Signature 600 idle speed

[TerryB]

Got a 2000 International 9900ix with a Signature 600 that has a low idle of 500 rpm's. Programming is all factory specs. Took it to a local shop that has Cummins Insite. They tried to set the low idle to 725 and they say ECM would not accept the change. They are blaming the timing and metering valves as being the problem. Is that at all possible? No codes. Engine does idle like crap also but it runs and pulls great. I ran the overhead a few months ago thinking I could help the idle didn't help the idle nor did I really find anything out of adjustment on the overhead. Could timing and metering valves be overall problem?

[Rawze]

It is the programming in the ecm itself (and subsequently Insite software simply displaying what range is available) that allows the setting range ... not the hardware itself.

[TerryB]

So would the ECM need to be reprogrammed?

[Rawze]

(10-24-2024 )TerryB Wrote:  So would the ECM need to be reprogrammed?

enigne ser#?

what program is in the ecm when connecting with Insite.?.

maybe a screen shot of what your trying to set?.

will it let you set it to 700?.