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- From: kenny@osf.org (Kenneth Crudup)
- Subject: Re: 90 Escort GT engine race at idle ?
- Message-ID: <1992Aug18.153009.18226@osf.org>
- Sender: news@osf.org (USENET News System)
- Organization: Open Software Foundation
- References: <1992Aug17.141644.26469@unvax.union.edu> <1992Aug17.232156.20962@tandem.com> <Bt5xzH.110@news.cso.uiuc.edu>
- Distribution: usa
- Date: Tue, 18 Aug 1992 15:30:09 GMT
- Lines: 87
-
- In article <1992Aug17.232156.20962@tandem.com>
- norcott_bill@tandem.com (Bill Norcott) writes:
- >As stupid as the EEC-IV is, it will still spill out trouble codes
- >with this kind of problem, so instead of 11 (normal) it will emit
- >13 (idle speed) or some such.
-
- No, it won't. Since the EEC-IV engine "computer" has no real control over
- idle, Ford's engineers "forgot" to add in a trouble code for it. (OK, OK,
- "idle" is a hard phenomenon to check, but you get the idea). Seriously,
- my experience w/the EEC-IV is that by the time the car reports a trouble
- code, the subset is so damned simple, and the tolerance is so high, that
- any half-competent mechanic (even me!) knows what part is bad anyway.
-
- In article <Bt5xzH.110@news.cso.uiuc.edu>
- jsc52962@uxa.cso.uiuc.edu (Jeffrey S. Curtis) writes:
- >Is there any way for normal humans to read the codes off the EEC-IV,
- >or do you *have* to pay the $50-$60 for your friendly Ford dealer to do it?
-
- No you don't. I do it for my Merkur all the time, and you can too.
-
- Special equipment required:
-
- 1 - (one) Chilton's Electronic Engine Manual (or something like that; I forget
- the exact name), for exact procedures for your vehicle, and for
- deviations from the code. Price: $20. Make sure you get the domestic
- model, and the right year set. I bought mine at an ADAP (ie, just a
- basic aftermarket parts store).
-
- 1 - (one) Analog VOM. Rat Shack's got 'em for about $10 nowadays. DON'T get
- a digital one, you'll need the meter to see the swing.
-
- 1 - (one) Pair of alligator clips. 10 come from Rat Shack for about $3. Get
- the small kind so they fit into the holes in the connectors. If you
- get fancy like I did, you can crimp male spade lugs on a 1/2ft or so
- of wire, so they fit into the connectors normally.
-
-
- Essentially, the procedure is to find your ST (self test) wire, and ground
- that. There's a prism-shaped connector, usually on the passenger side of the
- engine compartment, and in the same harness, a self-hanging connector. (Now
- you see where the Chilton's book comes in handy). The self-hanging connector
- is the ST lead. In the prism connector is a convienient ground, but your
- battery's probably right there. You then find the output lead on the prism
- shaped connector (...RTFM), and attatch the negative lead of your VOM
- (on a 10-15v scale) to that, and the positive lead to the + of the car
- battery (there may be a lead for that, too, in the prism-shaped connector,
- but I just find the battery convienient.)
-
- There are two modes- KOEO (Key on Engine off) and KOER (Key on Engine running).
- KOEO is for getting stored trouble codes out. KOER is a dynamic test, that
- may also require actions taken after the test is started (once again, the
- Chilton's is invaluable to Xref your particular car. My 'Ti requires the
- brake pedal to be depressed after the "separator" code (beats the hell outta
- me why, too), and then the throttle to be "goosed" (WOT for a quick second)).
-
- KOEO is the easiest. Ground your ST connector, turn your car on, and watch the
- needle. The codes will come out of the computer serially, with a space between
- the digits, each code repeated twice, then the next if any, and then it starts
- all over again. (Once again, RTFM, 'cuz I think there's something in front of
- this, but I don't remember.) Code 1-1 (Allegedly all signals OK) will come out
- like this:
-
- Sweep (2 sec) Sweep (4 sec) Sweep (2s) Sweep ....
-
- and say, 3 - 4 like this:
-
- sweep (.5 sec) sweep (.5s) sweep (2s) sweep (.5s) sweep (.5s) sweep
- (.5s) sweep (4s) (then all that again, then the next code, if any)
-
- Since, for example, 6-7 means one thing on your car, and something else on
- another, get the manual. It's lifted right out of the Ford Engine Diag book,
- and is quite simple, and easy-to-follow, as your typical Ford mechanic has
- to be able to understand it.
-
- See, all this hoopla about electronic cars and special equipment is BS to
- me, because no automaker (today) is gonna build a car that a qualified
- mechanic can't fix. Word gets out about that, and sales will fall. I've
- yet to see an electrical/electronic component that I can't diag or work
- around, given the right information.
-
- good luck,
- -Kenny
- --
- Kenneth R. Crudup, Contractor, OSF DCE QA
- OSF, 11 Cambridge Center, Cambridge, MA 02142 +1 617 621 7306
- kenny@osf.osf.org OSF has nothing to do with this post.
- Not one of the "PC" weenies.
-