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04-30-2004, 05:50 PM
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#1 | ||||
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New Member
 Join Date: Apr 2004
Posts: 3
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'92 SL2 help needed
My 1992 SL2, for lack of a better word, bucks or surges when going a steady 28 to 30 mph. It runs fine at other speeds and does not act at all weird when accelerating at any speed. The problem only occurs at the above speeds (so far) and is actually occuring intermittently. Does any one have any idea what may be going on?
Thanks.
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04-30-2004, 08:17 PM
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Senior Member
Join Date: Feb 2000
Location: Saturn of Norwood, Ma
Posts: 1,467
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Best guess would be that the EGR valve is coming on too early or too much. The best way to check this is to disconnect the EGR valve. The valve is the gold "UFO" looking valve at the back of the engine. Just disconnect the vacuum hose from the top of it. If the problem goes away The valve is bad.
good luck ... ~ If it worked before you messed with it, it must be something you did ~
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04-30-2004, 08:48 PM
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#3 | ||||
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Super Member
 
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What he ^ said. I would only add to plug the end of the removed hose with a golf tee or similiar item.
... Old Saturns never die, people KILL them, so check your damn oil! "Unthinking respect for authority is the greatest enemy of truth." Albert Einstein
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05-01-2004, 07:11 PM
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#4 | ||||
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New Member
Join Date: Apr 2004
Posts: 3
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Well, you hit it right on the head. I unplugged the valve then plugged the hose with a nail and voila the bucking disappered!!
Thank you very much. Now the question is, do i fix it or leave it unplugged??
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05-01-2004, 08:57 PM
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#5 | ||||
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Senior Member
Join Date: Feb 2000
Location: Saturn of Norwood, Ma
Posts: 1,467
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The EGR valve is an emissin item used to lower oxides of nitrogen in the exhaust stream. Without it you may not pass emissions in your state. Another reason for the valve is to lessen or eliminate predetonation (engine ping). Engine ping has been described by some as equivilant to someone taking a large hammer and slamming the top of the pistons.
... ~ If it worked before you messed with it, it must be something you did ~
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