MAF Sensor Position? (Turbo)
12-22-2008, 02:19 AM
#32
Bingo. That is the part and that is the way it should look for installation. I'll get you some data on the wiring tomorrow, provided I don't get incarcerated following my court appearance in the morning for a speeding ticket I got a while back.
Maybe the Wickenburg Jail has WiFi.
Yes, I did see the humor in your remark.
However, having spent several years as part of the Probe community, it is my obligation to deflect the never-ending parade of ***** jokes that is part of the Ford Probed ownership experience.
Maybe the Wickenburg Jail has WiFi.
Yes, I did see the humor in your remark.
However, having spent several years as part of the Probe community, it is my obligation to deflect the never-ending parade of ***** jokes that is part of the Ford Probed ownership experience.
Last edited by MazdaManiac; 12-22-2008 at 02:21 AM.
12-22-2008, 02:36 AM
#37
Exactly. But without the chair.
The "nipple" points into the flow.
That makes the other end the "back"
The three connections closest to the "back" are wired to the three IAT wires on the MAF harness.
I just don't remember off the top of my head what goes where.
12-22-2008, 02:41 AM
#38
/\ i hope you are wrong about that cause i cut the two "back" wires off my plug and assumed the three wires closest to the nipple were the ones to use
pretty sure the two back wires went to that variable resitor .....
I guess I'll have to wait till you get out of Jail - heh - hope the judge is feeling the xmas spirit and goes easy on you ....
pretty sure the two back wires went to that variable resitor .....
I guess I'll have to wait till you get out of Jail - heh - hope the judge is feeling the xmas spirit and goes easy on you ....
Last edited by Brettus; 12-22-2008 at 02:45 AM.
12-22-2008, 11:23 PM
#41
Did some logging this afrternoon with new temp sensor in place - seems to work well .
Possibly running richer although that could be the fuel trims adjusting to the new sensor location - not sure yet.
The sensor may not be fast enough to measure turbo heat surges . Either that or my intercooler is working well ....
ambient temp 23C - intake air at start of run 34C - end of run 36C
Possibly running richer although that could be the fuel trims adjusting to the new sensor location - not sure yet.
The sensor may not be fast enough to measure turbo heat surges . Either that or my intercooler is working well ....
ambient temp 23C - intake air at start of run 34C - end of run 36C
Last edited by Brettus; 12-22-2008 at 11:35 PM.
12-27-2008, 11:15 PM
#47
MM - What sort of temp rise are you seeing with your turbo after a run through the gears ?
I'm seeing about 13 deg. above ambient at end of run .
If i went way outside the efficiency curve of the turbo - do you think the sensor would be fast enough to see what was going on ?
Last edited by Brettus; 12-27-2008 at 11:20 PM.
12-28-2008, 12:01 AM
#48
(Verified with a fast thermocouple and a laser thermo.)
Good IC, very good turbo.
The PCM is not expecting very fast temperature rises on that sensor.
01-02-2009, 04:42 PM
#49
Was about to do a DIY on this but started thinking about what was actually happening here and now I'm not so sure it is such a good idea .
MAF is calculated by the pcm by measuring air velocity and temperature at a set point in the intake .
Any point in the intake will have the same MAF (unless there s a leak somewhere) .
So : it stands to reason , if you measure velocity at one point and temp at a different point where the air is hotter - MAF will not be accurate .
End result will be leaner than ideal ixtures as temp goes up because pcm will compute a lower than actual MAF ........
MAF is calculated by the pcm by measuring air velocity and temperature at a set point in the intake .
Any point in the intake will have the same MAF (unless there s a leak somewhere) .
So : it stands to reason , if you measure velocity at one point and temp at a different point where the air is hotter - MAF will not be accurate .
End result will be leaner than ideal ixtures as temp goes up because pcm will compute a lower than actual MAF ........
