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Old 12-01-2007, 08:46 PM
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To buy, or not to buy

Hey all! Here's my story, looking at a 94 F-350 XL 7.3 4-spd Dually for sale that has a small amount of white smoke (maybe I'm colorblind and there's some blue in it) at idle and LOTS when it's revved up. Seems to run good, and the lady selling it says she was told it needs a turbo because it's leaking oil into the intake. It didn't look like anyone actually took off the turbo recently, and she isn't too keen on me digging to deep into it before I buy.
Questions I have to you guys (because I'm more familiar with the newer 6.0's):
1) anything about 94's I should stay away from if I can easily spot it
2) would it reliably haul a 12,000lbs total weight trailer uphill 6,000-10,000 ft above sea level (her hitch is rated to 10,000lbs so I can't test run) and added weight of steel flatbed
3) does the fact she's been using B20 bio for awhile cause probs (sticky injectors?)
4) are there any mods as far as chips, exaust brakes (even using the EBPV),
etc, that are RELIABLE as this would be a daily work truck with the trailer?

Thanks for any help! DJ (not THAT DJ!)

Last edited by DJDiesel; 12-02-2007 at 01:56 AM.
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Old 12-01-2007, 08:56 PM
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is it a powerstroke. (electronic) or an idi diesel? (mechanical)
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Old 12-02-2007, 01:01 AM
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It is a powerstroke and (due to the lack of the injector pump on top like the older F's) I'm guessing electronic. I did notice a valve cover spacer with a wire harness plugged into it if it helps to identify it.

-DJ
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Old 12-02-2007, 01:13 AM
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There were some 94.5 PSDs made with 5 speeds. If it has the valve cover gaskets with wiring sockets like you said its one. It should be OBD I compliant and can be rezapped by the dealer to OBD II diagnostics. It can be chipped, piped and modified just like any other PSD. Dual mass clutch/flywheel should be replaced with single mass setup like LUK.

Last edited by masami; 12-02-2007 at 01:18 AM.
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Old 12-02-2007, 01:15 AM
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'94 was the first year for the DI turbo charged powerstroke I believe. Anything before that is IDI.
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Old 12-02-2007, 01:43 AM
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Quote:
Originally Posted by masami View Post
There were some 94.5 PSDs made with 5 speeds. If it has the valve cover gaskets with wiring sockets like you said its one. It should be OBD I compliant and can be rezapped by the dealer to OBD II diagnostics. It can be chipped, piped and modified just like any other PSD. Dual mass clutch/flywheel should be replaced with single mass setup like LUK.
Well, not sure of prod date, and this'll sound airheaded, but the shifter had four speeds then an overdrive gear.
I did see it had the familiar trapezoidal diagnostic connector like the gassers before OBDII and it seemed the PCM was right there on the driver's inner fender under the hood. If this one fits what you are describing, is it as simple as a rezap of the of the pcm and just retain that connector or upgrade the wiring/PCM unit and chip?
I realize this prolly won't help the smoke, but I appreciate the info!

-DJ

Last edited by DJDiesel; 12-02-2007 at 01:54 AM. Reason: typo
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Old 12-02-2007, 01:59 AM
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Overdrive is considered the 5th speed
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Old 12-02-2007, 07:27 AM
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Quote:
Originally Posted by alabamafrog View Post
Overdrive is considered the 5th speed
Thanks, saved me a potential future ribbing from the parts counter guys!
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Old 12-03-2007, 12:31 PM
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Another update, lady says a compression check was done (and was OK) and mechanic suspected the turbo causing the oil smoke, even though the turbo is a year old.
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Old 12-03-2007, 01:13 PM
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IIRC I think they sold 3 different 7.3 motors in 94. A non-turbo, a turbo IDI, and a power stroke (turbo Direct Injection). There will also be an engine cover that says Direct Injection but both the IDI-Turbo and the Powerstroke got the "turbo-diesel" badges...The Powerstroke badges were not seen untill '95. All the '94 powerstrokes went into 5 speeds.
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