Slight shake after extensive tune up | Ford Explorer Forums - Serious Explorations

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Slight shake after extensive tune up

Cb87

New Member
Joined
August 10, 2020
Messages
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City, State
Newfane, NY
Year, Model & Trim Level
2006 Explorer XLT 4.0
Did the fuel filter, double platinum plugs, new AC Delco professional wires, sea foam top end treatment and an oil change today. Plugs are all gapped properly, noticed when in park the truck has a slight shake which it didn’t have before. RPMS are just a touch over 500 at idle. Any thoughts on what might be causing it? No CEL, and truck runs great down the road under normal driving only seems to do it in park. 98k miles, 4.0L
 



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Check your plug wires. It’s super easy to mix up the driver side on the coil. The cylinder numbers are on the coil, but they’re not in order on the driver side.
 






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Just a thought. If you disconnected the battery for any length of time when you did the tune up, the PCM probably reset itself to factory specs and your vehicle may just need to relearn them over time.
 












Just a thought. If you disconnected the battery for any length of time when you did the tune up, the PCM probably reset itself to factory specs and your vehicle may just need to relearn them over time.
Battery was never disconnected
 






Check your evap hose. Replace if it turns your fingers black.

Then look at this thread.
 






Check your evap hose. Replace if it turns your fingers black.

Then look at this thread.
I just had this happen after a tune up the line from the purge valve to the intake, to replace get 36” of 3/8 fuel hose it’s 7 bucks at advance auto, another lesson I learned from gremlins after the tune up was the throttle position connector wires losing their insulation just like the link above
 

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