MAP and or Air Pressure sensor fault

TURBO200R4 said:

color codes
map sensor
pin# 1 pink wire to a01 5 volts
pin# 2 pink/black to a07 ground
pin# 3 pink /slate or gray
it does not use 12 volts

Click to expand...

Thank you very much for that! As I said, there are two connectors on this loom, both in very close proximity to the MAP. Guessing I chose wrong! Hopefully that has caused the MAP to fail.

Kevin frazier said:

Before changing parts, you could check balance and check voltage for map sensor using tune ecu. If throttle bodies arnt balanced its gonna run rough. Examples below of what pages to look at.

Click to expand...

Hi. I'm using the PC version of tuneECU, not seen that page, but still finding my way around.

warp9.9 said:

Did you get the stepper motor with it ?
If so when you are done getting her sorted out you might end up putting it back on the bike so it runs right and you can perform proper maintenance . Like a full ISCV reset. The simple 12 minute time operation to sync the ECU with the engine sensors.

Click to expand...

Hi. No stepper motor. Lord knows what has happened in the five years since I last saw this one. A lot of things I've found to be less than optimal, looses hose clamps on the TB's etc.

R-III-R Turbo said:

The other plug that the MAP sensor fits, in the same area under the tank, is the heated grips one.
Just make sure MAP sensor is plugged into the one with a pink wire.
Then check MAP values as lads said - common misconception is the 3 cylinders' numbers don't matter as long as they're relatively even, this is not true - they should be in around the 5-6xx hPa range depending on a few things

Click to expand...

Thanks, that's cleared that little puzzle up. Daft idea! Although, I admit, mea culpa for not clearly marking things when I disconnected, (Needed the airbox system off to attach the vacuum hose to cyl. 3)

R-III-R Turbo said:

Click to expand...

Hi all and thanks 'bigly' for all the help. Replacement MAP fitted, still throwing fault code. Turned out that one of the connector pins was very dirty on the MAP, a good clean restored harmony, fault code cleared. (Used part, but it works). Throttle balance readings off the map, no wonder it sounded like a bag of marbles in a tin can. Had to get my old vacuum gauges out to get it somewhere near. (Who has had a go at this I wonder?) Finally, its now within the tune ECU capture range. Balance is not far off, but by now the engine is cooking itself and me so will return to this in the morning.
I'm working in a small garage, so the atmosphere gets pretty poisonous after a while, somewhat restricting the time I can spend in there, that's why this is taking longer than it should.
I do, however, suspect the TPS is worn or faulty, the voltage reading has a slight fluctuation when engine not running and does not hold its setting when the throttle is blipped, varying around the set point when the throttle is released back to the rest point. I'm debating taking it off and manually turning it through its stroke to hopefully clean the contact track...... Unless anyone knows better?

Reading the sticky posted by Skillilo regarding the TPS. Seems I am in the same territory. How can dealers ask £130 for what is nothing more than a rotary volume control!!!
However, I think I might have a more fundamental problem. When adjusting throttle body balance, I can get cyls, 2 and three to balance perfectly at 650, but to have the motor run smoothly, no. 1 is at 600. Correct if wrong, but this indicates that cyl. 1 is having to be run with more throttle to achieve a balanced feeling engine. (Less vacuum, wider throttle opening). Bringing cyl 1 nearer to 650 results in a very lumpy tickover and a rough rev up. I might have to do a compression test here, unless I am missing something or being particularly stupid? (Not unheard of!)
P S Setting idle with my vacuum gauges give a smooth tickover, its only when I refer to tuneECU that the disparity becomes evident, the gauges dont care about steenking numbers, it just pulls vacuum according to throttle adjustments.

According to my service manual the MAP sensor provides the input to the diagnostic tool (in this case your TuneECU). There is an allowable tolerance between TBs that Triumph's service tool will simply display the word BALANCED. If that word is not displayed in the service tool then that indicates balancing is needed. Tune ECU is simply giving you what the MAP sensor output is for each TB. The manual states that TBs cannot be balanced using vacuum measurement, but must be done using the diagnostic tool. The reading is supposed to be in mm/Hg (millimeters Murcury). There are two adjusting screws that adjust cylinders 1 and 3 to number 2. If you can't get the number 1 cylinder to match the other 2 there may be a connection problem (or hose issue) with the MAP sensor.

Try resetting adaptations before balancing throttle bodies.

Hose length matters and will change readings.

Just my opinion
my opinion is you are suppose to have every thing set up with the stepper motor 1st then the tps and when it is running decent you balance the throttle bodys
and then you raise your idle to around (in your case) 640 on #1 then set #2 and #3 to number #1
you can not cure all problems with a balance throttle
since it has been muffed up this is what i would do.
get it warmed up then set #1 cyl by turning the idle screw in around 1/4 turn this should bring #1 to about 640 then adjust #2 and #3 so they are all about 640
of coarse every thing depends on
if you have good fresh gas
if your vacuum hoses are good and the same length
some times the vacuum tee gets a crack
ect