Fuel relay rapidly clicks
#16
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 19
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Injector pulse? Will it fire with a shot of starting fluid? You should have around one Ohm between ALL the grounds. Engine to battery Neg. Battery neg to the sensor ground circuit, (best checked from the TPS). Then those to the body. Where that braid from the back of the head meets the firewall, sometimes you need to scrape off some paint to get a good connection.
#18
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 19
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
I AM curious how you know the injectors are "firing". Again do you have a crisp, blue spark? You have #1 at 5:00? Viewed from the side, 153624 clockwise. If so, it's gotta be flooded. If you floorboard it (and keep it there), the Renix ECU will cut off injector pulse. Wit no fuel and max air it may clear out. I might come at after its been siting, then floorboard it and try that.
The MAP and it's brittle little tube are pretty crucial. You might check if a plug is wet right after cranking it.
Once a guy had a neighbor with a dog that wouldn't quit barking. He then rammed 1/2 a bag of potatoes up said neighbors tale pipe. The neighbor in final desperation finally swapped in a new engine. That one didn't run ether! Just rambling...it should at least fire.
The MAP and it's brittle little tube are pretty crucial. You might check if a plug is wet right after cranking it.
Once a guy had a neighbor with a dog that wouldn't quit barking. He then rammed 1/2 a bag of potatoes up said neighbors tale pipe. The neighbor in final desperation finally swapped in a new engine. That one didn't run ether! Just rambling...it should at least fire.
#19
Haha weird rambling. Anyways I had 784 injectors in and use a ev1-ev6 connector adaptor. I swapped back to stock injectors and it fired right up. Maybe the adaptors are to blame? Idk. But I knew they fired cause I pulled the rail and cranked it and had fuel shoot out. I think between mounted and unmounted there might have been different stress on the adaptors making them work and not work. Not sure but that's a project for a different day. Thanks dflinstone. You helped a lot and jogged my memory on the grounds. I owe ya a beer someday
#20
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 19
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Cool! Catch me if your ever in north CA. I'll drink the cheep stuff. Cruiser, who is sometimes helpful, requires the spendy, Yuppy stuff. Are you on some limited thing that does not show the whole screen? I only ask because I've done a bit of research on injectors, and mention it in my signature, which you may not see.
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