Question about 1992 Saturn SL

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Rpm sticks at 1200 to 1500 and mechanics told me I have some damaged tubes that run from the air intake to the crankcase for vacuum sensing related to the emission control system? Also the car will no longer shift into 4th gear (overdrive) and the two problems present at the same time! Thanks!

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Your central problem is that the car is almost 20. therefore almost any repair will exceed the value of the car. as you know you have some "damaged tubes", the cheap way would be locate another old saturn in a junkyard, craigslist or eBay and get undamaged tubes from that one and put them on your car. i think such tubes would match from about any saturn through 95 which has an automatic transmission though you should stick to the same type of engine, be it SOHC SL1 or DOHC SL2. you can buy a repair manual for less than 10 bucks on eBay to help you in disassembly. if your "tubes" are rubber hoses, these are sold in various diameters and any length at all auto parts stores.

Posted on Feb 04, 2011

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Posted on Jan 02, 2017

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How to fix a dtc p0507?


A vacuum leak Leaking air intake after the throttle body EGR valve leaking vacuum A faulty positive crankcase ventilation (PCV) valve Damaged/failed/dirty throttle body Failed EVAP system Failed IAC (idle air controller) or faulty IAC circuit

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What does code p0507 mean??


idle air control [iac] system rpm higher than expected--causes a vacuum leak --leaking air intake after throttle body ---egr valve vacuum leak--damaged/failed/dirty throttle body---a faulty positive crankcase ventilation valve [pcv]----faulty/damaged evap system---failed/faulty [iac] idle air controller //circuit

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When i start my car it starts, until about 30 seconds later when the RPM's go from 1-0 and the car shuts off. Its very jumpy when its running. i have replaced the fuel pump, just had it aligned, bout a...


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My monte carlo has code p0507 what is it and how can i fix it


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- Dirty throttle body
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solution !!!
If there are no intake leaks, clean throttle body, adjust engine idle and erase engine code. If the code comes back you may have to replaced the Electric Throttle Control Actuator (Motor) to repair the problem.

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1983 Blazer with 6.2L diesel. 132k I have had muffler shop check for exhaust leak and found none. The only item to be leaking anything is the CDR. It is emitting a small amount of vapor from a small...


According to Chilton's manual on page 159 under "Diesel Engine Emissions Controls" A Crankcase Depression Regulator Valve (CDRV) is used to regulate (meter) the flow of crankcase gases back into the engine to be burned. The CDRV is designed to limit vacuum in the crankcase as the gases are drawn from the valve covers through the CDRV and into the intake manifold.

Fresh air enters the engine through the combination filter, check valve, and oil fill cap. The fresh air mixes with blow-by gases and enters both valve covers. The gases pass through a filter installed on the valve covers and are drawn into the connecting tubing.
Intake manifold vacuum acts against a spring loaded diaphragm to control the flow of crankcase gases. Higher intake vacuum levels pull the diaphragm closer to the top of the the outlet tube. This reduces the amount of gases being drawn from the crankcase and decreases the vacuum level in the crankcase. As the intake vacuum decreases, the spring pushes the diaphragm away from the top of the outlet tube allowing more gases to flow to the intake manifold. NOTE: Do not allow any solvent to come in contact with the diaphragm of the CDRV because the diaphragm will fail.
It sounds like your CDR valve has been compromised. Time for a new one or at least a functioning used one.

Credit to - 82Chev @ http://www.dieselplace.com/forum/63-gm-diesel-engines/20-6-2l-diesel-engine/444625-cdr-valve-question.html

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P1343. Misfire Cylinder 1 with Fuel Cut-off.
I would start looking at the air intake for leaks first. Make sure the intake boot isn't torn anywhere, inspect it throroughly around all grooves for cracks.

Also check the crankcase for excessive vacuum by removing the oil cap with it running, listen for idle speed change, and excessive vacuum entering with the cap off.

This would indicate the crankcase vent valve has failed under the intake.

It can be replaced without removing the intake, it's kind of a pain. You will need the valve and the attaching hoses since they will need to be broken to remove the valve, and they get brittle with age.

The valve is located under the intake, slightly forward of the throttle body. I wouldn't try do do it unless you're really mechanically inclined, its kind of tough.
The part # for the valve is 11617501566.

Then the hose part #s are:
11611432559
11157532649
11617504535
11617504536


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I hope helps.

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06 chevy trailblazer idle control system RPM lower than expected


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Possible Solutions:
This DTC is more of an informational code, so if there are any other codes set, diagnose them first. If there are no other codes, inspect for vacuum leaks, restrictions, and damage. If there are no symptoms other than the DTC itself, just clear the code and see whether it returns.

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