Question about 2004 Mitsubishi Lancer Evolution

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Have probelms with the boost, the car is far from full power. it is an evo IV

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Replace your recirculation valve

Posted on Jan 14, 2009

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What is a full load depression switch and where is it located at


has this car got ride level suspension? and/or mineral oil power boost braking system. if so I think the part you are looking for will be found on the valve block. or brake power boost actuator. if its got the teves brake it will be on brake master cylinder I think.

Apr 27, 2014 | 1991 Jaguar XJ6

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1st & 2nd gear, then complete loss of power. audi a4 tdi 2007


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.

Oct 29, 2013 | Audi A4 Cars & Trucks

2 Answers

Why does my evo 4 over rev when going through gears and loss of power when pushing the turbo is it a fuel problem


ive found that the walbro pumps looses presure when warm do u get fuel cut or over boosting jerking or poping

Oct 05, 2009 | 2004 Mitsubishi Lancer Evolution

1 Answer

Hello i am from creece i have an impreza 2000 turbo 1994 model . the car before 2000 rpm and 4000-4500rpm in full gas is cuting down very aggressive can you help me please?


This sonds like a boost issue as a fault in the waste gate or turbo could be the culprit.Using as boost gauge,verify proper positive boost in this power band range.

Jul 27, 2009 | 1994 Subaru Impreza

1 Answer

I have a 2002 Grand Prix GTP and i am having trouble with the supercharger. Most times only getting 1/2 boost on the guage and it runs like a regular 3.8l - the supercharger will ocasionally kick in but...


Check the vaccuum lines to the super charger boost control valve located on the back of the supercharger closest to the air cleaner opposite the pully. If you are not getting vaccuum to the boost control colenoide follow the vaccuum hoses back to the boost control switch and check for engine vaccuum at the switch.

Jul 14, 2009 | 2002 Pontiac Grand Prix

2 Answers

My evo 4's power cuts out under hard exceleration, as if its being starved or air or fuel... any ideas?


check the air intake pipes are not soft best way is to get sun1 to rev up as you was at a race and look for an air intake pipe is not compresing its self as if you was squeesing it, if it is changing pipe should have solved it,

Jun 05, 2009 | 2004 Mitsubishi Lancer Evolution

2 Answers

L200 warrior turbo fault,drives ok for miles then suddenly no power engine light on, turn off then on all ok again


iv only st come on here and seen this post i know exactly what this problem is. it's the waste gate in the turbo gets full of carbon and then over boosts itself and put on the engine management light and when you turn the key on and off it resets it. so what you have to do id take the turbo off and clean out the waste gate which is on the exhaust side and that will get rid of all your problems and the better you clean it out the longer it will last.

Dec 14, 2008 | Mitsubishi Pickup Cars & Trucks

1 Answer

Evo 7 gta auto, loss of power when putting your foot down, revs seem to go high but there is no real response with the boost. 1 garage seems to think its electrical and another thinks it may be the torque...


its the clutch. all evo VII comes with faulty clutch. just do some research over the internet and you will find out. its time for a stronger and better aftermarket clutch that can withstand all that heat it generates.

Oct 02, 2008 | 2004 Mitsubishi Lancer Evolution

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