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Did i just buy a lemon?

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Old Nov 26, 2018 | 2:11 PM
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jqwest's Avatar
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Default Did i just buy a lemon?

Upon inspection, everything seemed ok. Noticed a ticking lifter noise and assured me its not a big deal and have been driving the van daily with his delivery company. He also advise me to replace the spark plug as it got a reading for cylinder 1 misfire. I was sold like a fool. On my way home, I notice the oil pressure gauge was not working (always read high) so I replaced the oil sensor, spark plugs, coils, fuel injector for cylinder 1. So the problem still isn't fixed and it intermittently shake on idle and acceleration. Also the new oil sensor reads very low pressure, almost to none. Is this the end for me? Does this call for a engine rebuild? Seems like all these problem are related to a bad engine. Am I missing anything? Is a minor repair/part still on the table? What else can be done to route the issue? Thanks in advance!

Last edited by jqwest; Nov 26, 2018 at 2:44 PM.
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Old Nov 26, 2018 | 2:36 PM
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Year, Model, Engine, Mileage... you never gave us any of that.
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Old Nov 26, 2018 | 2:43 PM
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Originally Posted by dberladyn
Year, Model, Engine, Mileage... you never gave us any of that.
Sorry, 2007 GMC Savana 2500 4.8 with 250k miles
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Old Nov 26, 2018 | 2:52 PM
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Is there a check engine light on? What is the code?
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Old Nov 26, 2018 | 3:13 PM
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Check engine light ready P0301.
If my cylinder is bad, can i simple just replaced the head or will i have to replace the entire engine?
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Old Nov 26, 2018 | 3:43 PM
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Short answer, yes. The repairs themselves may be minor but you're going to spend a lot of time tracking them down (or spend a lot of money replacing things until it works).
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Old Nov 26, 2018 | 5:13 PM
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What shape is the oil? I'd try changing it and maybe stepping up a weight to see if the oil pressure changes.
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Old Nov 27, 2018 | 11:17 AM
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Do a compression test on #1 to make sure you don't have a real mechanical cylinder problem.
Spray starting fluid around the intake runner for #1 to see if you have a vacuum leak.
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Old Aug 23, 2019 | 1:27 PM
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Default Pick up tube o ring

my oil pressure drop to about 10 lb while driving it was suggested to me that the o-ring between the pickup tube in the oil pump may have deteriorated I drop the pan put an o-ring in silicone the pan backup took me about an hour and total my oil pressure is now 35 lb while cruising
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