PWM valve problems

rroelvaag · Post by **rroelvaag** » Fri Mar 31, 2006 7:45 am

I am using a Ford two pin PWM idlevalve but it doesnt receive any signal from Megasquirt. I did modify the board with the TIP121 transistor as described in the assemblyguide. I am using a Relayboard and I have installed the jumper on the Fidle relay socket. Am I supposed to connect the signalwire to the PWM on the spot marked Fidle on the 20 pin terminal? Tried but doesnt work.. (Positive feed is together with the injectors, as originally with EEC IV).

Ronny R

Bernard Fife · Post by **Bernard Fife** » Mon Apr 03, 2006 12:06 pm

Am I supposed to connect the signalwire to the PWM on the spot marked Fidle on the 20 pin terminal?

rroelvaag,

Yes. Have you tried this on the stim? If so, does the FIdle LED change in brightness as you change the coolant temp?

Lance.

rroelvaag · Post by **rroelvaag** » Tue Apr 04, 2006 1:03 am

Thanks for your reply, Lance.

I read somewhere in the manual about the jumper J1 on the relay board. Is this only used when using the Fidle relay, or do i need to install a jumper here to use the PWM valve?

thanks

Ronny R

rroelvaag · Post by **rroelvaag** » Thu Apr 06, 2006 4:49 am

Tried to hook up MS to the stim, but got no light in the Fidle led. Guess something is wrong inside MS.....
I have double checked the PWM idle modifications on the PCB, and the TIP121 transistor pin orientation. Everythings seems to be ok..
Any troubleshooting ideas?
(Running V3 board and MSII.)

Ronny R