Car has a P1491 EGR insufficient lift code. I have replaced the EGR valve, pulled the intake manifold and cleaned the EGR port on the manifold and on the head. They were completely clogged.
When I accelerate hard the CEL and TCS light come on again with the same code error. What else could be causing this error? O2 sensors? Possible faulty EGR valve? If so how does one check it? There are no vacuum hoses to it as it. Wouldn't it throw a different code if it was a faulty valve? I have also run a lot of Sea Foam through the system to see if it could clean out anything else. No luck so far.
When I accelerate hard the CEL and TCS light come on again with the same code error. What else could be causing this error? O2 sensors? Possible faulty EGR valve? If so how does one check it? There are no vacuum hoses to it as it. Wouldn't it throw a different code if it was a faulty valve? I have also run a lot of Sea Foam through the system to see if it could clean out anything else. No luck so far.
Sep 13, 2010 at 10:32 AM
