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I have several PCM Computers from 1993, 1994 and 1995 and none of them had SMT capacitors on them. They are from 5.0L (3 PCM's) and 7.5L (4 PCM's) trucks.
I have several PCM Computers from 1993, 1994 and 1995 and none of them had SMT capacitors on them. They are from 5.0L (3 PCM's) and 7.5L (4 PCM's) trucks.
I am just wondering if those SMT capacitors were installed by Ford at the factory or were installed as a repair later on. None of the photos of OBS PCM Computers posted on this forum before these two and all of the PCM Computers that I have none had SMT capacitors in them.
Also the ones on youtube and the internet images do not seem to have SMT capacitors either.
I am just wondering if those SMT capacitors were installed by Ford at the factory or were installed as a repair later on. None of the photos of OBS PCM Computers posted on this forum before these two and all that I have none had SMT capacitors in them.
Also the ones on youtube and the internet images do not seem to have SMT capacitors either.
I would bet good money those SMT caps. are aftermarket repairs.
I would bet good money those SMT caps. are aftermarket repairs.
Sorry, but I think you would lose that bet.
Take a look at this close up from the other post. No rework, (you can always see marks from a rework), no solder through holes.
Now, I got curious and opened up a few ECU's I had lying around. 2 from 1994 with radial lead caps and 1 from 1997 with the same SMT caps shown in these pics. In all fairness, the 1997 ECU was EECV, but I'm just looking for construction technology of the same era. Other than my earlier post, I have no explanation?
Have you tested the data BUS voltage when this is going on? You could have a module in the network going bad. A Grand Marques came to me with similar symptoms. It ended up being the dash module dragging the BUS voltage down and causing things to freak out. It's worth checking.
Have you tested the data BUS voltage when this is going on? You could have a module in the network going bad. A Grand Marques came to me with similar symptoms. It ended up being the dash module dragging the BUS voltage down and causing things to freak out. It's worth checking.
Take a look at this close up from the other post. No rework, (you can always see marks from a rework), no solder through holes.
Now, I got curious and opened up a few ECU's I had lying around. 2 from 1994 with radial lead caps and 1 from 1997 with the same SMT caps shown in these pics. In all fairness, the 1997 ECU was EECV, but I'm just looking for construction technology of the same era. Other than my earlier post, I have no explanation?
You are comparing apples to oranges IMHO. EEC-IV to EEC-V technology are light years different. The SMT technology was available, there is very little chance Ford did a re-tool, or their providers, to adopt that technology for the soon to be defunct EEC-IV powertrain control computers.
I will stick with the comments from Bill aka Subford, non of his in-hand examples of EEC-IV computers for OBS trucks use SMT capacitors.
Subford the 94 or 95 pcm where they late 94 or early 95 and you said 5 litres. Is it possible that some truck's got the lead caps then they started phasing out those pcm's. It also could be possible the new 5.8 truck's with emissions crap got the new caps and slowly phased out the leads
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