[drewr1122]

Hi, don't know where else to post this but I have a question:

I recently blew my 2005 Civic coupe's d17a1, (spun rods, shrapnel in the oil pickup, bent crank, warped block etc) and found a good engine on marketplace. Only problem is it's a d17a2.

I tore down the VTEC engine and put a new head gasket in and decided to even put in the d17a1 intake on (it was cleaner). But I noticed that one of the sensors on the throttle bodies are different. One has 91 on it (the one from the a2) and the other has 90. Is there a difference? Engine runs no problem but auto transmission is a bit rough. Is this a VTEC specific sensor? Or a Transmission specific one? Any help would be appreciated!!!

 

[drewr1122]

You might consider changing to the ecu/harness from a d17a2 so you get the vtec solenoid working. The cam figure w/o it is very mild. ..I.e. big difference in mid and upper rev power with vtec working.

Thanks for the info. Quick Google search of the part number confirms it's an iac valve. I changed it to the d17a2 throttle and notice idle is a bit smoother. Transmission is still doing weird things, but it's a honda auto transmission from 2005, so I guess its just on its way out. VTEC ecu and harness not worth it, probably just wait for this one to die and get an 8th gen civic instead