Last post on Sep 02, 2003 at 4:43 PM
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Oldsmobile Achieva, Electrical, Engine, Coupe
#19 of 27 Very interesting, and educational, too.
Sep 02, 2003 (3:38 am)
The hosts have been made aware of your cursing and otherwise rude behavior.
Sep 02, 2003 (6:06 am)
ts mentioned new spark plugs. Is she absolutely sure the plug wires were put back in the right sequence? I've seen new and moderately experienced mechanics overlook something that simple. It would cause the symptoms she is describing.
Hopefully by the time she sees this, the shop will have allready figured it out.
Sep 02, 2003 (8:02 am)
Message #19 relates to posts deleted for profanity.
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Sep 02, 2003 (8:04 am)
Actually mullins has a very good suggestion there!
Cross-wired or "cross-firing", with the spark jumping either from wire to wire or in the distributor.
This creates that same "timing problem", in that due to cross-firing or cross-wiring, a cylinder gets a spark before its "time" to have it. So that cylinder's valve is open, probably to permit exhaust gas to leave, and then a spark comes and ignites fuel when the valves aren't yet ready for that.
May I please add as an armchair mechanic, that pouring fuel into a running engine is REALLY dangerous?
#24 of 27 Spark Plugs?
Sep 02, 2003 (2:51 pm)
would it affect the car even after having been changed for 2 weeks. she was running great after he changed them. The firing order for our car was checked before putting them in. 1, 3, 4, 2.
Sep 02, 2003 (4:21 pm)
So how about cross-firing then. Did you say cap and wires were new or are they original?
Cross-firing----due to faulty cap or spark plug wires, the spark transfers or jumps from one wire to another adjacent, unintended wire.
#26 of 27 all of which would show up on the scope at the shop
Sep 02, 2003 (4:30 pm)
my first thought was timing, and bad timing caused by spark plug wires in the wrong place is also timing issues. but I gotta go with "see a professional" advice here.
even assuming the significant other was the architect of this engine, and assuming he had worked on them fifty times a day during initial test and qualification, it's obvious that something is bass-ackwards here. when I was programming and couldn't see what in heck I had done wrong, and had Thoroughly Convinced Myself I Was Invariably Right, I had to have somebody else find my sneakiest pilot errors.
part of growing up is knowing when you have to slap the table, say you don't have it today on this one, and call somebody over to look at your disaster.
it's time on this one, call Captain Hook and away you go for a second opinion from somebody with a new outlook and all the right equipment.
#27 of 27 Typically I do my own diagnostics and repairs....
Sep 02, 2003 (4:43 pm)
but in this situation, given the same circumstances and the same level of expertise and/or completness of the toolbox as what "ts" has, I'd have to side with swschrad. I'm about to tackle the injectors on my truck. You can bet that if I get into it and find myself over my head, I won't hesitate to call a tow truck.
With this car being a '96 model and being OBD-II, the first thing I'd do is hook up my scanner to see what turns up. I do know it will show a misfire and tell you which cylinder it is. Again, $60 or so could tell "ts" where to look and save her a ton of money.