Running Rough When Cold
#1
Posted 30 June 2019 - 08:02 AM
Code was P0107 which is MAP sensor fault apparently but this may have just been because it was running so rough it spiked at a point out of the range maybe?
The cold calibration is rubbish so drives badly for the first couple of minutes usually, but this is very difficult to keep it running which is never a problem.
When it's properly hot it feels perfect so wondered if it could be the egr valve stuck open? It's still in operation as it's not caused a problem before.
Just be good to see if anyone could confirm this is likely or if it could be something else as I'm really busy at the moment so didn't want to waste any time.
I have opcom which I could confirm the egr is operating properly or check something else.
Thanks in advance.
Dan
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#2
Posted 30 June 2019 - 08:53 AM
EGR should be blanked off on a SC conversion, so will not cause any issues.
Faulty MAP sensors are a common problem with a Courtenay mapped SC conversion, mainly caused by secondhand MAP sensors being used or aftermarket MAP sensors.
So always try and use a new genuine MAP sensor, these don't cause as many problems.
The Dutch mapped cars use a TMAP and these do not suffer the same issue, even with secondhand sensors.
#3
Posted 30 June 2019 - 08:57 AM
I'll check when I have time but I think the egr isn't blanked off
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#4
Posted 30 June 2019 - 09:07 AM
there is no connection to the inlet manifold for an EGR, so all it would do if not blanked off is leak and make a noise.
Having done quite a few SC conversions over the years my experience for a rough start up is a duff MAP sensor, however a faulty throttle body can also give similar issues. That said you had a MAP error code, so start with a new MAP sensor
P0107 Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
#5
Posted 30 June 2019 - 09:08 AM
I'll let you know how I get on.
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#6
Posted 30 June 2019 - 09:41 AM
Bosch 0261230042
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#7
Posted 30 June 2019 - 09:47 AM
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#8
Posted 30 June 2019 - 09:58 AM
that is the TMAP sensor, so not for the courtenay mapping
Courtenay sell them for £63 https://www.courtena...Sensor-Z22SE-SC
#9
Posted 30 June 2019 - 09:59 AM
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#10
Posted 30 June 2019 - 09:59 AM
correct part number is 16235939 according to this thread - http://www.vx220.org...-sc-map-sensor/
#11
Posted 30 June 2019 - 11:51 AM
I had a blanking plate and cheater. If I didn’t give it to you I’ll check around the garage
#12
Posted 30 June 2019 - 11:54 AM
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#13
Posted 04 July 2019 - 04:25 PM
Still can't really understand why it would be fine when it's hot, assume it's a sensitivity issue when it's cold?
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#14
Posted 05 July 2019 - 08:42 AM
could be a sealant problem which you notice more from cold and high vacuum
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