fuel injector pulse signal
got a '91 tuned port.had sat for 7 years.replaced the fuel pump and filter,ign.module and ecm.cranks and dies.fuel pressure and spark are fine but injector pulse fades away.checked all ecm power and grounds.sent to dealer,they are lost and just running up my bill.injector maintains 12vdc at all times key is on.tried a third ecm for gp but to no avail.what could cause the injector pulse to fade away?both sets do the same.will stay running when sprayed in the throttle body.im confused and have been doing this most my life!thanks for any input.
Pressure to high injector won't open
I have a 97 supercharged grand prix-- harmonic balancer was damaged which caused me no injector pulse. The back of the balancer blades got bent when I lost my serpentine belt. Changed everything-- crank sensor, can sensor ,modual , e.c.m , fuel pressure sensor , injectors. , injector Harness , fuel rail , ect! Still nothing!! If the fins on the back of balancer arnt within range of the crank sensor , you won't have injector pulse. Just saying!! Ya never know!
Sounds like you got a bad part!! Just cause you bought everything new you replaced - doesn't mean it works!!!
