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I've been having an elusive problem with my car. The symptoms are as follows:
1. Cold start, the car idles like this --------v------v----v--------v--------
with "-" means smooth, and a "v" means a dip
dipping every 5-8 seconds or so until she gets warm.
2. Once the car is warm it doesn't display the problem
3. IF i disconnect the MAF it works without issue.
What Ii've done so far:
1. Cleaned maf
2. Try another maf
Both giving me same issues
Now, I was gonna try a third maf but the guy suggested it could be my Coolant Temperature sensor. Saying when my MAF is disconnected it forces the ecu into a different mode. Sounds like it makes sense.
My question tonight is this.
Instead of hunting down a coolant sensor to borrow, could I set values in the CT sensor scaling table that tricks the ECu to believe it's running
at warmed up temp and see if that diagnoses the CT sensor as the problem? I wouldn't drive on this, just a cold start
I'm thinking if i start the car fine tomorrow and it runs smooth then that would diagnose it?
OF course, I wouldn't be crazy enough to try this without consulting u guys