SOURCE: manual shift mode and exhaust leak
You most likely have a broken wire in the steering column that goes to the manual shift mode switch. And as far as the exhaust leak goes, you need a new manifold. They crack and leak. Common problem.
SOURCE: oil leak on manifold passenger side - v6 4motion
Get a can of Gunk and clean the engine according to the directions there (please do read them), with attention to the area around where the oil leak is. Once you get the motor squeaky clean, you will be able to trace back to where the oil is coming from. It may be running down the underside of a hose so you will need to look carefully. You can do all this in the driveway. You will probably have to let the engine get to operating temp before it will start leaking.
SOURCE: exhaust manifold leak-2001 sequoia
toyota has a big problem with exhaust manifolds craking be hind the heat shields. will have to reolce both sooner or later.not an light job.
SOURCE: 95 f150 4.9L leaks from exhaust manifold with a
You might have a warped exhaust manifold, or head. You can check this with a straight edge and a feeler gauge. Also check for hairline cracks.
Is the carbon on the outside of the injectors, or on the inside? If it's on the inside then it could be from cheap gas. Do a fuel injector service to get them cleaned out.
If you had exhaust leaking into the intake manifold you would definitely know about it(backfire).
SOURCE: removing exhaust manifold
http://tearstone.com/eclipsefsm/15.PDF
(Click this link)
This is the section of the factory service manual that deals with the disassembly and reassembly of the intake plenum and the exhaust manifold. The posted numbers is the sequence of the disassembly and reverse when you are ready to put it back together. Torque values are also displayed. The exhaust manifold teardown for the 3.0L engine begins on
PG. 17
feel free to contact me if you require more help
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