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The truck with the code 62 is my 1993 f250 N/A. The truck I'm doing the IP and injectors in is my 1994 f250 IDI turbo. I'm a fan of the 7.3 IDI'S LOL! Sorry for the confusion.
now i am confused LOL. i was refering to following eaton's 200+ post thread about his IP/injector problem.
David85 can correct me if I am wrong but can`t a code 62 be set on these trucks by an erratic tach sensor?
Absolutely
Originally Posted by eatont9999
My tach is about 200 RPM too fast, would that cause transmission issues?
Yes! Although torque converter slip is also often in the 200 RPM range so if the converter isn't locking, the reading MAY be true, but it depends on how you are verifying the tachometer as reading incorrectly.
Originally Posted by '94IDITurbo7.3
When i had my tranny light flashing it had code 62, i had the tach sensor replaced and code 62 went away and has been working just fine since.
Case in point
Originally Posted by LSO1123
Oh, I thought you were talking to me! I saw that tach sensor and wondered what it was. I'll check it.
Inspect the wires where the come out of the sensor, inspect the quick connect and the wires on both sides, and finally take a good hard look at the magnetic sensor probe itself. Look for any signs of metal filings or damage to the end of the probe. Anything like that can cause problems.
My TC does lock and it does so right before shifting into O/D as I accelerate. I get O/D somewhere around 43-45 MPH assuming my speedometer is correct. My tach is 200 RPM off according to my timing meter; it is a Rotunda unit. The wires on my tach sensor are bare where it connects to the sensor housing but they do not touch each other.
With something like that, it becomes a judgment call. You didn't mention if your transmission was acting up at all, but considering how critical the RPM sensor is for the OEM setup (in all years, not just 92 and up), I would be tempted to correct the problem now before anything starts to act up. If nothing else, your sensor will have to be replaced eventually anyway so having a spare on standby wouldn't be a bad idea.
Is the RPM off by a consistent amount across the range of the engine? generally what happens is the tachometer will read too low or even fail to register near idle, then wake up somewhere in the mid range. I've never heard of one before that reads too high.
If you're not having any issues with it yet, then you don't need to take any drastic measures (yet) but just keep an eye on it.
It reads about 950 at idle. The timing meter said 750. It may be off by a progressive amount but I didn't investigate it that far. I'll put it on my list of things to do. Right now, I am suspecting a bad IP, so I need to source a new one.
Sorry to hijack but I thought the sensor issue might be relevant.
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