2012 Dodge journey Crew 6 cylinder FWD
1. history: gear shift hard some times during wither (more), some times in warm weather. Dealer had updated the software or flashing the PCM couple times, but not sure if there is any updates from about 2 years ago (when I got the last update). Generally, gear shift big bang disappear after update.
2. two days ago, car rpm jump up when slightly touch the gas pedal, then check engine light on.
after changed engine air filter (dirty), the gear shift big bang comes every time when shift gear from parking to any position.
any advice for trouble shoot?
Based on my reading from this forum:
Causes maybe:???
1. Mass air flow sensor dirty, need to clean
2. solenoid pack,
3. update the software for PCM
4. problem from the TIMP
5. transmission fluid change...
6. fuel pump filter clog: refer to the following
http://www.dodgejourneyforum.com/topic/2656-transmission-problem/
Thanks.