Quick question about timing

[16G AWD]

Ok here's my question. when i do a cold start on my car, it idles fine for like 30 seconds then it starts to idle rough. I checked my timing marks at the 3 and 9 o'clock positions and they look to be just off by a tooth but i'm not sure. So if your timing is off by a tooth would'nt it idle rough from the start or does this sound like sensor issues because it is fine for the first 30 seconds? By the way it was idling horrible until I took off the throttle body and cleaned it. Now like I said it does it 30 seconds after I start it up.

 

[cruisintalonawd]

maybe your gasket didn't seal properly

 

[16G AWD]

The funny thing is that the idle was worse prior to me cleaning the throttle body.

 

[ndsti]

Do a boost leak check, you might be pulling in air from somewhere. Check your ISC.

 

[16G AWD]

Is there a way to check your isc with a multimeter or is that what you were talking about?

 

[Mr Peepers]

What is the rpm right after you start it, and what is it 30 seconds after?

Higher rpm may hide the roughness.

 

[P2ych0t1c]

Wouldnt idle go up if the gasket didnt seal properly for the fact that the air is just rushin in.....If your timing was off by a tooth i dont think the car would even start

 

[snowborder714]

Is there a way to check your isc with a multimeter or is that what you were talking about?

Here's how to test your ISC.
http://www.dsmtuners.com/forums/newbie-forum/273307-idle-speed-control.html#post151306992

 

[cruisintalonawd]

well if too much air goes in then it would bog down because there isn't enough fuel to go in with it

 

[16G AWD]

Well I adjustaed the biss and when i start it up its at like 1300 but after 30 seconds its moving slowly between 1300 and 900.

 

[16G AWD]

I dont think i'm using this right because it gives me a reading then goes to zero

 

[cruisintalonawd]

what are you using????

 

[16G AWD]

I believe it's an ohm meter. all the knobs settings have the ohm sign on them. When you change the settings it moves the decimal point over.

 

[cruisintalonawd]

Ok I see are you trying to test the tps

 

[16G AWD]

No the isc.

 

[ndsti]

Make sure that you are connecting the test leads to the right spot on the muiltmeter. One leads goes into the comm and the other goes into the ohm or voltage spot.

On another note I fixed my idle surge but rebuilding my TB replacing the BISS and all gaskets.

 

[16G AWD]

right on