Hi all, I have a "restricted performance" issue that has been going on for awhile now. Check engine has always been on (since I got her about 4 years ago) due to a small evap leak, restricted performance started up about a year ago - comes on after the car is on for a couple of minutes in city driving, then goes off when I get her on the interstate, then back on when slowed back down. First suspicion is a vacuum leak but haven't had any luck finding one.
Codes are: P0171, P0174, P0442 sm, P0456, and P1000. She's got just over 120,000 miles on her.
Car runs great - no performance issues other than limiting out at 3000 rpms, which is why I've let it go this long.
Any ideas are appreciated.
thanks much!
Codes are: P0171, P0174, P0442 sm, P0456, and P1000. She's got just over 120,000 miles on her.
Car runs great - no performance issues other than limiting out at 3000 rpms, which is why I've let it go this long.
Any ideas are appreciated.
thanks much!
Wingrider
Veteran Member
close
- Join DateSep 2016
- LocationStow Ohio
- Posts:3,481
-
Likes:237
-
Liked:879 Times in 731 Posts
Sounds like your small leak has increased.
After chasing mine, i found the eight gaskets.
Inside the intake manifold solved my P0171,& P0174 codes.
After chasing mine, i found the eight gaskets.
Inside the intake manifold solved my P0171,& P0174 codes.
Wingrider
Veteran Member
close
- Join DateSep 2016
- LocationStow Ohio
- Posts:3,481
-
Likes:237
-
Liked:879 Times in 731 Posts
By all means, DO eliminate any, & all other possibility's.
Before removing the intake manifold.
To replace those 8 pesky little gaskets.
Before removing the intake manifold.
To replace those 8 pesky little gaskets.



