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1996 Saturn SL1 3rd cylinder misfire

Tiny
STAUSHA
  • MEMBER
  • 1996 SATURN SL1
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 17,600 MILES
Sorry this is kind of long. I have a saturn that idles high when I stop. And I was told it was a 3rd cylinder misfire and I asked the man at autozone what could possibly be the problem, he told me it could be alot but spark plugs, spark wires, coils, and alot more. So Ii've replaced both coils and spark plugs and spark wires. And it still idles high. What could this possibly be? Also what could be the problem with my saturn if I have transmission fluid but my car jerks when in reverse and when driving for at 55mph or higher it jerks too. Is this my transmission going out? ( 96 saturn sl1, 176,000)
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Friday, October 8th, 2010 AT 4:15 PM

7 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
They sold you coil's plug's and wire's for a high idle?Also what code's do you have?The most common reason for a delay in reverse is a bad valve body. The most common reason for a high idle is a vacuum leak.
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Friday, October 8th, 2010 AT 4:20 PM
Tiny
STAUSHA
  • MEMBER
  • 6 POSTS
I don't currently have any codes. And could you explain a little more about bad valve body and vacuum leak. Also yes thats what the man told me at auto zone. And how much each could cost, also would the bad valve body be a reason it knocks when in reverse too.
Thanks.
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Friday, October 8th, 2010 AT 4:39 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Let's start with the high idle that could cause a bang into reverse.A vacuum is what is made while the engine is running on the intake side the most common place for your car to leak vacuum is that hose that goes from the intake manifold to the pcv inspect the hose for leak's or colapasing I have seen that cause high idle surging all kind's of stuff.
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Friday, October 8th, 2010 AT 5:36 PM
Tiny
STAUSHA
  • MEMBER
  • 6 POSTS
The valve body. Is that expensive?. And If I we're to have a leak in my oil ( which I think I do ) could it still be my vacuum?
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Friday, October 8th, 2010 AT 5:44 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
The valve body's are about 160 for a rebuilt one.A oil leak has nothing to do with a vacuum leak.
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Friday, October 8th, 2010 AT 5:51 PM
Tiny
STAUSHA
  • MEMBER
  • 6 POSTS
Hello again, When I look for parts. There are alot of valve things. I was wondering if its the Trans Valve Body Assembly. Or what would it be called in the inventory parts. Also for the vacuum can I have A specified name?
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Saturday, October 9th, 2010 AT 10:26 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
It's your whole valve body assembly but you still need to to run a pressure test on your transmission line pressure and air check your clutches and make sure there holding. When I say you may have a vacuum leak I was asking you to look for vacuum leaking and if you have a vacuum then you can replace a part.
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Saturday, October 9th, 2010 AT 11:49 PM

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