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Old 02-25-2009, 05:53 PM   #1
TIMSPEED
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Default New Saturn: OBD Code P0507 ??

So I got the code reader on my 97 SL2 and it showed a P0507...
Now, this has only been since I changed the thermostat yesterday...I'm thinking perhaps because it's finally running at the correct temp, a vacuum leak has shown up somewhere...
I'll replace the tubing for the PCV (PCV is brand new from Saturn), as well as the little tube that runs from the Valve Cover to the Air Intake.
Any other ideas?

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Old 02-25-2009, 06:53 PM   #2
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Default Re: New Saturn: OBD Code P0507 ??

po507 is Idle Control System RPM High


check your IACV=(idle air control valve)

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Old 02-25-2009, 07:01 PM   #3
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Default Re: New Saturn: OBD Code P0507 ??

Quote:
Originally Posted by saturncrzy View Post
po507 is Idle Control System RPM High


check your IACV=(idle air control valve)
My IACV is clear/clean. I took the Throttle Body off the other day and gave it a good cleaning. This has only started happening since yesterday.
I'm thinking, while I was changing the thermostat, I may have bumped the PCV tubing or something, to cause an intermitten vacuum leak.
It only does it when it's fully warm though. Because after I changed the thermostat, I let it run for about 10 minutes in the driveway, to check for leaks, then like after 10 minutes, just out of the blue, the idle jumped up to 1500rpm and sat there.
This happened again after driving it to dinner last night, when we came back home and pulled in the driveway...

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Old 02-25-2009, 07:05 PM   #4
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Default Re: New Saturn: OBD Code P0507 ??

i would check your ECTS. as this could be a cause of your idle being high the ECTS is the hart of these engines. How did you determin that you have a vacumm leak?

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Old 02-25-2009, 07:23 PM   #5
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Default Re: New Saturn: OBD Code P0507 ??

Quote:
Originally Posted by saturncrzy View Post
i would check your ECTS. as this could be a cause of your idle being high the ECTS is the hart of these engines. How did you determin that you have a vacumm leak?
I should probably link the other thread...
New Parts include:
Plugs, Wires, ECTS/Harness, Thermostat, PCV Valve, Cleaned Throttle Body, Air Filter, Oil/Filter, Trans Fluid/Filter, CPS, Upper/Lower Engine Mounts.

Basically, every part that is a wear item, was replaced.

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Old 02-27-2009, 06:05 AM   #6
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Default Re: New Saturn: OBD Code P0507 ??

One obvious question is what is the idle speed? I'll also add did you screw with the idle adjustment screw? You aren't supposed to mess with that.

Lastly, if you suspect a vacuum leak, spray some carb or brake cleaner around the manifold and hoses with the engine running. If you hear a change in idle, you've found it. Given what you've done, it might be the throttle body gasket.

...
There is nothing more frightening than ignorance in action.

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Old 02-27-2009, 10:36 AM   #7
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Default Re: New Saturn: OBD Code P0507 ??

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Originally Posted by BarnOwl View Post
Given what you've done, it might be the throttle body gasket.
Damn good guess...that was it!

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