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Author Topic: bad idle  (Read 12038 times)

ClodKing

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bad idle
« on: May 23, 2008, 07:24:38 PM »
So my car idled badly before, and decided to do the coolant/vacuum line cleanup dealy. I got it all back together again today, and the idle imporved, but now I can barely get the engine to rev past 3000 rpm...

And it still wants to die if you rev it up and take your foot off the gas.

And I don't know if it made a ticking sound before but it does now....


What the hell???

Any help would be great.
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strad

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bad idle
« Reply #1 on: May 23, 2008, 10:06:44 PM »
As for ticking, make sure all your spark plugs are tight.  
Dunno for sure on the other issue.  I'd check fuel pressure though -- should be 3 bar.
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ClodKing

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bad idle
« Reply #2 on: May 24, 2008, 10:57:21 AM »
how would i go about doing that?


I'll check the spark plugs.
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ClodKing

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bad idle
« Reply #3 on: May 27, 2008, 06:47:08 PM »
Which way is the arrow supposed to point on that valve thing?? Towards the upper intake, or towards the rubber bellows portion of the air intake?

Also the engine shudders at 1200-1000 rpm when the throttle drop.

Any help would great. I would really like to have this car drivable by my birthday...
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vonkamp

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« Reply #4 on: May 27, 2008, 07:45:48 PM »
Could be an Intake manifold leak. Are the bolts tight? Did you replace the gasket?
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92 318i Cabrio

ClodKing

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« Reply #5 on: May 28, 2008, 05:04:55 PM »
I replaced both gaskets, but two nuts dropped between the cracks in my porch... So I have to find some place that has M7 nuts, and washers.

Could that be what my problem is??

All nuts are tight otherwise.
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colin86325

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bad idle
« Reply #6 on: May 28, 2008, 09:27:36 PM »
Yep, if you want your car to idle, then you need to eliminate vacuum leaks by reproducing the stock set-up.  That means replacing the shit that fell under your porch...
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ClodKing

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bad idle
« Reply #7 on: May 28, 2008, 10:02:55 PM »
Hahaha, yeah I know. I have been to a few places, and they only carry even number metric nuts (ie: 4,6,8,10,12,14). No M7's though. It really burns me up....

So I gotta contact a fasteners company. I know Fastenall a few towns over, but I don't have a car, and they close at 5, so I gotta co-ordinate it with a day off, or some other way...

Either way, it'll get done, I just gotta find a way to get the nuts home.
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vonkamp

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« Reply #8 on: May 29, 2008, 04:12:19 PM »
Hell, I got a Fastenall down the street from my house. If they have em I'll priority mail them to ya. Probably have by Monday.
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92 318i Cabrio

ClodKing

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bad idle
« Reply #9 on: May 29, 2008, 07:28:59 PM »
I'll see what I can get together. I think I can arrange something for a pick up on monday...

But yeah If I cannot get the nuts picked up, it would be really cool if you could do that for me. I'll let you know on monday. Thanks vonkamp.
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ClodKing

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« Reply #10 on: May 31, 2008, 02:30:53 PM »
So I got some 7mm nuts, and washers from a mechanic that works on my step dads mercedes.

I'll post up the results after I put them on tomorrow night (when I get back home).
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ClodKing

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« Reply #11 on: June 01, 2008, 08:12:50 PM »
Okay so the two nuts, and washers were just installed, and it didn't change the idle at all....

So I did pumping of the pedal, and got a 1222. I tried to find a reliable source for the diagnostic codes, and found one saying that it meant "oxygen sensor regulation". Is that correct?

And if so what could be done to correct that problem.

Oh, and does the car put itself into "limp mode" if it has no brakes. I am in the process of replacing all brake lines, and the back end has no lines, or calipers, or pads... But that never came through as a fault code...

I don't even think these cars have a "limp mode"....

I hope some of the M42 maniacs can give me a hand, because am literally at your mercy:(:D
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Cobra Jet

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bad idle
« Reply #12 on: June 02, 2008, 08:05:29 AM »
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vonkamp

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« Reply #13 on: June 02, 2008, 09:32:26 AM »
If I were you, I would finish your brake job before tackling the idle. Sounds like you are trying to run the car on jackstands which is not very safe.

You have the same code I had and what fixed mine was sealing all the vacuum leaks... I would bet that will fix your problem. Keep us posted
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92 318i Cabrio

ClodKing

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bad idle
« Reply #14 on: June 02, 2008, 03:38:31 PM »
The car is on it's tires. I can't leave it on jack stands because my driveway is gravel, uneven, and sloped. I can only jack it up in the lot behind my house, but cannot leave it there because it public property.

I geuss I should do the brake lines before I tackle the motor... But I have to drive the car to the back lot (it's a 3 second drive), and would like to get it running reliably for that particular task.

What part is the ICV? I think it's the part nearest the firewall that I had to splice a vacuum line for, but I am not 100% sure...
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