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  #1  
Old November 28th, 2007, 06:42 PM
Quicksilver Quicksilver is offline
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55mph hitching

Hey all. Got a 2001 V8 LS. My dad and I swapped vehicles the past few days so I could use his truck for a move. When I got it back tonight, I noticed while on the highway that when I got to about 55mph (probably closer to 56-57), it would start hitching a little, like it was missing or something. Drop below, smooth sailing, get above, equally good.

Nothing else seemed unusual, and upon questioning, my dad mentioned he felt it a little too. In park, it revs smoothly up to the 3000RPM mark, and the computer check doesn't point out anything. I don't have a code checker, so I don't know about that. Places like Auto Zone can run codes on a car for free can't they?
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  #2  
Old November 28th, 2007, 07:49 PM
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yeah, my guess is take it to autozone to get it looked at.
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  #3  
Old November 29th, 2007, 08:48 AM
Quicksilver Quicksilver is offline
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I'll probably do that after work today. I'm thinking maybe an airflow sensor or ignition pack acting up. Does that sound reasonable?
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Old November 30th, 2007, 08:47 AM
Quicksilver Quicksilver is offline
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Well, the car isn't throwing any codes at all, which I guess is a good thing. I'm gonna try throwing a bottle of Heet through it. Might be a little condensation hitting the gas with the weather getting cold. It also occurred to me that my father might not have been putting premium in it, and I've noticed it sometimes doesn't like anything much below 87 octane. If the Heet and new gas don't help, maybe I've just got a plug going bad. Thoughts?
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  #5  
Old November 30th, 2007, 12:52 PM
AbbysGuy1984 AbbysGuy1984 is offline
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It could be that he put lower octane in it. If you put below 91 in it it'll ping/knock and I'm sure cause other issues as well. Other thing to check would still be your coils on the spark plugs. They may be shorting with out throwing a check engine light or code that the generic code reader AutoZone has would read.
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  #6  
Old November 30th, 2007, 01:10 PM
Quicksilver Quicksilver is offline
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Yeah, I'll check those out. Do they just pull off, or is there labor involved to get them off and check?
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  #7  
Old December 4th, 2007, 09:22 PM
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based on your other post - this could also be the start of the oil-in-spark plug wells causing the COPs to short. This usually shows as a minor mis-fire and then gets worse over time.
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  #8  
Old December 5th, 2007, 07:32 PM
Quicksilver Quicksilver is offline
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I will be checking them out shortly. I did briefly have it on the highway the other day. It only happened once, and at a slightly lower speed than before, but that was all. I filled up with 91 today and tossed in some Heet just to try that out. What's the process to pull off the COPs? Do they just pop off, or do they like being difficult?
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  #9  
Old December 5th, 2007, 07:33 PM
Quicksilver Quicksilver is offline
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nm, I saw your other answer just now. This might have to wait until spring unfortunately. Cold time of year coming here...dang it.
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