I just got my current ECU from DMCH just a few months ago, I'm pretty sure it isn't defective?is there any way to test the frequency valve part of it? How do I test the O2 sensor? When I changed the plate that mounts all the connections and coil on the engine bay bulkhead, I noticed wires cut and spliced into different wires [behind the plate inside the pontoon]; I noticed in particular one of the wires had a capacitor spliced in, was this a recall or update, or someone else's mess? It wasn't any of the wires from the FV plug though?-----Dani B. #5003 --- In dmcnews@xxxxxxxxxxxxxxx, "Elvis Nocita" <elvisnocita@xxxx> wrote: > Dani, > > is your O2 sensor ok ? you know how it can be tested, right ? > > I mean - if the ECU gets no correct informations - how should > it drive the FV correctly ? > > When you push the full throttle switch the FV signal is > set to a constant PWM to ensure a rich startup mixture (temp switch > is parallel to it) and also a rich mixture when going at max speed/full > gas. > > Of course the ECU could be defect, too. > Or a wire broken ? > > Do you have the possibility to swap the ECU ? > > Elvis > > > > Betreff: [DML] Re: Can someone explain this? (distributor positioning) > > > Okay finally an update; I just replaced each of these with brand new > equipment: Fuel distributor, CPR/WUR, +4 plugs, 8.5mm wires, Bosch > cap, Bosch rotor, and HP resistor. I've replaced with used > equipment: ignition distributor. I've tested/cleaned: mechanical and > vacuum advance, frequency valve and plug, grounds on both the left > and right side of intake, ground in compartment behind driver's > seat, cold start valve, and the injectors. The problem: my frequency > valve will NOT run continuously no matter what position the CO is > set to; it will not even run constant with the O2 sensor unplugged. > Like this, the car will start up after a nights rest, but warm-up is > rough with lots of black puffs of smoke and rough running until > warm; once warm it will be sluggish accelerating, but runs smooth > and gets me to where I need to go. The ONLY way to get the FV > running constant is through the full throttle switch-I jumped the > switch by putting a wire to both contacts of the full throttle > switch; this is how I've been running the car. With the FV running > constant, the car starts right up after sitting overnight with about > 30 seconds of slight rough running-and has the acceleration it > should. Since the FV runs when the switch is tripped it's obvious > that it works and has good connections going to it. What I am > wondering is why it won't run constant otherwise?Any ideas? ----- > Dani B. #5003 To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/