MY99 Impreza 2000 turbo flat spots under load.
05 January 2015, 04:23 PM
#31
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Are you sure its a standard car, an easy upgrade was to fit the PPP ecu this would give you 1.1bar, if you have removed the center cat, your boost could be rising to quickly, once it spikes it gets pulled back, try building the car up slowly, don't floor it and see how it reacts, the boost control solenoid could case this problem.
To see if the Ecu has been changed, lift the carpet in the passenger footwell and remove the cover plate, it should have a pink sticker if its PPP, otherwise it should be a 801 or 800 series dependent on month.
To see if the Ecu has been changed, lift the carpet in the passenger footwell and remove the cover plate, it should have a pink sticker if its PPP, otherwise it should be a 801 or 800 series dependent on month.
After reassembling the throttle body, and i only touched the throttle body, I now have code 21 (engine coolant temperature sensor) and code 45 (pressure sensor).
What the hell is going on!!??!?!?! Any ideas?? I originally gave a slight adjustment to the wastegate actuator but now returned it to normal.
Am unable to drive car until knock sensor arrives so not sure if this has put the pressure sensor correct.
Sorry about the rant, loads going wrong!!!
05 January 2015, 09:57 PM
#32
Did you try building the boost up slowly, by opening the throttle slowly?
did it still over boost?
The throttle body would not cause the issues you have been experiencing.
Does the car have a standard exhaust.
The boost is being pulled back by the ecu, because its rising to high.
If the ecu is standard, you can check this by looking at the model code on the case 800 or 801.
The boost solenoid or associated pipe work can also cause similar problems, you can clean these out with brake cleaner.
Clean the solenoid by removing pipes, connect the diagnostic connectors under the dash board, switch on ignition but dont start the engine, the solenoid will be pulsing, spray in the top hole and the crap should come out the bottom.
The other problems check all you connectors to the various engine sensors for broken wires or dirty connections.
I know these are more questions but it will help with the diagnosics.
did it still over boost?
The throttle body would not cause the issues you have been experiencing.
Does the car have a standard exhaust.
The boost is being pulled back by the ecu, because its rising to high.
If the ecu is standard, you can check this by looking at the model code on the case 800 or 801.
The boost solenoid or associated pipe work can also cause similar problems, you can clean these out with brake cleaner.
Clean the solenoid by removing pipes, connect the diagnostic connectors under the dash board, switch on ignition but dont start the engine, the solenoid will be pulsing, spray in the top hole and the crap should come out the bottom.
The other problems check all you connectors to the various engine sensors for broken wires or dirty connections.
I know these are more questions but it will help with the diagnosics.
Last edited by Eprom; 06 January 2015 at 09:01 PM.
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