ka24e exhaust sounds like crap has no top end power and back fiers a little bit

[wrestlerjmr]

i have a 1990 nissan 240sx with a ka24e that i just had the motor bored and rebuilt with a new head on it and it was runnin before with a bad head but when i put the car back togeather the car from the exhaust sounds like crap(which it didnt before i took it apart) and i does not have any power in the top end at all( did not do before also) and sometimes back fiers to which it aslo did not do before. I ahve checked the timing with a timing light like 10 times and it is in time? All of the vaccum lines are on right and do not have any leaks. I took the fuel rail off and all the injectors are spraying when i jump them but when the car is runnin and i take 1 and 4 injector wire off it kills the car like normal but when i take 2 and 3 wires off it changes nothing???? Like i said the motor maybe has 300 miles on it and we foiund out it had a bad head so we bought a brand new one with new cam and valvues and it started doing this as soon as we put it togeatheer and it is also blowing out a little blue smoke which it never did. I tapped the maf to c if it was bad while it was running and nothing happend i am stumped somebody plz help

[zerepdivad]

We had a similar problem with my friends sohc. Turns out his connectors in the injector clips were very loose and corroded and were not making good contact anymore. Most likely from people improperly removing them and yanking by the wire as opposed to the plastic connector.

We ended up just getting some little electrical connectors from my work that would fit right on each prong in the injector and cut the clips off and dirrectly wired them in and it worked fine.

[wrestlerjmr]

i also pulled the brnd new spark plugs i put in and they are wet and black now what tells the car to run rich? what do i have to do to fix the plug problem?

[KA720]

double check that you don't have the number 2 and number 3 plug wires mixed up, it's easy to overlook, I've done it once or twice, although if this is the case it's won't have much power at low rpms either