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This sounds like a limp home mode problem, but your car seems to old for this! lets start at the beginning, check all brake lights work and replace any that are not working or seam strange, ( the system looks for braking to starve the engine of fuel), then look at all emission control sensors start at the lambda, then check your induction vacuum for leaks. if this does not disclose the fault, it will most likley be the air mass sensor.
I presume you experienced a loss of full power but had enough to get home. The check engine lamp came on too?
It seems your engine is in limp mode due to a possible over boost pressure . The ECU runs the engine with reduced power after an over boost is detected. If you cycle the ignition key and power comes back, this is most likely problem.
A fauliy N75 solenoid, with three small bore vacuum hoses and an electrical plug/connector, is possible cause .
This over boost can be caused by sticking vanes inside the turbo .
Have it scanned and read the codes. Code P0234 will be set if over boost occurred.
What I would suggest is taking the car to an autoparts store and have them scan the computer for any fault codes that it has stored. Most parts stores will do the scan for free. That should eliminate the need for speculation. It could be an emission related problem or it could be something totally unrelated. Better to get the codes to narrow down what the computer has noted. Hope this helped and best wishes.
Fuel problem or the ECM and or chip has a 80mph limiter. Or your really winding out the engine, in which case, by the time you read this it will be too late.
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