I have eliminated all of my codes on this vehicle except the p1508. I purchased on from another fellow Honda guy but it was old and figured if 25 gets it going why not. It still throws the code. the motor is a d16y8 running on p2p. I ran it for a while to get all the coolant flowed through the motor and ran the heater to flush the heater core. I am still only getting that code. incosistant idle with slight accel. not to mention if I go to higher rpm and press in clutch it will drop and die sometimes. this is extremely aggravating. any help is deeply appreciated. also like to add the one that came on the car looked brand new. also did a ecu swap and received same code.

 

How many wires does the IACV have - 2 or 3?

Auto or manual transmission?

 

Two wire and manual trans.

 

Unplug the IACV.

Turn key to ON(II).

Measure voltage to body ground at the Yel/Blk wire pin in the connector.

What's the reading?

 

Pull the IACV, clean it, reinstall it, then re-bleed your coolant. Tell us exactly how you're bleeding your coolant.

 

P1508 indicates an electrical problem.

 

How are you suppose to bleed your coolant properly for installation?

 

Also mine isn't black and yellow I have a green and black/silver

 

Post a picture of the IACV connector and its wires. You may have the wrong connector plugged into the IACV.

Your IACV connector should have Yel/Blk and Blk/Blu wires.

 

Will look tomorrow to make sure... and just making sure that is for a obd2b wiring harness

 

Diagram is for OBD2b 99-00 Civic EX with MT.

 

Lmao okay it had the wrong plug on it... next question not cell codes I where does the green wire with black and silver go?

 

grn/black/silver?? No, each wire either has 2 color codes or a single color.

 

2 wires
1 green
2 black with silver

 

Post a picture. It's either for the radiator fan switch or the power steering pressure switch.

 

Will when home also have a one wire plug that is black/red

 

Contribute to the forum by posting the requested pics of all connectors discussed in this thread.

 

I will just have to get home after 5pm cst. And thank you so much for all the help so far.