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Old Dec 12, 2010 | 10:41 PM
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Default Wanting to stall...

So everyone in a while when I am backing out of the garage and the rpms drop to about 3 or 400 while letting the clutch out I will push the clutch back in so it doesnt stall and they will go back to about 1300 then they will go back to about 300 and it will surge for a little while like it is about to stall out. It will do this for about 20 seconds then resume normal idle, is there anything to explain this or is it common?
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Old Dec 12, 2010 | 11:02 PM
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random thought, check your pvc valve. my idle rpm's drop when it gets clogged up. $2 fix to replace.
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Old Dec 12, 2010 | 11:04 PM
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Originally Posted by LTD
random thought, check your pvc valve. my idle rpm's drop when it gets clogged up. $2 fix to replace.
Well if its what I think it is the rubber hose has a tear in it... but I would have thought I would have a vacuum leak if that was my pcv valve.
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Old Dec 13, 2010 | 01:36 AM
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Do you have an CAI with an oiled filter? I have heard that the oil from the filter will eventually gunk up your MAF and cause issues like this. Might want to take it out and clean it.
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Old Dec 13, 2010 | 07:27 AM
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Originally Posted by Gradient
Do you have an CAI with an oiled filter? I have heard that the oil from the filter will eventually gunk up your MAF and cause issues like this. Might want to take it out and clean it.
Nope its a paper one, and it only happens when I go to take off and bring the revs down to about 400 cause I dont really use the throttle at all backing out of the garage.
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Old Dec 13, 2010 | 09:02 AM
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I agree with the PCV valve and or its connection tube at the intake. Also look at the air-bridge and insure that no unmetered air is getting past the MAF. Lots of times, we've heard of it coming up on the bottom edge of the bridge and its not easy to spot. Back to the PCV valve, I've had this happen personally where the connection tube looking fine but in fact, had a major hole on the bottom of it, out of sight and it was causing similar issues. Lastly, there is a procedure for "Idle Relearn" and it probably needs to be done. Use the search in here and you'll easily find it.
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Old Dec 13, 2010 | 09:48 AM
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Well its not like it happens all the time maybe once every one or two months and it only happens if I let the revs drop to about 400 while letting the clutch out which is why I cant see it being a vacuum leak or un metered air because that would cause a rough idle 100% of the time. Right?
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Old Dec 13, 2010 | 09:53 AM
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Originally Posted by m6 c5
Well its not like it happens all the time maybe once every one or two months and it only happens if I let the revs drop to about 400 while letting the clutch out which is why I cant see it being a vacuum leak or un metered air because that would cause a rough idle 100% of the time. Right?
Considering the suggestions given are soo easy to check, wouldn't it be worth your time, to do a physical inspection.....instead of trying to find reasons why it can't be the problem?
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Old Dec 13, 2010 | 04:39 PM
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Originally Posted by m6 c5
I dont really use the throttle at all backing out of the garage.
Drive the car man!

And use the throttle

Assuming that this car is not driven often, or when it is, that it is driven gently, and assuming that this is a recent issue, and assuming that the check engine light is not on, then I would suggest spraying some cleaner into the throttle body to clean the blade and bore of the TB.

If everything else works fine with the car and this is a recent issue, or has been getting worse, it is probably just some oil/funk build-up in the TB. This would be due to the PCV system and the oil vapor that is allowed into the TB.

BUT, it could be several different issues causing your condition, most revolving around old, worn, or dirty sensors.

Seriously though, just give it a lil gas
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Old Dec 13, 2010 | 08:30 PM
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Originally Posted by lucky131969
Considering the suggestions given are soo easy to check, wouldn't it be worth your time, to do a physical inspection.....instead of trying to find reasons why it can't be the problem?
Well I know that one hose is cracked and I havent had time to check the MAF yet plus its in the 20's and snowing today
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Old Dec 13, 2010 | 08:33 PM
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Originally Posted by manley845
Drive the car man!

And use the throttle

Assuming that this car is not driven often, or when it is, that it is driven gently, and assuming that this is a recent issue, and assuming that the check engine light is not on, then I would suggest spraying some cleaner into the throttle body to clean the blade and bore of the TB.

If everything else works fine with the car and this is a recent issue, or has been getting worse, it is probably just some oil/funk build-up in the TB. This would be due to the PCV system and the oil vapor that is allowed into the TB.

BUT, it could be several different issues causing your condition, most revolving around old, worn, or dirty sensors.

Seriously though, just give it a lil gas
Yea Im just thinking that when I let the rpm's get that low its messing up the air/fuel ratio and causing it to surge .
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Old Dec 13, 2010 | 08:48 PM
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Originally Posted by m6 c5
Yea Im just thinking that when I let the rpm's get that low its messing up the air/fuel ratio and causing it to surge .
Sounds like that's the case. Doesn't really sound like you have a real issue.

How long have you had the car? Has it always done this?

Does it have issues when it is just idling?

What happens when you 'blip' the throttle? Does it restore to idle nicely, drop below idle, or stumble?
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Old Dec 13, 2010 | 09:40 PM
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Originally Posted by manley845
Sounds like that's the case. Doesn't really sound like you have a real issue.

How long have you had the car? Has it always done this?

Does it have issues when it is just idling?

What happens when you 'blip' the throttle? Does it restore to idle nicely, drop below idle, or stumble?
It is going on a year since I got it but I didnt start driving it till this past summer, but it has always done this when the rpms drop really low.
It doesnt have any other problems other than having to add a few ounces of power steering fluid every couple of weeks.
And the only thing that will cure the surging is to wait it out for about 10 seconds or hold it at about 2 grand for a few seconds.
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Old Dec 13, 2010 | 10:00 PM
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Originally Posted by m6 c5
It is going on a year since I got it but I didnt start driving it till this past summer, but it has always done this when the rpms drop really low.
It doesnt have any other problems other than having to add a few ounces of power steering fluid every couple of weeks.
And the only thing that will cure the surging is to wait it out for about 10 seconds or hold it at about 2 grand for a few seconds.
RXP fuel system cleaner, drive the **** outta it. And maybe change the plugs and fuel filter for good measure.
It just needs to be driven. I really bet that if you put some fuel system cleaner in it and really run the snot out of it, it will run better. And by run the snot outta it, I mean to stay away from O/D gears and hit redline several times, zip down the highway in 3rd or 4th gear for a stretch, let that engine breath a bit.

It just needs to be driven.

p.s. I am not suggesting to do anything foolish with your car like sit in the driveway and floor it and let it bang against the rev limiter. Just get out and drive that thing, drive it the way it was meant to be driven.
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Old Dec 13, 2010 | 10:02 PM
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Originally Posted by manley845
RXP fuel system cleaner, drive the **** outta it. And maybe change the plugs and fuel filter for good measure.
It just needs to be driven. I really bet that if you put some fuel system cleaner in it and really run the snot out of it, it will run better. And by run the snot outta it, I mean to stay away from O/D gears and hit redline several times, zip down the highway in 3rd or 4th gear for a stretch, let that engine breath a bit.

It just needs to be driven.

p.s. I am not suggesting to do anything foolish with your car like sit in the driveway and floor it and let it bang against the rev limiter. Just get out and drive that thing, drive it the way it was meant to be driven.
Its my DD so it gets driven and driven hard most of the time, had them loudmouths screaming at the top of 3rd the other night
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Old Dec 13, 2010 | 10:13 PM
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Originally Posted by m6 c5
Its my DD so it gets driven and driven hard most of the time, had them loudmouths screaming at the top of 3rd the other night
Ahhh, good man then
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