This happens Once in a while. I just fixed a P0171
code which turned out to be a hole in the Egr tube.
That tube was leaking for about 2 months.
these are the things I changed before the tube.
Pcv and 2 vacuum hoses
Fuel pump was tested and is ok.
Should I change the IAC valve to cure the shudder?
have the same problem?
Tuesday, October 19th, 2010 AT 8:52 PM