MAP - does anyone recognise this?

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MjrLeeStressed
MS/Extra Newbie
Posts: 18
Joined: Tue Sep 23, 2014 2:08 pm

MAP - does anyone recognise this?

Post by MjrLeeStressed »

Is this a MAP?
If so, does anyone know the model or specs?
it's located at the end of my throttle body.

Car was converted by previous owner. I'm flying blind here as a novice.
Attachments
MAP unknown.gif
MAP unknown.gif (111.6 KiB) Viewed 450 times
R100RT
Super MS/Extra'er
Posts: 1039
Joined: Thu Jun 30, 2011 12:45 pm
Location: British Columbia

Re: MAP - does anyone recognise this?

Post by R100RT »

Throttle Position Sensor
1983 BMW R100RT Motorbike
Turbocharged - Water/Meth
Sequential Ignition & Fuel
"Perky Sleeper" that excites bike enthusiasts once discovered (or being passed)
Newest project - 1995 BMW K75 is V3 Microsquirt, "Turbocharger - Of Course"
goodysgotacuda
Helpful MS/Extra'er
Posts: 125
Joined: Sun Oct 05, 2014 5:07 pm

Re: MAP - does anyone recognise this?

Post by goodysgotacuda »

Looks like a TPS to me.
1972 Plymouth 'Cuda - 5.7L Hemi w/T56 Magnum

MS3 Gold Box, TunerStudio MS/MegaLogViewerHD user
tryingbe
Experienced MS/Extra'er
Posts: 196
Joined: Tue Sep 05, 2017 3:19 pm

Re: MAP - does anyone recognise this?

Post by tryingbe »

MjrLeeStressed wrote:Is this a MAP?
MAP sensor either goes into the intake manifold or has a vacuum hose going to it.
1985 Dodge Omni GLH Turbo MicroSquirted 367whp http://www.msextra.com/forums/viewtopic ... 04&t=67324
MjrLeeStressed
MS/Extra Newbie
Posts: 18
Joined: Tue Sep 23, 2014 2:08 pm

Re: MAP - does anyone recognise this?

Post by MjrLeeStressed »

TPS sounds logical.
This one has me stuffed! I'll search again tomorrow in the daylight.
Thanks for your suggestions.
R100RT
Super MS/Extra'er
Posts: 1039
Joined: Thu Jun 30, 2011 12:45 pm
Location: British Columbia

Re: MAP - does anyone recognise this?

Post by R100RT »

Are you having an issue, or just documenting components on your vehicle? ( to develop a B.O.M.)
Sometimes doing a google image search on TPS's helps in identification.
1983 BMW R100RT Motorbike
Turbocharged - Water/Meth
Sequential Ignition & Fuel
"Perky Sleeper" that excites bike enthusiasts once discovered (or being passed)
Newest project - 1995 BMW K75 is V3 Microsquirt, "Turbocharger - Of Course"
MjrLeeStressed
MS/Extra Newbie
Posts: 18
Joined: Tue Sep 23, 2014 2:08 pm

Re: MAP - does anyone recognise this?

Post by MjrLeeStressed »

The reason for this is 2-fold:
1. Documentation of components.
2. Although the car runs OK, I believe the fuel economy is compromised. The car is a 1500cc Triumph Spitfire, yet the fuel used seems closer to a 6200cc V8 on steroids.

After searching further this morning (via google as suggested and tracing tubes from under the dash to the engine bay. This is what I found (images).

a. Vacuum tube in engine bay is T-joined to the PSI gauge.
b. Vacuum tube under the dash to the ECU suggests an internal MAP.
c. Guessed, yet seemingly likely MAP = MapDaddy Dual 4-Bar MAP sensor. <--- Happy for suggestions on this theory.
Attachments
a.
a.
MAP vacuum Tube EngBay.gif (193.89 KiB) Viewed 372 times
b.
b.
MAP Vacuum Tube ECU.gif (130 KiB) Viewed 372 times
c.
c.
MAP MapDaddy Dual 4Bar Sensor.gif (61.15 KiB) Viewed 372 times
MjrLeeStressed
MS/Extra Newbie
Posts: 18
Joined: Tue Sep 23, 2014 2:08 pm

Re: MAP - does anyone recognise this?

Post by MjrLeeStressed »

Ad Lib:

History: I purchased the car with EFI. It needed a tune; i had zero information on the EFI version and zero knowledge of EFI tuning and the components needed.

I stumbled on finding the version as Megasquirt and now I'm self teaching the finer tuning techniques. My goal is to ensure ALL base settings are correct now, as I've found autotune in TunerStudio not effective at the 2000 rev range. I don't know why it changed, but now the engine seems confused at about that range and the MAP at cruise seems high (not far off 100kPa).

A couple of images..
Image d (current settings in TunerStudio)
** Deleted ** Image e (if the above MapDaddy is correct, settings) Now obsolete, as I believe the sensor is (MPX4250AP)
image f (actual photo inside ECU) I don't want to pull this apart in case I dislodge something internally).

Notes in Tunerstudio state:
MAP Sensor Calibration
For the MPX4115 use 10.6 and 121.7
MPX4250 10.0 260.0 <<< It looks like these are the figures I'll use. Live test and results to come. :idea:
MPXH6300 1.1 315.5
GM 3-BAR 1.1 315.5
MPXH6400 3.5 416.5
Attachments
Image d (current settings in TunerStudio)
Image d (current settings in TunerStudio)
MAP Setting current 231017.gif (18.97 KiB) Viewed 371 times
Image f
Image f
MAP actual.gif (82.9 KiB) Viewed 368 times
MjrLeeStressed
MS/Extra Newbie
Posts: 18
Joined: Tue Sep 23, 2014 2:08 pm

Re: MAP - does anyone recognise this?

Post by MjrLeeStressed »

Result: No significant change. I do believe this is the correct setting though. Problem is caused somewhere else.
I'll post my data in another post named: Autotune result making engine run worse. Data attached.
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