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4.8 seems off a bit

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Old Sep 15, 2022 | 8:51 PM
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tsoleno's Avatar
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Default 4.8 seems off a bit

2008 . It's a loaded 3/4 ton and seems normal except for 2 things. MPG on the trip computer dropped by 1 MPG. Idle has been a bit rougher lately. Are these prone to things like intake leaks? No SES light anyways. I haven't had codes checked.
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Old Sep 17, 2022 | 9:13 AM
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Originally Posted by tsoleno
2008 . It's a loaded 3/4 ton and seems normal except for 2 things. MPG on the trip computer dropped by 1 MPG. Idle has been a bit rougher lately. Are these prone to things like intake leaks? No SES light anyways. I haven't had codes checked.
Could be vacuum leak or fouled injector. I'd run some Chevron Techron or Lucas fuel injector cleaner down the gas tank.
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