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- From: pshyvers@pyrnova.mis.pyramid.com (Peter Shyvers)
- Newsgroups: rec.autos.tech
- Subject: Re: Run-on in old cars ( timing chain? )
- Message-ID: <182721@pyramid.pyramid.com>
- Date: 21 Jul 92 03:44:16 GMT
- Sender: news@pyramid.pyramid.com
- Reply-To: pshyvers@pyrnova.pyramid.com (Peter Shyvers)
- Organization: Pyramid Technology Corp., Mountain View, CA
- Lines: 21
- Originator: daemon@sword.eng.pyramid.com
-
- In article <1992Jul16.095017.8498@iccgcc.decnet.ab.com> principe@iccgcc.decnet.ab.com (Tony Principe) writes:
- >
- >When I had my old 72 Pontiac, I had to turn the key off while the car was in
- >gear in order to keep the engine from running. One time I happened to be
- >looking through the shop manual and noticed a chart that listed different
- >heat range spark plugs for different driving conditions. For some reason,
- >the car had come with hotter plugs than what was actually needed. And when-
- >ever I gave the car a tune up, I always replaced the plugs with the same
- >type that were there previously. Finally I switched to the next cooler plug
- >and never had a problem with run on after that. I don't know why the car had
- >hot plugs installed in the first place.
-
- Common problem. Sometimes the parts department or mechanic screwed up, or
- someone tried to get tricky to combat another problem. Sometimes the shop is
- out of the right plugs, and too stupid or cheap to order-in the right ones.
- It's easy in a rush to overlook or understate the effect of that tiny
- increase in the length of the portion inside the cylinder...
-
- We always had to document on the shop order the stock plugs, and why we
- made a substitution. People checked the book every time, and customers were
- asked if they had hotter plugs in place.
-