I would like to know if anyone has done a manifold swap on a '95 4.6 to resolve the EGR valve access issue and will the '97 manifold and pipe fit without mods?
I cleaned out the port on the back of the intake manifold and the TB housing channels on my 94 Tbird, now I have a check engine light for too much EGR flow. Any clues?I tried to clean the EGR tube on the car - it couldn't be done. 220k miles of baked on oil deposits would not blow out, despite days of soaking in GM top engine cleaner, and hitting it with 120 psi.
If you're at about 150k or less, you can still clean out the port on the back of the intake manifold and the throttle body housing channels. Very tedious and time consuming picking at that baked on crud, but worth it in the end.
Well my motivation is actually two fold, yes of course I have the check engine light with the EGR code but it seems to me as well a case of bad engineering and swapping to the newer intake manifold relocates that EGR valve in a more accessible spot for maintenance to the top of the engine rather than between the back of the engine intake manifold and the firewall.What's the motivation? Performance issues? Check engine light? I've removed and cleaned my 95 LX 4.6 EGR tube to resolve check engine light codes and renew the registration. It wasn't easy, but seems it would be easier than a complete exhaust manifold and intake manifold job. At least as Plan A.
Yeah, enjoy the increased gas mileage! When I had the "excessive EGR flow" on my old 95, I got a good 2-3 MPG more, got as high as 31.5 on the hwy and 24 city. The code will go away eventually.I cleaned out the port on the back of the intake manifold and the TB housing channels on my 94 Tbird, now I have a check engine light for too much EGR flow. Any clues?