How many RPM's should my 94 SL2 1.9 litre idle at?

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- wrightprice1977
  
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posted
18 years ago

Sun, Oct 2, 2005 9:21 PM

It idles at about 700-800 rpm's right now and is really rough. Everything on my car is starting to rattle. What could possibly be making my car idle so rough? It does this if I am sitting still, in park, and while driving. I am also tripping the Service Enginge Soon lite after driving it for a little bit, but if I shut the car off for a few minutes and start it back up it will be off and it will take a bit for it to come back on. If anyone has any Ideas on what mite be wrong or what I can do to fix my car I would Appreciate the advice. Also, does anyone know about what it mite cost to replace the exaust from the flex pipe back and can I now do this without a cattlitic converter now that they are doing away with the E-check stations in Ohio?

Best regards, Jason

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- p_vouers
  
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posted
18 years ago

Mon, Oct 3, 2005 12:14 PM

You might want to go to autozone and have them read what the code number is that is turning the ses on. The idle speed is correct for our saturns but it does sound like you might have a sticky or bad egr valve but without the code number it is only a guess.

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- Lane
  
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posted
18 years ago

Tue, Oct 4, 2005 12:54 AM

PCV valve, EGR, plug wires, or even a collapsed torque axis motor mount. Take a close look at the mount. If you see any cracked rubber, I'll bet it's the culprit. It may not make your engine idle rough, but would transmit a lot more noise and vibration into the passenger compartment if it were bad.

You shouldn't guess and replace parts. If the SES light came on, there is a stored code. You should read it to see what's up. Luckily with 1st gen cars, you can do it with a paperclip.

Some excellent instructions can be found here:

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to Diagnostic Trouble Code Information, and Diagnostic Trouble CodeChart for 1st Gen Saturns. Or, people posting here have said you can stopby any Auto Zone and have them read the codes for no charge. Any Haynes or Chilton manual will give additional info on what each code means.

It's not worth becoming a polluter. You can get a generic converter from your local exhaust shop for under $100.

Lane [ lane (at) evilplastic.com ]