99 7.3 6 speed stalls on downshift coming to stop
#1
99 7.3 6 speed stalls on downshift coming to stop
For a few weeks now my truck has been occasionally stalling when downshifting and slowing to a stop. Doesn't happen all the time , but have noticed it seems to happen more when engine has warmed to operating temperature and when on a downhill grade. When I downshift and push the clutch in , the rpm's will drop so far as to stall. Sometimes though, rpm's will drop to around 500 then ramp back to normal. Also when it does stall , I can either pop the clutch , or key start it with no problem. It has 295, 000 miles on it, and still runs very strong. Any thoughts on what my problem might be would be greatly appreciated. Thx Bill
#2
It sounds like you have a sticky IPR. Last I checked riffraff had an o-ring replacement kit for it. Take it out and clean it and change out the orings and you should be good to go. Unless the coil in it is getting weak, then you would need to replace the coil. I don't think you can buy just the coil though, you have to buy the whole IPR.
Baatzy
Baatzy
#4
First thing I checked and tin nut is secure. Also tried replacing ipr coil before replacing ipr, and still no difference. Drove about 40 miles today and still have issue. Noticed something else today. On several starts , after engine turns over, idle is very low....not rough, just low then in 2 seconds ramps up to normal. Wondering if both are correlated, or separate issues. Always an adventure with these trucks!
One other thought though.....A couple of weeks ago when I changed my oil, I also changed the oil in my hpop reservoir . May have over filled a bit. Could too much oil be my proplem? It's not much ...dipstick reads a hair above grid.
One other thought though.....A couple of weeks ago when I changed my oil, I also changed the oil in my hpop reservoir . May have over filled a bit. Could too much oil be my proplem? It's not much ...dipstick reads a hair above grid.
#5
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I do not have anything to moniter the engine.
I do however have some new information.
In my neck of the woods today it was overcast and only got to the upper 60's - low 70's. I drove somewhere in the neighborhood of 70 miles and half of that was in the city. I did not have the issue rear it ugly head once! Every time I would come to an intersection and have to stop, I expected it to stall, but it never missed a beat! I'm now wondering if outside temperature and/ or engine compartment temp have something to do with it? Any thoughts guys?
I do however have some new information.
In my neck of the woods today it was overcast and only got to the upper 60's - low 70's. I drove somewhere in the neighborhood of 70 miles and half of that was in the city. I did not have the issue rear it ugly head once! Every time I would come to an intersection and have to stop, I expected it to stall, but it never missed a beat! I'm now wondering if outside temperature and/ or engine compartment temp have something to do with it? Any thoughts guys?
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