'02 Mazda Tribute Cranks but no start, no fuel pressure or fuel pump will operate

benloveland45_179429
Sun, 20 Feb 2022 03:11:05 +0000
General Discussion

Was idling to warm it up and after 5 min it stalled…this was 8 days ago and I’ve been at it everyday going through every possible scenario. I can start it ONLY by using starter fluid and it dies immediately after that has been used up. Inertia isn’t tripped. Relay and fuse to the pump are good and fuel filter is new as i went ahead and replaced items one at a time to help eliminate but to no avail. (Crank and camshaft sensors, idle control valve) The only weird thing I’ve noticed is a low buzzing sound when the key is in the “on” position that is intensified only when I slightly jiggle the throttle with my left hand as I listen with a stethoscope in my right hand and it is the loudest at the transmission but can be heard all over…UNTIL…I unplug the EEC Relay. Then the buzz is completely gone. I have replaced 3 relays now and they just keep getting fried after I leave the key on and listen around to better isolate the buzzing sound or try and start it after trying something else only to still be no further along than what I have explained here. Please help if you can… I cant afford to do anything other than get what I need at the junkyard and make it work by doing it myself. I’ve been sorely disappointed in the past several times at multiple Mechanic shops and only end up poorer and sometimes with even more issues!!!
I grabbed another ECM from the junkyard thats an exact match but dont have any way to update it to my original keys so i cant even test it yet. Is this just a bad ground inside somewhere I’m not able to see? My original ECM looks very good on the inside and the motherboard, soldering, chips, pretty much everything looks like it should and doesnt indicate its bad by looks or smell. Ive notived the transmission would almost ALWAYS hard shift in to 4th and only the 4th gear. It has stalled while driving a handful of times over the last 2 years. All maintenance is kept up on it and is a Very well taken care of vehicle. Slow drivers mostly and rarely need to get in to the pedal. Any insight would greatly be appreciated

30 posts - 7 participants