03 mazda protege 2.0 exhaust valve1/9/2024 ![]() If the turbocharger actuator is not able to adjust the turbine vanes the charge air pressure increase too much and ECU (engine control unit) go in "limp mode" = engine protection software. ![]() The problem is that the soot particles deposits inside the turbocharger plugging the variable nozzle geometry mechanism = adjustable vanes of the turbine. In the most cases for Audi 2.0 TDI the turbocharger is responsible for engine losing power.ģ. You must be able to extract the turbo from the engine and then to disassemble the turbocharger, clean inside adjustable vanes mechanism and refit all. As a result the "limp home" mode engine still running until you turn the engine off (ignition switch off) and back on when the "limp mode" is deactivated, but the fault still remain in ECU memory!Ĥ. ![]() If the turbocharger actuator is not able to adjust the turbine vanes the charge air pressure increases too much and ECU (engine control unit) goes in "limp mode" = engine protection software. If you can not reach this with your mouth, then you go to step 3.ģ. If you can do that with your mouth, then you must replace the boost-pressure control solenoid valve. The mechanical connecting rod of the turbocharger actuator must have a smooth and whole motion. Instead of the original hose you must place another 1 meter long hose with the same inside diameter, and then you check to inspire yourself the air from the other one extremity of this hose. Extract the hose of the turbocharger actuator = pressure unit for boost-pressure control part of turbocharger. If you find something wrong replace parts. Also the vacuum connection between tandem pump and brake booster. Check all pneumatic connections and hoses between turbocharger actuator = pressure unit for boost-pressure control, boost-pressure control solenoid valve, vacuum reservoir, EGR control solenoid valve, intake-manifold flap solenoid valve, EGR valve with throttle - part of intake manifold. Fml lol.In your case the turbocharger is responsible for engine losing power.Īfter scan the EDC-15P engine control unit with a VAG or KTS -BOSCH diagnosis tool you will find this: Fault code: P1557-Turbo Boost pressure control exceededġ. Any help would be appreciated! I also just noticed this is a mazda3 forum. What sucks is there is no dyno tuners for a couple hundred miles from me. Nor am I trying to buy a pre programmed ecu. Does anyone have any direction for tuning once it’s built? I heard piggy backs aren’t worth a sh** either. I’ve been looking everywhere, is dyno the only answer to tuning this car? Im not buying an odb2 chip, Cobb doesn’t make an accessport for this car either, they have the mazdaspeed 3 and up. Still have yet to rip it fully apart, gotta find out the turbo specs and whatnot/order the rest of the parts. But Im really hoping the egr fix will help. I know the ecu will try to compensate for mistakes, I unhooked the heat temp sensor or coolant sensor and for a little while it would run just fine. Someone put a front mount intercooler on this car already and it seems to be in decent condition, has a Borla exhaust turbo back… What I’m really trying to figure out is how can I tune this thing?! I’m hoping that it will run better after rebuilding and getting the egr system working again… it was really finicky, had to be super light on the gas pedal, or else it would “glug” out as if getting too much fuel. ![]() possibly a new radiator/fans, turbo, coil overs. As well as pistons, rings, valves, valve seals and cleaning the entire engine out and or all parts in there I can possibly clean. I’m rebuilding an 03 mazdaspeed protege 2.0 turbo and I’m replacing a lot of electrical parts-ignition coils, spark plugs, camshaft positioning sensor, throttle positioning sensor, coolant temp sensor, knock sensor, oxygen sensors, maf sensor, map sensor, idle air control valve, thermostat, fuel injectors, fuel pump, vacuum lines, EGR hose, which was for some reason sketchily “deleted” improperly and they just capped off the exhaust return line because it broke is what I’m guessing(hanging loose in engine bay) still connected to intake manifold. ![]()
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