I did the MAF test and got 140 L/H. However, my car does have 96k miles on it. There is nothing wrong with the car. It doesn't even burn oil. (It will probably start to now that I've said it doesn't). The MAFs are original, so should I change them? If I did, I would probably replace the CPSs, oil seperators, spark plugs, and O2 sensors together.
Strong M5 ! 140 L/Hr indicates all systems and mafs are good: 120 L/Hr means that some systems are bad and mafs are good OR bad mafs and systems are bad OR bad mafs... I would leave MAFS alone for the moment. Were they corrected figures at WOT, 3rd gear at redline ?
Maybe have a look at the suspension/steering components instead : thrust arm bushes, control arms, tie rods, sway bar bushes, rear ball joints, rear wishbones etc etc
1st gear WOT at 7000rpms. Adjusted, I think I'm at 138-139 L/H. Suspension is actually in pretty good shape, but I'm going to replace it with a coilover system sometime next spring/summer.
1st gear WOT at 7000rpms. Adjusted, I think I'm at 138-139 L/H. Suspension is actually in pretty good shape, but I'm going to replace it with a coilover system sometime next spring/summer.
I would strongly recommend 3rd gear WOT and hit the rev limiter....check your mirrors for police before you try this though !! Ask me how I know !
1st gear is going to, I suspect, a wildly erratic figure.
I would strongly recommend 3rd gear WOT and hit the rev limiter....check your mirrors for police before you try this though !! Ask me how I know !
1st gear is going to, I suspect, a wildly erratic figure.
Please do tell how you know! With 1st gear I looked in the 6000-6500 range and it was around 125L/H. I looked again right before the throttle cut off and I saw 140. I think I'm going to try with 2nd gear today. The problem with 3rd gear WOT is that the highway I drive on regularly always has police.
If your car pulls evenly from 2000 to 7000 RPM and you see 140 L/Hr then there is no reason to replace the MAFs. Of course, they may suddenly go bad without any warning and in some cases the car will then run very poorly. Should that happen you can simply disconnect them and drive without MAFs until you get the new ones. By the way, that is another way to verify if you have MAF problems. If the car drives better without them, they are shut! You don't even need to try that!
With 1st gear I looked in the 6000-6500 range and it was around 125L/H. I looked again right before the throttle cut off and I saw 140. I think I'm going to try with 2nd gear today. The problem with 3rd gear WOT is that the highway I drive on regularly always has police.
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