Better late than never but I will look into this. It still starts rough.XJChad wrote:Have you put a fuel gauge on it? See what pressure is at key on. Cycle it a few times and see what it builds to. It should be 50-60 psi. Then turn the key off and watch for a drop in the pressure. You will get some drop initially, but after the initial drop, if it drops several pounds every minute or two then you either have a bad regulator, leaking injector or leaking pump.
If all of these are ok then connect a scan tool and check codes. Low or no voltage to the cam sensor will cause this same starting/running issue. It will still start and run with out the cam sensor but it will be slow starting at times.
If I were to put money on it I would bet its the cam sensor. Most common causes are either its unplugged, bad connection or a short in the wiring.
XJChad wrote:Nice! That oil pressure... mine only runs 35 to 45, but it has 180k on it.
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I dont think the 02 sensor would cause the starting issues, but its possible. I think the 02 only comes into play after the engine warms up and comp is trying to adjust the mixtures.msh227 wrote:Another interesting note... when I was installing the new sensors I noticed that the left O2 sensor's plug was resting on the exhaust and had begun to melt. Could not tell if one of the wires has been compromised but I might replace O2 sensor to be safe (luckily it is the plug on the O2 sensor and not part of the wiring harness).
Is there anyway this could be causing the poor starts I have experienced?
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Yep, I guess the question is if it is working properly. Maybe I just replace it?XJChad wrote:I dont think the 02 sensor would cause the starting issues, but its possible. I think the 02 only comes into play after the engine warms up and comp is trying to adjust the mixtures.msh227 wrote:Another interesting note... when I was installing the new sensors I noticed that the left O2 sensor's plug was resting on the exhaust and had begun to melt. Could not tell if one of the wires has been compromised but I might replace O2 sensor to be safe (luckily it is the plug on the O2 sensor and not part of the wiring harness).
Is there anyway this could be causing the poor starts I have experienced?
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I noticed in your pic where you installed the oil pressure sender that you have the cam sensor unplugged. Did you plug it back in?
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I would check fuel pressures first and make sure its not the fuel regulator, the check ball in the pump or an injector, that sensor can be pricey.msh227 wrote:Yep, I guess the question is if it is working properly. Maybe I just replace it?XJChad wrote:I dont think the 02 sensor would cause the starting issues, but its possible. I think the 02 only comes into play after the engine warms up and comp is trying to adjust the mixtures.msh227 wrote:Another interesting note... when I was installing the new sensors I noticed that the left O2 sensor's plug was resting on the exhaust and had begun to melt. Could not tell if one of the wires has been compromised but I might replace O2 sensor to be safe (luckily it is the plug on the O2 sensor and not part of the wiring harness).
Is there anyway this could be causing the poor starts I have experienced?
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I noticed in your pic where you installed the oil pressure sender that you have the cam sensor unplugged. Did you plug it back in?
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Video played fine. Those start ups seem normal, what pump are you running?msh227 wrote:https://youtu.be/HuvJ0BXFq9M
Just a small video of my 5.3L restarting. Did much better today however after sitting for 15-20 minutes the restart was very rough again.
Hope this video works.
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