1999 Ford Contour Studder/Stall upon Deceleration and at Id

Tiny
CONTOURISSUE
  • MEMBER
  • 1999 FORD CONTOUR
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Car has the 2.5L V6. All o2 sensors were recently replaced (within a few months, for unrelated issue). Car began studdering/shaking/sometimes stalling when slowing down or stopped and the rpms got got lower yesterday. Previously replaced the iac valve to fix the same issue a few years ago with success. Replaced it yesterday and the problem improved but still had a slight shake, problem reappeared worse today and is hard to keep car running when slowing down or stopped. ECU gave codes P0171 and P0174 when scanned yesterday.
Tuesday, January 5th, 2010 AT 11:19 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
PO- 171 Fuel Trim System Lean (Bank 1)

PO- 174 Fuel Trim too Lean (Bank 2)

What I think you're looking for is a vacuum leak. Have you checked? Also, check around the intake.

Let me know what you find.

Joe
Was this
answer
helpful?
Yes
No
Thursday, January 7th, 2010 AT 9:02 PM

Please login or register to post a reply.

Related Engine Stall While Driving Content

How to Read Codes
VIDEO
How to Read Codes
Instructional repair video
Engine Stalls While Driving
GUIDE
Engine Stalls While Driving
An engine that stalls while driving and then starts back up again, either immediately or after a short time is different from an engine that just wont start or if the...
VIEW MORE