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Explorer bucking at certain rpms.

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cavedweller3366
New User

Sep 3, 2010, 2:29 PM

Post #1 of 4 (1466 views)
Explorer bucking at certain rpms. Sign In
I have a 2000 Ford Explorer, 4.0 V6, SOHC, with 109,000 mi. 2 weeks ago, my thermostat froze closed. I didn't go as far as overheating that much...got lucky, caught it, and changed it. Truck ran like crap ever since. From the moment I buttoned it up, motor bucks at certain rpms (1600-2100) or when trying to climb a hill or pass another vehicle. I checked the air box/hose, redid all I did when i changed the thermostat, changed the AIC and MAFS. The plugs are new, the oil is new, the throttle body is clean. I just recently got a check engine light, but attribute that to the locking gas cap I just bought....I smell gas. Please help me so I don't go broke. :) Thank you so much for your time.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 3, 2010, 2:33 PM

Post #2 of 4 (1456 views)
Re: Explorer bucking at certain rpms. Sign In
Have you actually read the stored code?



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



cavedweller3366
New User

Sep 4, 2010, 3:57 AM

Post #3 of 4 (1448 views)
Re: Explorer bucking at certain rpms. Sign In
Yes, the code is an occassional P0442, Evap Sys Leak (small)....that is how it is worded on the OBDII. I started getting that code after I put an aftermarket locking gas cap on. I do get a fuel smell back of the truck. Thank you for your reply and inquiry. :) I appreciate any help I can get.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 4, 2010, 4:37 AM

Post #4 of 4 (1445 views)
Re: Explorer bucking at certain rpms. Sign In
It sounds like you haven't checked it since this problem started and are assuming it's only the same code.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.






 
 
 






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