The engine runs normal and the engine managementlight only comes on when i drive the car for a few metres.the Turbo exhaust manifold to glow red HOT but the car is not over heating and it still runs good?
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I would check your MAP or MAF sensor to be sure. Sounds like you are running lean which is causing your exhaust gas temperature (EGT) to be very high. Running lean with a turbocharged car will destroy your engine very quickly. Drive the car gently until you figure this out. P0109 OBD II Trouble Code
Also, it is common for the exhaust manifold and downpipe to glow orange if the car has been driven in a spirited manner. Although, normal (not lead foot) driving shouldn't cause your EGTs to be this high.
It is not really possible to "disconnect" a turbo. Its bolted to the exhaust manifold and all the exhaust gas is routed through it. you would have to try to find a header or exhaust manifold the was built for that car and not designed to run the turbo. Even if you were able to do this you would still have to have someone advance the timing back to where it should be for a natuarlly aspirated engine and re program the computer / change fuel enjector sizes to get the air fuel ratio back to ideal. (running without the turbo would cause your engine to run rich with fuel and cause engine fouling problems not to mention poor fuel economy.)
Remember, what is heard as turbocharger noise may not be caused by a noisy
turbocharger. Before replacing a turbocharger perform the following diagnosis.
A. If a loud whine or whistle is heard during acceleration
and increases or decreases with rpm and load. This condition is most often
the result of a loose clamp/hose at the turbocharger compressor outlet, charge
air cooler inlet, outlet or at the intake manifold.
1. With the engine running at idle and the transmission
in Park or Neutral with the parking brake set, feel for boost air escaping
at each connection between the turbocharger compressor outlet and intake
manifold. For limited access areas, spray soapy water on those connectors
and look for bubbles.
2. Check the exhaust manifold and exhaust system for
Turbo's are attatched to the exhaust, coming out of the exhaust manifold in the engine bay, regardless of whether it is a diesel or
gasoline engine. There is a oil hose attatched, usually, and about
2 or 4 bolts holding the round unit onto the exhaust system. Good
luck. They are about a few thousand $$$, so be careful.
Symptom: White smoke or water vapor from the exhaust. You notice white smoke coming from the exhaust when you start your car. If it is cold out, this may be normal. If the smoke does not disappear after the car is warmed, you have a problem.
Transmission fluid may be entering the intake manifold through vacuum modulator. The Fix: Replace vacuum modulator
Cylinder head gasket(s) may be bad. The Fix: Replace cylinder head gasket(s).
Cylinder head(s) may be warped or cracked. The Fix: Resurface or replace cylinder heads. (Resurfacing is not a DIY job)
The engine block may be cracked. The Fix: Replace engine block.
DTC 52 on a 93 Corolla is a Knock Sensor code. I replace the knock sensor; it is located on the side of the engine block, on the side of the engine that faces the firewall. It is in the center; under the intake manifold.
check the piping from the compressor outlet to the throttlebody for boost leaks. also check to make sure that the wastegate actuator is functioning properly. it may be stuck open. the other thing to check for would be an exhaust leak either between the head and the exhaust manifold or the exhaust manifold and the turbo.
if its none of those things, check the blades on the turbo (compessor and turbine sides) for damage and make sure that it turns freely