ls3 conversion not crank situation

[andrewb70]

Well after i fixed the leaks and put injector cleaner in the tank the car is idling and responds to throttle. Theres some minor issues, i have check engine light on constantly and were unable to connect to the ecu. I checked the obd2 wiring and i noticed that there are two ground wires hooked together, signal ground and chassis ground, are they supposed to be on the same ground? While we were checking everything my brother noticed that my maf was unplugged on the second time we tested the throttle and there was no change to engines operation if it was plugged or not, is the maf sensor broken?

The engine will start without the MAF. Remember, when the engine is cold, it is in open loop. Without the MAF, it just reverts to a speed density tune.

Sounds like you're having multiple issues...

Andrew

[timopajala]

The engine will start without the MAF. Remember, when the engine is cold, it is in open loop. Without the MAF, it just reverts to a speed density tune.

Sounds like you're having multiple issues...

Andrew

Today we traced the data wires and confirmed that they are ok, we tried the obd2 reader on my friends car anf it did not work so thats why we cant connect to ecu. We started the car today and it run much better then before. No more wavy idle etc, might been clogged injector or something. Ordered new obd2 reader and waiting if we will connect the ecu with that. The mil light still stays on so need to find a way to connect and read the code/s