Intermittent low idle & stall - No codes from OBD-II

[Tom M.]

I have an intermittent problem with a low idle approx 500 & less. The truck will then stall. Always starts right up. My obd-ii is not showing any codes. The truck has had the 90k w/ new filters, fi was also cleaned. Any ideas on what is causing this? It was doing this before and after the service, so its obviously not related.

 

[Blee1099]

I have an intermittent problem with a low idle approx 500 & less. The truck will then stall. Always starts right up. My obd-ii is not showing any codes. The truck has had the 90k w/ new filters, fi was also cleaned. Any ideas on what is causing this? It was doing this before and after the service, so its obviously not related.

Have you tried cleaning the MAF & IAC sensors? See if that helps any bit. Also reduce your signature down to 6 lines or less.

 

[Tom M.]

I cleaned the IAC and there was no improvement. I may just replace it, but with no codes, I am hard pressed to think that sensor is bad. The MAF is clean.

 

[BuffaloXplorer]

Not sure what it (iac) should read, but most sensors can be electrically tested. Pick up a haynes manual or do some searching here at EF. You should be able to find what voltage it should be at idle. That way you'd know, electrically, if a unit is bad before you buy a new one.