could somebody please help I have a lancer evolution 8 2003 and is having problems. when I turn on everything is fine but when I accelerated as the third time the car starts to fail and start to sound like an STI please someone help me thanks.

 

Firstly, what? Secondly, missfire maybe. Need more and clearer info.

 

Can you provide more details? i don't understand this "when I accelerated as the third time the car starts to fail and start to sound like an STI"? do you mean in 3rd gear?

 

I changed spark plugs, new coils, new walbro fuel pump. i turn on my car it warms up as normal but when i give it some gas by the 2 time i give it gas to rev up the engine a little the car starts to misfire like if its running with 3 piston

 

one thing i forgot to mention i have a check engine light on code are P0335,P0340 wich is cam angle sensor and crank. i change the cam angle sensor wich is easier to get but havent got to the crank can that be it. and if its the crank sensor would the car not start at all???

 

what kind of EMS do you have? do you have a after market FPR?

 

Stock ECU. and the car is completly stock except a downpipe and exhaust system

 

Sparkplugs maybe ??? Check them out Lmk

 

i Bought new spark plugs NGK. and new coils and still the same i turn the car on its sounds normal but when i give it 1 or 2 revs the engine sound like its on 3 pistons like if you unplug one of the spark plug coils but all of them are connected

 

O ya make sure the new coils packs u have ..are put on the right way back

 

i put the same coils on another evo and it works fine but when i put them in my car it still misfire

 

so im thinking if the crank sensor can be the problem since i already change the camshaft sensor

 

I'd Get the CEL's taken care of first and see if it goes away. Also do a compression test, its easier than changing the CAS and could be the problem too. But since you said you have the CEL for the crank and cam sensor i'd assume thats what it is.

I do have an extra Crank Angle Sensor if you need to buy one, PM me if you want to buy one

 

Just because spark plugs are new doesn't mean they are good, that could always be causing your problem. Pull all the plugs out and look if they have oil on the end of them (the side that sparks). If not, put your old plugs in and see if it weakens or makes it worse.

 

Did you gap the plugs? Or buy pregapped plugs and put them in--but didn't check? Start rt there.