Quote:
Originally Posted by Sagz
Would you also leave Ingnition timing up a bit for the cold temp?
Is it normal that my Cruise Control also doesnt work anymore? Is it the P050B code diisabled that does that?
and is it safe for our cats since they dont heat up as much, got the second cat only
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The post start timing is heavily retarded in stock rune to burn the fuel very late in cycle to create higher exhaust temps to heat up the primary cat in header quickly. This is also what creates a lot of the noise on cold start.
The maf offset adds fuel like a choke on old cars, thats why their still some higher maf offset values at the very start of the wsrmup cycle at very cold temps, these should be suffient for cold starts.
Yes you will definitly need to disavle P050B on Ua and Canada tunes or you will thtow a cel code and cruise will be disabled and maybe other things. This code checks post start ignition timing