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SVTPerformance's Chain of Restaurants
Tuning À la carte
Idle tuning help Vortech SC / Comp Cams XE270
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<blockquote data-quote="Bullitt5566" data-source="post: 15212640" data-attributes="member: 119066"><p>Yes, sounds like the problem is with the MAF. I swapped the mAF out for a different one of the same model. Same result.</p><p>I also removed the filter and tried different MAF orientations. Same result.</p><p>I tried loading the SCT provided MAF transfer function for the 90MM LMAF, car would not idle at all. Put the tuner provided MTF back. </p><p>I datalogged the actual load and compared it to the load with failed MAF. The actual load is about 50% higher than the Failed MAF load.</p><p>Increased the engine displacement by 10% to bring the load down. No change.</p><p>I think I'm going to start a new tune with the MAF transfer provided for the 90MM MAF and ditch the tuner provided MTF. It's a Ford 90mm Lightning MAF so the MAF tranfer function is well known. I don't know why the tuners MTF would be so different.</p></blockquote><p></p>
[QUOTE="Bullitt5566, post: 15212640, member: 119066"] Yes, sounds like the problem is with the MAF. I swapped the mAF out for a different one of the same model. Same result. I also removed the filter and tried different MAF orientations. Same result. I tried loading the SCT provided MAF transfer function for the 90MM LMAF, car would not idle at all. Put the tuner provided MTF back. I datalogged the actual load and compared it to the load with failed MAF. The actual load is about 50% higher than the Failed MAF load. Increased the engine displacement by 10% to bring the load down. No change. I think I'm going to start a new tune with the MAF transfer provided for the 90MM MAF and ditch the tuner provided MTF. It's a Ford 90mm Lightning MAF so the MAF tranfer function is well known. I don't know why the tuners MTF would be so different. [/QUOTE]
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SVTPerformance's Chain of Restaurants
Tuning À la carte
Idle tuning help Vortech SC / Comp Cams XE270
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