fuel pump wont prime. no start !

[havabowladeez]

hi, i need sum help here. ive tested the power to the pump, the inertia switch, and 12 v (pin 8,12,13) sources in the ccrm connector. by the way its a 91 mtx. i turn on the ignition and the ccrm clicks. ive swapped ccrms to no avail. ive thoroughly checked my grounds.i have swapped dis modules and i do get spark. ive swapped pcms too. i have no idea what to do next. any help would be appreciated to get my baby on the road.

ps. could it be the ignition

 

[BSTDLXY]

Any updates???? Im currently having the exact same problem with a 91 mtx as well. The fuel pump will not prime, however if i manually jump it to prime, when it does start the car keeps the fuel pump running on its own. So i know everything works, it just wont prime.... Please Help

 

[gmail]

you could do the pinout of the OBD port near the PCM and listen for the fuel pump... if nothing then you probley have a bad pump.


for the other guy
as for the pump not priming itself but works after the car is running you need to replace the PCM. the computer hits the low side of the pump for i think its 5 secs then waits for a trigger coming from the crank sensor and as long as the crank sensor is reading crank movement it runs the pump.

 

[havabowladeez]

im still workin away tryin to figure it out. when i jumper the fuel pin on the connector it does run the pump. ill update with anything new happens.