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Old 5th December 2015, 21:28   #1
thegreatdaddo
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Default Do I need a new MAP sensor?

The story so far - Had a high power momentary misfire on my 1.8T when accelerating at full throttle in 4th gear at about 4,000 rpm. Yes I like to have fun occasionally. Checked the ECU fault codes and found P0106 = MAP sensor out of range. I removed the sensor a few days later and found it was wet with what looked like engine oil. I am thinking this may indicate that the turbo is leaking oil into the inlet, although oil consumption is low and there is no blue smoke in the exhaust. My car has done 80,000 miles and is on the original turbo. I have always changed the oil every 12 months to prolong engine and turbo life. Any advice on what to do next would be appreciated.
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Old 6th December 2015, 16:14   #2
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Are you sure the boost control solenoid is working correclty? Or the the more common vacuum pipes that connect it to the wastegate? Causes overboost at around 4000rpm And the ecu cuts fuel to protect the engine, then will resume up to redline.
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Old 6th December 2015, 22:26   #3
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I have changed the boost control solenoid but it has not made any difference. The pipes are original and look OK with no deterioration visible. Would a defect in the solenoid or pipes give a P0106 fault?
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Old 6th December 2015, 23:08   #4
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Check carefully the wiring to where it enters the MAP sensor plug

Common fault on the 1800T, I have experienced this on several occasions.

Brian
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Old 29th April 2017, 08:34   #5
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Quote:
Originally Posted by marinabrian View Post
Check carefully the wiring to where it enters the MAP sensor plug

Common fault on the 1800T, I have experienced this on several occasions.

Brian
Big bump! Think this is my problem- the wires are very brittle and one is, I'm fairly sure, snapped but don't want to tug it! What do I actually need to do to sort it? I'm a bit useless so simple directions needed!
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Mike
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Old 29th April 2017, 09:12   #6
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Ignore - wrong thread!

TC

Last edited by T-Cut; 29th April 2017 at 09:16..
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Old 29th April 2017, 09:20   #7
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It may be a worth a trip to the scrapyard to harvest a section of loom.

It doesn't have to be a 75 any MEMS3 K series engined car will do, 25 45 ZR ZS or Freelander

Simply cut off a section of loom with a reasonable length, then connect using solder and heatshrink

I don't know why the 1800T seems to suffer from this when the other cars don't

Best of luck

Brian
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Old 29th April 2017, 10:54   #8
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Quote:
Originally Posted by marinabrian View Post
It may be a worth a trip to the scrapyard to harvest a section of loom.

It doesn't have to be a 75 any MEMS3 K series engined car will do, 25 45 ZR ZS or Freelander

Simply cut off a section of loom with a reasonable length, then connect using solder and heatshrink

I don't know why the 1800T seems to suffer from this when the other cars don't

Best of luck

Brian
It's snapped right at the top where it goes into the sensor- haven't taken the sensor off- what's inside? Could it just be re wired into it? Looks like there'd be enough play to do that but being a bit ignorant of this stuff I don't know whether it'd be worth a crack?
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Old 29th April 2017, 14:16   #9
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Re wired and seems okay. Had a diagnostic, not t4 though and following error codes came up:
P0113 IAT sensor signal too large
P0106 manifold absol/barometric pressure outside range
P0500 vehicle speed sensor malfunction( weird as it clearly works)
P1520 unknown but Google says O2 sensor high voltage.

First too seem to be likely to be caused by the wiring fault, no idea why the speed one comes up and have no idea what p1520 means!

Any further wisdom to share?
Booked in for t4 on 9th with a guy Lates recommended so hopefully okay until then!
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Old 29th April 2017, 17:03   #10
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Touch wood, seems sorted. No engine light and a bit of jiggling with the yellow connectors and no airbag light either. Just need to sort a FOC and spy hole mod the plenums, new rear brakes and should be able to start doing more exciting things like new long life or similar exhaust, better front seats and fitting a stereo! ( unless one of the error codes mentioned before is ominous)

Thanks for all the help and advice.
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