i have a dc2 just did a ls vtec build b18a1 block b18c1 head and it seems to be the warmer the car gets the slower it gets there is also alot of black smoke from the muffler it goes away after it gets a foot from the tail pipe but it makes the back of my car hella dirty i am wondering why this is happening also how can i fix this. the car dosent overheat and runs better on the freeway after i get it to 80. there is no other color smoke so i dont think its a blown piston ring or anything like that and the car also looks like it has a tiny fuel leak from one of the injectors?

 

Was the Motor broken in correctly?

 

stock or aftermarket FPR?

 

TPS and MAP plugs are backwards

 

Never would have thought of that but it makes good sense

 

tried switching them and it made it worse

 

If your in tampa i can fix it

 

Next step is to find coolant sensor that provides ECU with input (thermistor). If it is not working the ECU will tell the injectors to be open more as if the engine is always cold. Google how to check and location for your particular engine.

 

black smoke means its running too rich, which is why its slow too much fuel being dumped into the motor, do you know if your O2 sensor is working properly