More of a generic question, but it would help me decide if I want tolet Ford have at my Taurus, or just drive it to the damn scrap yardand get this over with.I have an OBD1 scanner (93 taurus) and in the past, it has given me afew codes that have helped with problems so I know it works, and Iguess I can say that I know how to run the tests. At the moment, withmy high engine speed problem, it shows no codes at all.All I have to go on with this statement, is that it is what folks havetold me, and that statement is that Ford dealer scanners can accesscodes that are not revealed by the $100 scanner that I am using. Ihave heard yes and no, but some are adamant that they can retrieveinformation that I cannot.As it is, I have no codes to go on. If Ford can dig out more, anduseful ones, then maybe I have to bite the bullet, but if I am goingto pay them $100 just to read the computer and come up with no codes,that doesn't seem like the right way to go.Anyone have any insight or comments? Are there "hidden codes" in theOBD1 computer that only Ford can view?Thanks,John

I had an idle problem with a 95 5.8 liter. It is also OBD 1. Icouldn't find any codes, and I finally took it to a Ford dealer. Theguy spent 45 minutes trying to diagnose the problem, and I went backinto the service bay with him. He couldn't find any codes either. Hetold me all he could do was hook it up to a "box" that would be inbetween the EEC and all the sensors. That way he could check eachsensor, and decide if it was a sensor, a short somewhere, or the EEC.He wanted me to leave it for at least 2 days. The open-ended billwould start at $300. As my vehicle was driveable, I didn't take himup on the offer.Good luck,Another John

Hidden Codes?

Nov 03, 2007 22 Replies

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John 18 years ago

Well, in 35 years of getting greasy, I have never seen a vacuum line that fixes itself, simply by having the power to the engine turned off and on....

I figure there are probably some things that ford can extract, which other machines simply cannot access, although I don't think the 93 computers have all that much intelligence anyway. I am sure that the OBDII versions hide a lot of things to force us into the dealer, but I'm a cynic when it comes to that anyway..

John

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ds549 18 years ago

not hidden codes, but there are procedures in the motor manual for no code drivability problems... lucas

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Fred 18 years ago

On my 89 Mustang I had to clean the throttle body, and then adjust the TPS voltage according to the procedure off a Mustang web site. Fred

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