cold start issue

[87Turbolimited]

Hey Fellas as I cold start my car its idles low an high for a bit then goes to regular has any, of you had this isssue or no what can cause this maybe a sensor?

 

[mikestertwo]

Vacuum leak, misadjusted IAC, bad O2 sensor.

 

[87Turbolimited]

can i check if any of these can be the issue thru the scanmaster?

 

[theCATman]

The IAC reading on your Scanmaster won't really be useful at cold start, but at hot idle it should read in the 10-40 range. The o2 at cold start will also be all over the place until the sensor gets heated up enough to stablize. But it should be in the 600-800 range

 

[mikestertwo]

can i check if any of these can be the issue thru the scanmaster?

If your IAC count is at "0" or going back and forth from "0" to some number that may be an indication of a misadjusted IAC or a leak somewhere. Check your crosscounts on the O2 sensor after the engine goes into closed loop and see if they are counting up. If they are not or they are going up very slowly you may have a bad O2 sensor.

 

[Ttype6]

Hey Fellas as I cold start my car its idles low an high for a bit then goes to regular has any, of you had this isssue or no what can cause this maybe a sensor?

Fuel pressure,vacuum leak. IAC and O2 sensor won't cause this.

 

[87Turbolimited]

The IAC reading on your Scanmaster won't really be useful at cold start, but at hot idle it should read in the 10-40 range. The o2 at cold start will also be all over the place until the sensor gets heated up enough to stablize. But it should be in the 600-800 range

ill ck tomorrow an post a vid of the scanmaster readings thxs

 

[87Turbolimited]

If your IAC count is at "0" or going back and forth from "0" to some number that may be an indication of a misadjusted IAC or a leak somewhere. Check your crosscounts on the O2 sensor after the engine goes into closed loop and see if they are counting up. If they are not or they are going up very slowly you may have a bad O2 sensor.

a lil lost here lol ill try it

 

[87Turbolimited]

Fuel pressure,vacuum leak. IAC and O2 sensor won't cause this.

if it;s not any of these then what can it be?

 

[Ttype6]

if it;s not any of these then what can it be?

It could be fuel pressure and/or vacuum leak. It's not IAC or O2.

 

[Eric Stage I]

Watch the BLM (bL on the scanmaster) during a cold start. See if it's going back and forth between two different numbers when the idle goes high and low. Let us know what those numbers are.
There may be too big of a difference between the BLM cells, which could indicate a vac leak, or MAF issue (or maybe it just needs a tweak on the Translator settings).
Eric