Help request for a 7.3 no start
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New User
Joined: Apr 2012
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Well I disconnected each of the sensors one by one and tried to start it. There was no change in anything. Does this mean the PCM is bad? What about the IDM? Is there anything I can do to check it?
Postmaster
Joined: Jun 2010
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From: Longview, TX
No, all that test did was rule out those sensors as causing the issue. Did you check the tin nut on the IPR? If it is loose it can create a no start.
Aside from that, I'd say that there's a strong possibility that the failed attempt to load the tune could have screwed up the PCM. I've seen no start threads end all sorts of ways, there always something else to check...
Aside from that, I'd say that there's a strong possibility that the failed attempt to load the tune could have screwed up the PCM. I've seen no start threads end all sorts of ways, there always something else to check...
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New User
Joined: Apr 2012
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No, all that test did was rule out those sensors as causing the issue. Did you check the tin nut on the IPR? If it is loose it can create a no start.
Aside from that, I'd say that there's a strong possibility that the failed attempt to load the tune could have screwed up the PCM. I've seen no start threads end all sorts of ways, there always something else to check...
Aside from that, I'd say that there's a strong possibility that the failed attempt to load the tune could have screwed up the PCM. I've seen no start threads end all sorts of ways, there always something else to check...
Thanks!
Laughing Gas
Joined: Aug 2010
Posts: 1,098
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From: Ventura co.
I would pull the pcm and clean the connections on the board. then try to clean out the plug connections. re-install and try again. maybe over time it has gotten some corrosion build up in the plug end
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New User
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Yesterday I pulled the PCM back out and cleaned the connections in both the PCM and the plug. I put the PCM back in but it didn't make any difference. Still same issues as before.
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The underlying issue here may be that I can't communicate with the PCM. The local Ford service department here said they could try to reprogram the PCM, but I would need to get the truck towed in to their shop. He said they need the whole vehicle and both keys to attempt the reprogram.
Hotshot
Joined: Jan 2011
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From: Puget Sound
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New User
Joined: Apr 2012
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At this point, I may need to try the reflash. I'll check DP Tuner out. Thanks!
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New User
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That's what I thought. All other efforts are an exercise in familiarity until this one issue is resolved. I would yank that VSM out just long enough to get the PCM programmed for stock (if possible). There is another active thread where a member (with no fuel pump signal) would likely be happy to sell is spare PCM... if it's compatible.
The VSM is pretty hard to get to. Do you think just pulling the fuse would work?
Hotshot
Joined: Jan 2011
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From: Puget Sound