Long crank time rover 25 1.6 LPG vehicle
Discussion
Hello
My previous post was here and many thanks for those of you who replied , it was useful to know others encountered similar problem with lpg vehicles:
http://www.pistonheads.co.uk/gassing/topic.asp?h=0...
Previous post contain obd readings above contains obd readings. Please see. If you could provide some answers to the question marks below would be very much appreciated.
Is it common for lpg cars to take a while to start after stalling only? I assume the flooding comment is valid as it is only after the car switches to lpg does it take a while approx 3-4 secs cranking to start.
Should the os12 downstream post cat sensors voltage reading stay constant as it does for my vehicle from above readings?
Also if it stays constant is the voltage of around 0.85 correct Or should it be lower?
For post cat sensor ,Does shrtft of around 99.2 sound right it never seems to change. Even before you switch engine on it stays at 99.2 I took a reading. while the voltage is 0.475 ,once you start engine and it is warmed up the voltage gets to 0.85 and stays constant.
Does the above sound right for the post cast sensor?
I also noticed from the obd reader when pressing read , I get following message:
P0340 pending camshaft position sensor A circuit bank 1 or single sensor, surprising no engine management light for this one like the O2 sensor. Any need for concern here?
O2 sensor management light which comes up randomly says po130 O2 sensor bank 1 sensor 1, but as you saw the obd readings above are fine. Some cars turn the management light on if an event happens for 20 seconds , wondering if this is what causes the management light to come one for the 02 sensor. Also mil-dist for the po130 error says 11000km , I only bought car two months ago. Does this mean previous owner did not fix this code for 11000 km?
In general car runs fine no problems apart from the long crank time after stalling and engine management light 02 sensor which pops up . Also the po340 pending code but this is what the obd reader picks up no management light for this one. Once I cleared the 02 sensor management light , if I press read on the obd reader I get the po340 code.
My previous post was here and many thanks for those of you who replied , it was useful to know others encountered similar problem with lpg vehicles:
http://www.pistonheads.co.uk/gassing/topic.asp?h=0...
Previous post contain obd readings above contains obd readings. Please see. If you could provide some answers to the question marks below would be very much appreciated.
Is it common for lpg cars to take a while to start after stalling only? I assume the flooding comment is valid as it is only after the car switches to lpg does it take a while approx 3-4 secs cranking to start.
Should the os12 downstream post cat sensors voltage reading stay constant as it does for my vehicle from above readings?
Also if it stays constant is the voltage of around 0.85 correct Or should it be lower?
For post cat sensor ,Does shrtft of around 99.2 sound right it never seems to change. Even before you switch engine on it stays at 99.2 I took a reading. while the voltage is 0.475 ,once you start engine and it is warmed up the voltage gets to 0.85 and stays constant.
Does the above sound right for the post cast sensor?
I also noticed from the obd reader when pressing read , I get following message:
P0340 pending camshaft position sensor A circuit bank 1 or single sensor, surprising no engine management light for this one like the O2 sensor. Any need for concern here?
O2 sensor management light which comes up randomly says po130 O2 sensor bank 1 sensor 1, but as you saw the obd readings above are fine. Some cars turn the management light on if an event happens for 20 seconds , wondering if this is what causes the management light to come one for the 02 sensor. Also mil-dist for the po130 error says 11000km , I only bought car two months ago. Does this mean previous owner did not fix this code for 11000 km?
In general car runs fine no problems apart from the long crank time after stalling and engine management light 02 sensor which pops up . Also the po340 pending code but this is what the obd reader picks up no management light for this one. Once I cleared the 02 sensor management light , if I press read on the obd reader I get the po340 code.
Shrtft is short term fuel trim, it shouldn't move about much.
Yes the second O2 sensor (post cat) reading should stay the same, if it moves about with the engine running the CAT isn't working.
Looking at your other thread, have you cleared the fault codes ? If so does the EML come back on and if so how quickly ? Does the TPS reading change as you open and close the throttle ?
It could be that the pre cat O2 sensor is working to a point but is going out of range every now and then bringing the light on. The data readings on a lot of scanners aren't that great and ideally you need to use an Oscilloscope to monitor it for a bit to see if there are any drops outs that occur that the ECU will pickup but the scan tool isn't quick enough to log.
As for stalling it, why do you keep stalling it ?
Thanks ,
The Tps does not move much even when rev goes to 2000, it seems to stay at that figure of 3.92% whether it revving or not. It only moves a bit sometimes, is this normal? If the Tps is 3.92% at idle when the engine is revved to 2000 or 3000 should the Tps move as well as mines does not move much , how much should it move to approx from 3.92%?
What's the test to see if the Tps is functioning correct? Any quick easy tricks?
The mil code is cleared but comes back randomly sometimes after 30 miles sometimes after 100 miles when cleared.
The car stalls sometimes as I get the feeling not enough gas is getting through sometimes.
Is the shrtft 12 of 99.2 for the downstream sensor correct which seems to stay cosnstant whether Idle or revving?
Is the voltage of 0.85 constant for downstream sensor too high ? I read somewhere it should stay constant between 0.45 and 0.7, also does the 99.2 % look too high , should it be more lower % given it is lpg vehicle.
From recent mot records 5 months ago the co level is 0.3% which is below max level of 3.5% with hc level of 74 out of max 1200. although two years back the car did exceed co with 4.6% with hc level of 668 and failed mot ,but head gasket was replaced after a head gasket failure failure around this time.
Thanks
The Tps does not move much even when rev goes to 2000, it seems to stay at that figure of 3.92% whether it revving or not. It only moves a bit sometimes, is this normal? If the Tps is 3.92% at idle when the engine is revved to 2000 or 3000 should the Tps move as well as mines does not move much , how much should it move to approx from 3.92%?
What's the test to see if the Tps is functioning correct? Any quick easy tricks?
The mil code is cleared but comes back randomly sometimes after 30 miles sometimes after 100 miles when cleared.
The car stalls sometimes as I get the feeling not enough gas is getting through sometimes.
Is the shrtft 12 of 99.2 for the downstream sensor correct which seems to stay cosnstant whether Idle or revving?
Is the voltage of 0.85 constant for downstream sensor too high ? I read somewhere it should stay constant between 0.45 and 0.7, also does the 99.2 % look too high , should it be more lower % given it is lpg vehicle.
From recent mot records 5 months ago the co level is 0.3% which is below max level of 3.5% with hc level of 74 out of max 1200. although two years back the car did exceed co with 4.6% with hc level of 668 and failed mot ,but head gasket was replaced after a head gasket failure failure around this time.
Thanks
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