Search results

So I got around to doing the OS calibration this weekend. Set the two pieces of the sensor so that the right edge of the top piece was 1/3 width as the left edge, relative to the bottom piece. Also, just put the entire sensor about center between the inner walls of the pump. Re-assembled...

Hmmm, using regular diesel as far as I know. Warm idle timing is now 11.5. Did a relearn and that didnt change but TDCO went from -0.79 to -1.41 without moving pump. Fuel rate still around 17mm. Maybe OS not calibrated?

Wait, don't go away yet Buddy.:hihi: I rechecked my fuel rate and now it is too high at idle. It is about 16mm warm idle and idle is about 680-715rpms. Also making a slight rattle or knock. Do i need to do a relearn after putting the resistor in the PMD? Maybe the ECM doesnt know it is a 5 value.

Looking back it seems the cause of not being able to set the TDCO was probably because in the beginning the pump was too far retarded. Then, when it was in the right position, I didn't complete a relearn because once it warmed to 170F the engine would either stall or blow smoke so badly that I'd...

I was able to set the TDCO before finding the missing resistor. Once set it was clear something else was causing the bad symptoms because they remained: erratic idle, shaking and bumping of the whole truck and horrible pedal response. Only the smoking went away once TDCO was in the good range...

That's some good stuff there Buddy. I've got some reading to do now. :-) I got the problem solved! You were on the right track with fuel rate. It turned out to be the PMD - it was missing the resistor! I must have forgot to put it back in several months ago when I started the engine overhaul...

So, the fuel rate when engine warm should be around 8mm? Cause I'm seeing 0-1, 2.5mm max. If that's not right, then is the OPS bad or just uncalibrated?

Yes the coolant temp does change on the scanner. Did get a p1214 at one point but since moving the IP has not returned. Idle rpms are around 600 but if you tap the pedal rpm jumps and stays at 1100 until you put it into gear. I'll have to try pulling the CPS and OS connectors tomorrow and see...

Ok, actual and desired are 12.5 degrees cold. Then at 170F desired is same, but actual is like 2 or 3 degrees. Yes, it has been as far as 2 mm to the driver's side of the timing wedge. At that point the FSO was leaning slightly and 1/2 inch from the rad hose. Have not swapped the CPS but did...

Yes, I do have a scanner. What I saw was when cold (under 170F) desired = actual timing. Then 170F hits and actual drops to 2 or 3 degrees and it starts smoking like crazy. Old IP symptom was hard/no starting while warm until I poured cool water over it. Then it would start. The rebuilt pump I...

Hi Folks, Anyone know if the IP timing stepper motor should move up and down at all times or only when engine over 170F and/or doing a TDCO relearn? Because I'm thinking the fact that my TSM doesn't move at all might explain why the timing is all over the place - idles poorly when cold...