are ok.

If it won't start with carb cleaner you have no or weak/no spark, if the compression and timing are ok.
i don t know, i can t check that myself.... thank you...this car also has a remote starter does yhat have any thing to do with it......do northstar have a timeing chane...

Remote start operates the ign and starter, could be something there, the N'star has a chain, not normally an issue.

remote start operates the ign and starter, could be something there, the n'star has a chain, not normally an issue.
well thanks again... Iwill have to wait till weekend and try to get running again... You gave me some good info... I ll let you know if i get it running.........thanks again for your help...peace