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Bad mpgs, engine hesitation at 3-4k RPM

Tiny
DAN.BURNS1896
  • MEMBER
  • 2005 CHRYSLER TOWN AND COUNTRY
  • 3.8L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 220,000 MILES
Engine hesitates (in drive and in park) between 3-4k rpm and will not rev above 4k rpm. Usually equates to hesitation getting above about 45 mph. Noticed significant loss in gas mileage. Idles smooth, no other noticeable adverse engine issues and NO check engine light. No codes displayed. MAP Sensor?
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Friday, July 22nd, 2016 AT 8:59 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuel pressure with a gauge auto parts rent it . then check for a vacuum leak
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Friday, July 22nd, 2016 AT 9:29 AM
Tiny
DAN.BURNS1896
  • MEMBER
  • 3 POSTS
Thanks. I've been meaning to change the fuel pump assembly since the gas gauge doesn't work ( one combo assembly) (very big pain in @$$ on T&C). But low fuel pressure could affect engine at a certain rpm range instead of full range?
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Friday, July 22nd, 2016 AT 10:31 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Yes so cold other stuff but you said no codes you should really have it scanned for codes again to make sure there are none. Auto parts does that for free
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Friday, July 22nd, 2016 AT 11:57 AM

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