Hello, I have a 2003 evo 8 that I am working on the evo will start up and then it will want to stall unless i keep giving it some revs the car worked fine before until the customer/previous owner decided to mess with the boost controller he said he felt more power at first then after a few weeks he said he noticed the car went very limp and he noticed the symptoms of the car wanting to stall we changed the spark plugs we changed the fuel pump got a new air intake because last one was pretty busted up at one point the car wouldnt even start anymore but started again after the new plugs you could definitely tell it was burning rich by the smell and amount of smoke I have done a compression test and all cylinders read around 130 any information would help thank you

 

If you aren't familiar with troubleshooting, I would suggest finding a mechanic. Buschur Racing is in Ohio and I'm sure there are some others.

A few things you could try are a compression test to see if it has good compression at least. If that tests good, you could look at fuel pressure, a boost leak test, get the injectors cleaned, etc. There are tons of things you could look at to troubleshoot it but if you aren't familiar with troubleshooting cars, just take it to someone.

 

I am a bit hard headed hence the reason I havent taken it to anyone I am trying to learn more about cars but I have cleaned the injectors, previously I did get a overboost code but doesnt pop up anymore. I will do a compression test and see what happens thank you

 

looking forward to see some pics

 

this is the sprarks before ill take a picture of the compression test after too

 

plug in an OBD2 reader, see is its registering coolant temp. if the sensor is unplugged or broken that will read a "freezing temp" and use more fuel

 

I feel like the car would at least idol if this was the issue