Suburban won't start!
Thread Starter
CF Beginner
Joined: Sep 2017
Posts: 11
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Suburban won't start!
I have a 03 suburban z71 5.3l. I can not get this thing to run. I've changed injectors, spark plugs, wires, fuel pump. So this is what it is doing. I turn the key and and fires but will not run. Just keep turning over and firing but dies instantly. My computer said #7 and #8 cylinder are dead. The last thing I can do is coils. But I would like to know if any of you have had similar problems. Or could think of anything else I could check? Any feedback is great! First post on THIS fourm!
CF Junior Member
Joined: Sep 2017
Posts: 39
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From: Oregon
You could try juicing small amounts of starting fluid in the throttle body to see if it's a fuel problem. I'm just a farm kid and like working on the 78 Power Wagon a lot more than my 07 'burb.
I hit the forums and found guys out there have had similar issues with PassLock system malfuntioning: "To relearn, turn the ignition key to the on position for 3 10 minute cycles, turning the key to the off position for 5 seconds after each 10 minute learn. It will start but you may have this problem again & will get tired of having this happen & will need a new passlock sensor eventually."
Just trying out cheap and easy ideas here..
I hit the forums and found guys out there have had similar issues with PassLock system malfuntioning: "To relearn, turn the ignition key to the on position for 3 10 minute cycles, turning the key to the off position for 5 seconds after each 10 minute learn. It will start but you may have this problem again & will get tired of having this happen & will need a new passlock sensor eventually."
Just trying out cheap and easy ideas here..
CF Junior Member
Joined: Sep 2017
Posts: 39
Likes: 0
From: Oregon
If it runs on ether I'm inclined to think fuel issue.. I'm betting you changed the fuel filter. Probably got power to the fuel pump. There's a pressure regulator in there somewhere.. You got a fuel pressure gauge on hand?
