One of the number one failures of modern transmission comes from torque report problems, and most often than others, from the engine not knowing it should be at a certain load. When I get a vehicle in for a tune to fix flair shifts and try to save the trans, the first thing I do is check the maf. Many times if you catch it as soon as you notice the flair or slip, it can fix the problem and report the proper torque to the trans to apply the proper shift and pre-fill/exit pressures.
A heads up for y'all.
- Thread starter hagar
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
maf = Mass Airflow Sensor in this case? If so, is there any action we should take in the short term to help prevent problems?
Thank you for the heads-up!
Yep, i would pop the mass air flow out once a year and give it a shot of electronic cleaner. Such a random post, but I had two high mileage 6 speeds come in this week with the same issue. Obviously won't fix all of them, but something to keep in mind.
THANK YOU!!!
Side question: Anything I should look for with HP Tuners to check the health of the MAF?
Yes, in your case since you are active with it, watch for your fuel trims starting to drift positive.
At hot idle the MAF reading in g/sec should be very close to the engine displacement in liters. If it's much different from that, either way, it's time to take a look at the MAF and how well the air intake is sealed.
Last edited:
when I cleaned my maf, I could see in the logs that I was in a different part of the Dynamic airflow vs rpm map under the same condition. in my case I was logging timing. it moved me higher in the map where it actually ran less timing for the same "load". dynamic airflow bring a blend of maf and map values. they say about 95% of it is map, especially steady state throttle.
I could definitely see the tcm using lower dynamic airflow numbers than it should messing with tranny shift times and pressures.
I could definitely see the tcm using lower dynamic airflow numbers than it should messing with tranny shift times and pressures.
I can only assume that, depending on the conditions the vehicle is driven in, cleaning every 3-6 months would not be too much, correct?
No such thing as too often, just gets worse and worse over time. More often would not be a bad idea.
Similar threads
