P0491 Fault Code
#17
Burning Brakes
Joined: Mar 2003
Posts: 765
Likes: 1
From: Dallas, then Annapolis - now Laguna Beach CA. Well, not so fast - I'm back in Dallas. For good!
I will go back in there and clean up the installation. Got a few lines that need to be re-routed to prevent chafing, and I'll zip tie those small lines as well.
Since I didn't find any split lines or loose fittings, I wanted to hurry and drive it to see if the DV valves fixed it. Blowing through the old valves confirmed it.
The happiness of fixing it almost overides how pissed I am about the Tuner shop that tried to f@*k me... Almost.
Thanks for the advice along the way, Kevin.
Since I didn't find any split lines or loose fittings, I wanted to hurry and drive it to see if the DV valves fixed it. Blowing through the old valves confirmed it.
The happiness of fixing it almost overides how pissed I am about the Tuner shop that tried to f@*k me... Almost.
Thanks for the advice along the way, Kevin.
#21
Not sure, but take a look over on renntech.org - there may be info for non-turbo. (you have to join)
#22
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Joined: Sep 2003
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From: Under Your Car
Other than that, check the vacuum lines or the SAI Valve which clogs just like they did on the 993's.
#23
I had my diverter valves replaced and soon had a similar issue and would not make full boost (peaked at 0.7 instead of the usual 0.9 on an X50). It also made a strange noise when you'd get on the power. I too found the problem to be a vacuum line that had come loose. Good luck with your issue.