Ok, I have been experiencing a intermintant start/no start with my 00 EX. I got a scanner and pulled two codes-P1670 and P1249. Searched for both and found out it might be the IDM relay under the hood. I found it and pulled it out. Is there a way to test the relay to see if it is stuck open or do I test where it plugs in? Now to the 1249. If I understand correctly, there is a rubber tube coming off the vacuum actuator on the turbo that gets plugged up with soot. Is that what I need to pull off and clean? Thanks for the replies.

 

Bump. I would appreciate some help on this one folks.

 

Heres all the possibles on 1670
Open fuse
IDM relay
Open or shorted IDM enable circuit
Open/short in EF circuit
Open/short in FDCS circuit
IDM powering circuits
PCM
easiest way to check it is swap it with another relay next to it and see if the problem moves with the relay.

DTC P1249 indicates that the PCM detected the turbo was overboosting
Possible causes
short to ground
plugged WGC hose or port
WGC solenoid
WGC actuator
WGC valve
damaged PCM

Take the red line off and see if you can blow through it.
The exhaust backpressure tube is the one that normally gets clogged with soot

 

Thanks for the reply. I have a Banks Power Elbow on this, for at least eight months. It doesn't have the flapper valve in it, consequently that little arm is not attached. I'll swap out relays and clean out the tube.

 

A bump for anyone else that wants to chime in.