1997 Manual Saturn SL1 Idle problem 140k miles

Tiny
RCROCKET
  • MEMBER
  • 1997 SATURN
Hi thanks for helping in advance!
I have 1997 SL1 Idle problem that started last night, I was teaching my wife to dive my Saturn wich is a manual, in doing that she made a few really hard stops and killing the motor. Now when I drive it the engine has a high idle, I do know that saturns take a little time to come down in rpm but this is really abnormal. If for example I'm driving down the road in 3rd or 4th gear at 2200 rpm and I either take it out of gear or push the clutch in (with my foot off the gas pedal), the engine will rev to like 3k rpm it raises in rpm and stays there for a like 5-10 secs and then slowly goes down a little, if I'm coming to a stop it will eventuall settle down to the normal 8-900 rpm at idle but it takes it about 20-30 secs, it never used to do this, it usually took a few secs to get to idle but never like this. And it never increased in rpm when pushing the clutch in with my foot off gas. If I have the engine parked and running at idle and I rev the engine up it immediatly goes back down to idle like it should, its only when I start to let the clutch out or in gear and driving that it starts to react this way, the motor wants to rev higher for some reason. ANy help is appreeciated. I checked for engine codes and there are none.
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Saturday, November 17th, 2007 AT 10:15 AM

8 Replies

Tiny
MERLIN2021
  • EXPERT
The PCM may have started to learn your wife's driving pattern. But you can check the EGR, and the Idle air controll, it's on the side of the throttle body.
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Saturday, November 17th, 2007 AT 11:22 AM
Tiny
RCROCKET
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What do I look for when I check the egr and the idle air controll? Should I look for anything specific? Or how do I know if there malfunctioning? If it is the PCM how do I clear it? Would taking the negative battery cable off for a few minutes do it? Thanks.
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Saturday, November 17th, 2007 AT 11:55 AM
Tiny
MERLIN2021
  • EXPERT
If you had no problem until the driving lesson, yes clear the computer, remove the fuse marked ECM for 10 seconds.
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Saturday, November 17th, 2007 AT 12:14 PM
Tiny
RCROCKET
  • MEMBER
I went out and removed the positve and negative from the batery for at least 5 minutes, I'm assuming that removing the fuse and removing the battery power will do the samething. After that I took it on a test drive and it is still doing the samething, I checked the comptuer codes again and there was nothing in the computer. Any other ideas?I removed the EGR valve, I replaced it about 6 months ago, it seemed fine, it rattled like it should and was somewhat clean.

Before lastnight it was running fine, last night was when I was trying to teach her how to drive it. It started right after I started driving after her last night
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Saturday, November 17th, 2007 AT 12:53 PM
Tiny
MERLIN2021
  • EXPERT
No what you actually removed was the PCV! They are chrome colored, and rattle, EGR's have a big vacuum diaphram attached to them. Pull uot your plugs and see what condition there in. Check your fuel rail pressure regulator, pull the vacuum hose off, if there is any gas in it, replace it. What happens to the idle when you pull the vac hose?
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Saturday, November 17th, 2007 AT 1:07 PM
Tiny
RCROCKET
  • MEMBER
The plugs are in good condition, replaced them a while back. When the motor was running and I disconnect the PCV hose the engine starts sucking air and raises rpm about 1500 or 2k. Where is the fule pressure regulator and where does the vacum hose go to? Did you mean to pull the vac hose off the fuel pressure reg and see how it runs?
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Saturday, November 17th, 2007 AT 2:44 PM
Tiny
MERLIN2021
  • EXPERT
Yes but first see if any gas is in the line or leaks out b4 you start it.
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Saturday, November 17th, 2007 AT 2:48 PM
Tiny
RCROCKET
  • MEMBER
I'm not exactly sure where the hose is that you want me to check, can you tell me where I would find it, is it by the fuel injector rail?
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Sunday, November 18th, 2007 AT 1:01 PM

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