Who has installed a PRO-M mass flow sensor? - Page 2

wastintime · 02-12-2005, 12:18 PM

I leaned out the idle a bit before driving to the shop and it never surged again.

The bracket is made, making it wasn't bad, but installing it was a bit of a pain in the @ss. Also, one tab was bent the wrong way, but it's a little late to fix it. I think I'm going to but about a 20 degree bend in the bracket itself where it attached on the front of the intake and that will solve most of the problem.

I thought I'd post some pics of the final installation, sorry, none of the tuner becuase I haven't decided on it's final location yet.

Without the bracket:

here are two with the bracket... the engine's running, I was kind of hoping the fan would look a little cooler, oh well.

here's a close up on the bracket... it's 3mm aluminum painted satin black, some of which scraped during the installation and I'll touch it up later.

Thanks for all the input guys

wastintime · 02-15-2005, 06:13 PM

I've got a feeling I'm not tracking the car this weekend... the AFRs are all F'ed up... it's WAY too rich on throttle, and the idle is just screwy... the correct AFR makes it idle at about 1400RPMs and it surges and does weird things... oh well... I wanted a mass flow sensor...

Mr Beau · 02-16-2005, 12:56 AM

MAF's really don't like air filters near them because the air is easily disturbed, which "tricks" the sensor as to how much air is really being injested. This could be your problem.

Normal installations have a reasonable length of tubing before the sensor so the air is "straightened out" beforehand.

89911 · 02-16-2005, 04:39 AM

I installed my own MAF about 4 years ago. I ran it exclusively on the track with a custom chip. The electronics on our car isn't that much different. MAF's can be a PITA. Simply put. They really only function at one setting, wide open throttle. All other points along the curve can suffer. My setup was adjustable over 4 criteria, idle, mid, high, and acceleration response. All were interactive. I ran it until I had my engine rebuilt and had better luck with SteveW programming the chips with a stock intake set up. I still think they produce more power in a narrow band, but they are aftermarket and do not have the overall regulation like the stock motronic set up. I had trouble with my new engine (3.4 twin plugged)on the car always running too rich with the maf also. You have to go to a dyno with an A/F meter (dynojet), rent it for an hour or two, and set it up there. Everything else is just guessing.

wastintime · 02-16-2005, 06:59 AM

I've had an airflow meter on it for 3 hours total, all it did was show me how many more hours it's going to take getting it right... plus it kind of worried me how much my tuning it is screwing with what the chip is telling it to do

Mr Beau · 02-16-2005, 08:35 AM

You'll also be fighting against the O2 sensor for any situations where it normally runs closed loop (idle and part throttle situations mostly). You'll make changes to the settings at idle, the computer will think something is wrong (like lets say low fuel pressure) so it will compensate across the board.

Unless the meter has an input for load (i.e. TPS) so that it only modifies the signal during WOT operation, I don't know how you can accomplish much tuning.