I posted a previous thread about a problem with my car but i am reposting a new thread with more knowledge. My car is misfiring and running rich. I did a fresh rebuild on the ls motor in my obd2 teg. It was missing b4 the rebuild but i am stumped. The computer is throwing 3 sets of codes.

Random Misfire in cylinder 3 and 4
Random Misfire in Multiple Cylinders
and code p0113 which is the IAT

The car only misses while its idleing. Runs fine. I am stumped until i did the code reading. Will the IAT cause this many problems. I am basically running stock execpt with I/H/E and test pipe.

I have already changed plugs, wires, and injectors. I am leaning towards the dizzy right now but before i spend 300 bux on a dizzy i want more info and input.

 

first change the IAT

 

do u think that would cause me to have all these problems?

 

Just changed IAT and still the same crap.

 

Pull the spark plugs again and inspect.. You could of fouled them

What ecu are you running..

Are you running a FPR or fuel pressure gauge?

 

The ecu is the stock one... i think its a p72 if i am not mistaken. Whichever comes on the ls integra in 98. I have the stock regulator as well

 

Does anyone think it might be the computer? Whenever i reset the computer the car runs fine for like 2 minutes and then it starts to act up all the time.

 

typical of bad wires - dizzy issues. even a bad plug. i've seen wires that get pulled a little too hard cause exactly this.

 

I consulted the honda manual. A random misfire would not be a dizzy problem because this only happens while accelerating. Low rpm or on load misfire would be IACV, vtec system, fuel pressure, or valve clearance.

 

You could have a bad injector or injector wiring. A misfiring injector will cause and missfire the other cylinders to run rich.

 

Bro... to be honest i believe u r right. I just finished swapping out the plugs, wire, dizzy, computer, IACV and nothing. I think it may be the wiring. How do i check that?

 

Check for proper ground and continuity between the ECU harness and injector plug with a multimeter.

 

do they make cables that long?

 

LOL. Yes. You can use any piece of wire for a multimeter jumper.

 

ah true.

 

gonna try to switch it to obd1 to see if it runs better.

 

i give up!