help. long detailed problem.

[dj2xrated]

i understand this is a long question but i really need help.

i used the search button on this question numerous of times but still no progress.

car used to start up everytime.
the temperature is warm/hot (summer time)
fuel tank is full.

after letting the car sit for almost a week or so until i got back home to figure out what the real problem was. i tried to start it. it started.
next day. i start it. it started.

later than day!...i started and i drive it to post office to send off the gears i had in the FS thread. leaving the post office 15min later i get into the car. try to start it. no start.
i bypassed the fuel relay with a twisted up fuse i heard the fuel pumping into the line. i think its gonna start now. Still no start. so i get a ride home pic up the DD and go to the junk yard and pull 8+ relays.

i swap and swap relays until i think it will start. so i get frustrated and just hold the key into the on position where its trying to start. maybe 5 seconds. then it stumbles as if its trying to start. so i kept holding it 2 more seonds. it starts!

so i shut it off and start it again and it revs up to 2.5 and then goes to idle. WTF.. can some one tell me what the hell is going on.

[equate975]

Crank sensor

[dj2xrated]

really you think so?.. could it be any thing else. would i need to get a new one?

[DCColegrove]

Check the DME relay...tap on it while it's running and see if iit stalls or stumbles.
Or if it's not starting bypass it 30 to both 87s (need a 3 way pigtail)

Crank sensor is possible too (and almost as common as the DME relay)