1990 buick riviera cranks but wont start

SOURCE: 1995 buick riviera sc won't start changed fuel pump ,

Have you checked for injection pulse or compression. Will it start if you spray carb cleaner in the intake?

SOURCE: pass key stays on1995 buick roadmaster car want crank

Short circuit probably not the problem. The pass key system is not being disabled making the car inoperable, thats why it will not crank. Either you are using a key that does not have the correct resistance(black chip in key) or if it is the same key you always used then the pass key sensor went bad. I believe it is in the steering column and a qualified mechanic could help you there.

SOURCE: My 1995 buick riviera won't start. no spark fire

corrosion under the coil pack between the computer plates
Heres a video:http://www.youtube.com/watch?v=t_79_btzOF8

SOURCE: 1994 buick park ave, wont crank over,

Pass key is the security system which disables the car if it is stolen. You need the remote or a key with a chip to start the car. go to a dealer, prove ownership with registration and they will be able to help you out

SOURCE: 1999 buick lesabre security light stays on car wont crank

Hello sthomasbf
This sounds like it may be a problem with the passII security sys.
First check the two fuses in the fuse block, #1A and #2E the block is
located under the left side of dash. They may be marked as vehicle anti
theft system(vats)#1A. Fuse #2E may be marked vats/air bags.If these
are good, locate the anti theft relay located above the fuse block.
There will be a yellow wire and a purple wire on each side of the relay,
you wan't to jump the yel wire(A2) to the ppl wire(C1) one of the yellow
wires will run from the relay back up the steering colum. This wire is C1
the ppl wire on the other side of the relay is A2 jump these two wires
and this will bypass the relay. If the car still won't start the problem is
most likely in the colum, either the chip in the key or the resistor in
the ign. lock. You can start the car by locating the purple wire under
the hood in the harness with the blk plastic cover, that runs accross the
firewall. In the same bundle of wires there should be a slightly thicker
red wire, with the key in the on pos. take a sharp knife and cut into
the 2 wires at the same time to make a connection. This will turn the
starter and start the car. If you need to take it to get the key and lock
checked. Hope this helps.