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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!elroy.jpl.nasa.gov!ames!kronos.arc.nasa.gov!chucko
- From: chucko@kronos.arc.nasa.gov (Chuck Fry)
- Subject: Autolite PowerSeal wires not recommended
- Message-ID: <1992Jul27.152650.15354@kronos.arc.nasa.gov>
- Sender: usenet@kronos.arc.nasa.gov (Will Edgington, wedgingt@ptolemy.arc.nasa.gov)
- Nntp-Posting-Host: mccarthy.arc.nasa.gov
- Organization: Recom Technologies, NASA Ames Research Center, Moffett Field, CA
- Distribution: na
- Date: Mon, 27 Jul 1992 15:26:50 GMT
- Lines: 48
-
-
- I had previously gone on record in this newsgroup saying that Autolite
- PowerSeal spark plug wires seemed to be OK. Yesterday, I discovered
- to my dismay that they are not.
-
- My roommate had been complaining about her '87 V-6 Taurus "sputtering"
- on acceleration. I test-drove it and sure enough, it would backfire
- when the throttle was tromped. At first I thought the oxygen sensor
- had failed again, since this car had had a similar problem a year ago.
- At that time I had replaced the plugs, wires, distributor cap and
- rotor. The replacement wires were, of course, Autolite PowerSeals.
- All other replacement parts were Motorcraft, the OEM brand.
-
- I changed the air filter, since I knew it was at least 6 months old.
- Then I checked and regapped the plugs. While well used, they looked
- OK; the gaps had grown from the original .044" to about .050" or more.
- The color of the insulators indicated a moderate lean condition,
- normal for a modern fuel-injected motor.
-
- But in the process of removing two of the plug wires, I tore two of
- the boots, one completely separating. The wire inside the completely
- broken one had obvious signs of overheating at the termination. It
- appears this wire had never made a good connection, and a year of use
- had caused the insulation and the boot to become brittle. I suspect
- that the plastic used in the boots does not stand up well to high
- temperatures, and the temperatures behind a V-6 in the Taurus must get
- pretty fierce. But that does not excuse bad terminations right out of
- the box. So much for lifetime guarantees.
-
- I replaced the wires with an "el cheapo" silicone 8mm set (since my
- roommate hates to spend money on cars). The problem seemed to have
- been fixed to my roommate's satisfaction. It appears the plug wire
- problem and the larger spark plug gaps were enough to cause the
- misfire and subsequent backfire under heavy throttle.
-
- So, my recommendations for spark plug wires:
-
- * If you're cheap, buy "no-name" wires and replace them every year or
- so.
- * If you're a car nut, buy good magnetic-suppression type wires (e.g.
- MSD, Mallory, Moroso, Jacobs, etc.) and replace them every 3-4 years.
- * Always use silicone dielectric grease when installing plugs or
- wires to prevent moisture-induced misfires. It's cheap, and a $2 tube
- is enough to last several years.
- * DO NOT buy Autolite PowerSeal wires!!
-
- -- Chuck Fry Chucko@charon.arc.nasa.gov
- Amateur Taurus repairman
-