user 797w349o

Hey guys, I know I've posted about this Rex a few times, but we just checked the fuel return line and it turns out that nothing is coming out. It has started before by starving it for air (plugging the air intake, then holding the sensor nipple piece in a small amount), although that is without the AFM plugged in. Any suggestions would be greatly appreciated.


this is a link to the other thread, with a video of it.
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/1990-rx7-wont-start-properly-965068/

Aaron Cake

iTrader: (1)

Has the engin recently been removed and reinstalled? Connecting the lines backwards will cause this.

user 797w349o

Nope, as far as I know, it's like, bone stock

Aaron Cake

iTrader: (1)

You can cause the fuel pump to run anytime the key is on IGN by jumping the yellow two prong plug at the passenger shock tower (sometimes it ends up under the airbox). That is the fuel pump test connector.

Then, trace the fuel system from the pump forward. Check flow at both sides of the filter, the primary fuel rail, etc. etc.

user 797w349o

Thanks man, we also recently installed a new fuel pump, and the filter is pretty new, do you think it's possible that either of those could be the problem? The pump is in correctly, it just seems like the wiring to the pump isn't the best, and when we try to start the car, the fuel hesitates, and then squirts out at a seemingly low pressure