tjg8675
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- Sep 3, 2007
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Hi all,
This is for my 95 bronco 5.8l 191,000mi
Starting a new thread for this...I have posted about this briefly in a previous unrelated thread and thought it was resolved but apparently that was not the problem...
My check engine light issue(s) have returned, I had forgotten to tighten my intake hose clamps at the throttle body and when I tightened them the problem seemed to go away for a few weeks until yesterday...
I started it up after work and let the warm up cycle run as per usual, a few seconds after the idle settled the check engine light came on and the idle stuck up around 1000-1200. I shut the engine off and waited a few seconds and restarted. The check engine light was still on and idle was still stuck 1000-1200. Previously when this happened it seemed to clear up after a short drive, so I reversed out of my parking spot put it in drive and attempted to leave but had NO power, it felt like it was in wrong gear so I shifted it down to "1" which was better, it still didn't feel like 1st gear but could slowly accelerate out of parking lot. When I got onto the road and gave it gas it wanted to bog/stall if I gave too much gas, so I went easy and got a little speed and shifted into 2nd then into drive. I approached a red light and the check engine light turned off and seemed normal for a moment until I stopped and the check engine light came on again (+ high idle) and turned off again, it turned on again so I shut it off and restarted and check engine was on and then turned off, light turned green and I proceeded cautiously and all seemed normal again. I drove a couple miles before the check engine light returned again so I pulled over and attempted to pull the codes but battery was dead in code reader, I shut it off and started it again the check engine light returned (+ high idle) and then turned off again, then on again and off again and stayed off. I was able to drive the rest of the way home with no further issue (seems to be OK once warmed to operating temp???)
When I got home I checked all vacuum lines (OK) and electrical connections (OK) pulled codes (all pass) then pulled PCM to inspect for capacitor leakage (at this point a bad PCM is all I can think of that could cause this strange behavior) and indeed the caps are leaking but all the legs are intact, a bit corroded, but still connected to the board.
I have new capacitors for the PCM but have not attempted to replace them, I want to have a replacement PCM available in case something bad happens during this process. So I went online and looked for a replacement but could not find one with the part #F5TF-12A48B75-BXA RoB0 (for an automatic transmission)
So now I'm stuck... its like something is shorting out, I thought maybe is caused by the rainy weather we've been having lately but am not sure.
Any input for diagnostic steps I can take or a lead to a reputable shop that has the PCM I need would be greatly appreciated!
Sorry for the long write up and thanks in advance for any help
This is for my 95 bronco 5.8l 191,000mi
Starting a new thread for this...I have posted about this briefly in a previous unrelated thread and thought it was resolved but apparently that was not the problem...
My check engine light issue(s) have returned, I had forgotten to tighten my intake hose clamps at the throttle body and when I tightened them the problem seemed to go away for a few weeks until yesterday...
I started it up after work and let the warm up cycle run as per usual, a few seconds after the idle settled the check engine light came on and the idle stuck up around 1000-1200. I shut the engine off and waited a few seconds and restarted. The check engine light was still on and idle was still stuck 1000-1200. Previously when this happened it seemed to clear up after a short drive, so I reversed out of my parking spot put it in drive and attempted to leave but had NO power, it felt like it was in wrong gear so I shifted it down to "1" which was better, it still didn't feel like 1st gear but could slowly accelerate out of parking lot. When I got onto the road and gave it gas it wanted to bog/stall if I gave too much gas, so I went easy and got a little speed and shifted into 2nd then into drive. I approached a red light and the check engine light turned off and seemed normal for a moment until I stopped and the check engine light came on again (+ high idle) and turned off again, it turned on again so I shut it off and restarted and check engine was on and then turned off, light turned green and I proceeded cautiously and all seemed normal again. I drove a couple miles before the check engine light returned again so I pulled over and attempted to pull the codes but battery was dead in code reader, I shut it off and started it again the check engine light returned (+ high idle) and then turned off again, then on again and off again and stayed off. I was able to drive the rest of the way home with no further issue (seems to be OK once warmed to operating temp???)
When I got home I checked all vacuum lines (OK) and electrical connections (OK) pulled codes (all pass) then pulled PCM to inspect for capacitor leakage (at this point a bad PCM is all I can think of that could cause this strange behavior) and indeed the caps are leaking but all the legs are intact, a bit corroded, but still connected to the board.
I have new capacitors for the PCM but have not attempted to replace them, I want to have a replacement PCM available in case something bad happens during this process. So I went online and looked for a replacement but could not find one with the part #F5TF-12A48B75-BXA RoB0 (for an automatic transmission)
So now I'm stuck... its like something is shorting out, I thought maybe is caused by the rainy weather we've been having lately but am not sure.
Any input for diagnostic steps I can take or a lead to a reputable shop that has the PCM I need would be greatly appreciated!
Sorry for the long write up and thanks in advance for any help
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