I have been data-logging my VF SC 540 just to find out what is going on since the kit was installed.
Bank 1 LTFT are nearly always higher than Bank 2 LTFT, with Bank 1 usually sitting at 17% and Bank 2 around 10-14%. Is Bank 1 on the left hand side facing the towards the engine?
I am not sure if this is indicative of a vacuum leak on Bank 1, perhaps the intake manifold isnt on as tight as it should be? What are you other SC guys getting as far as fuel trim figures?
Idle isn't great and every 3rd start seems to stumble into life. Just replaced the MAF and will look at the FPR/Filter next as I might have a problem with fuel pressure. My mechanics have blamed the VF tune for the problems but I am starting to suspect they have made a mistake somewhere (and wont admit it). I get no error codes or CEL but sent some logs that I had to Steve at VF and heard nothing back......they dont seem to be that helpful.
Also, had the charge pipe/snorkel pop off during one of the WOT datalog runs and caused all types of grief.
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Cant seem to be able to upload .csv so here is a screenshot of a WOT attempt.
Bank 1 LTFT are nearly always higher than Bank 2 LTFT, with Bank 1 usually sitting at 17% and Bank 2 around 10-14%. Is Bank 1 on the left hand side facing the towards the engine?
I am not sure if this is indicative of a vacuum leak on Bank 1, perhaps the intake manifold isnt on as tight as it should be? What are you other SC guys getting as far as fuel trim figures?
Idle isn't great and every 3rd start seems to stumble into life. Just replaced the MAF and will look at the FPR/Filter next as I might have a problem with fuel pressure. My mechanics have blamed the VF tune for the problems but I am starting to suspect they have made a mistake somewhere (and wont admit it). I get no error codes or CEL but sent some logs that I had to Steve at VF and heard nothing back......they dont seem to be that helpful.
Also, had the charge pipe/snorkel pop off during one of the WOT datalog runs and caused all types of grief.
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Fuel Trims
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