MAP and or Air Pressure sensor fault

[jjd]

Hi all
Potted summary. First saw this five years ago, owner fitted straight through pipes, cat delete. At some point it has had the idle control removed and sets tickover by the throttle stop screw. Used TuneECU to load appropriate map, all well. He rode it but the dreaded gearbox issue raised its head. Went off to have that sorted, came back and between covid and then him sadly passing away, it has stood for four years.
His son asked me to get it going again, usual, new battery, drained tank and refilled with fresh fuel. Came to start it and its pops and bangs, very unhappy. Found one of the vacuum hoses disconnected from cyl. no. 3. Reattached, idle now steadier, but tuneECU reports MAP or Air pressure sensor short or open curcuit. Both seem to measure OK but.... I have two three pin plugs that both fit on the MAP on the wiring loom. Can someone please confirm the colour codes for the correct MAP connector, and any other hints or tips to check..... please! I have ordered an new MAP sensor, but I am not sure that this is the cause of the problem. Not sure how much is disturbed in doing the gearbox repair, and sitting for all this time has obviously had an impact as well. Any and all pointers gratefully recieved!
Cheers.

 

[TURBO200R4]

first thing we need to know is the year, model, make to get started
if it is backfiring through the throttle bodies then on each backfire you need to check the hoses because it will blow them off.
give code numbers.

 

[jjd]

year is 2005. Popping from the exhaust, tickover is stumbling which it would if the MAF/ Pressure sensor is faulty. It just seems strange that tuneECU is now reporting short/open circuit MAP / pressure sensor with all the vacuum hoses now connected but not before with cyl. 3's hose disconnected. Hoping the extra 'suck' has caused the MAP to fail...... Awaiting delivery of replacement MAP to eliminate (or solve) the problem.
Cheers......
(As an aside, the wiring diagram shows the two sensores connected to the same 12v supply line. But there is 12v to the Map connector so I'm counting that as good and the earths measure OK too....)

 

[Kevin frazier]

Whats the throttle body balance say on tune ecu?

 

[jjd]

Whats the throttle body balance say on tune ecu?

Not at the bike for few days until MAP sensor arrives, will do a fuller report then
Cheers

 

[Kevin frazier]

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.

 

[atomsplitter]

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.

+1 on TB balance is essential. My 05's TB's went out of sync and there was a lot of surging at low throttle and lots of decel pop. Most of it cleared up (especially the surging) once the TB's were all playing nice with each other.

 

[TURBO200R4]

year is 2005. Popping from the exhaust, tickover is stumbling which it would if the MAF/ Pressure sensor is faulty. It just seems strange that tuneECU is now reporting short/open circuit MAP / pressure sensor with all the vacuum hoses now connected but not before with cyl. 3's hose disconnected. Hoping the extra 'suck' has caused the MAP to fail...... Awaiting delivery of replacement MAP to eliminate (or solve) the problem.
Cheers......
(As an aside, the wiring diagram shows the two sensores connected to the same 12v supply line. But there is 12v to the Map connector so I'm counting that as good and the earths measure OK too....)

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

 

[warp9.9]

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.