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Post by critch on Oct 4, 2014 22:31:07 GMT 1
2003 1.6 16v
Poor cold start. It either starts and stalls or idles all over the show almost misfire type.
Sometimes has smoke from exhaust and smells really rich.
Bloke has attempted to himself
Fitted a throttle body
Fitted coolant temp sensor.
Carried out a full service today and asked to take a look.
Looses comms with diagnostic (snap on) when trying to view data when it's running crap so can't see anything that side.
No fault codes stored.
Tried a known good map sensor no change.
Disconnect vvt actuator and still same.
Once the revs stabilised managed to read data only thing that stood out was short term fuel trims in high minus numbers.
Any one seen anything like this?
Another mechanic has told me he's heard theirs a software update from renault anyone heard that?
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Post by Karl on Oct 6, 2014 10:54:19 GMT 1
Anyone help ?
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Post by chippie on Oct 6, 2014 11:30:43 GMT 1
I got a match and some oily rag.....  Why would a s/w upgrade resolve this? Would it be worth trying another diag reader? Perhaps a Renault one..... |
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Post by Rhubarb on Oct 6, 2014 15:28:15 GMT 1
Check condition of spark plugs and do a compression check
Wonder if it's been jump packed? spikey spikey
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Post by chippie on Oct 6, 2014 17:12:06 GMT 1
2003 1.6 16v Poor cold start. It either starts and stalls or idles all over the show almost misfire type. Sometimes has smoke from exhaust and smells really rich. Once the revs stabilised managed to read data only thing that stood out was short term fuel trims in high minus numbers. Ok, something more constructive than torching it.... Seems a contradiction, high neg fuel trim indicates a leaner mix yes? but you say its running rich..... O2 sensor(s) ok? Air leak somewhere? |
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Post by critch on Oct 6, 2014 17:40:26 GMT 1
Check condition of spark plugs and do a compression check Wonder if it's been jump packed? spikey spikey Fitted new spark plugs mate Had a full service other day he asked to service and look at that fault Didn't compression test it but maybe worth a shot It could well have done. Visually checked wiring Contact cleaner on all sensors and ecu connections Basically on the of chance I found something |
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Post by critch on Oct 6, 2014 17:45:20 GMT 1
2003 1.6 16v Poor cold start. It either starts and stalls or idles all over the show almost misfire type. Sometimes has smoke from exhaust and smells really rich. Once the revs stabilised managed to read data only thing that stood out was short term fuel trims in high minus numbers. Ok, something more constructive than torching it.... Seems a contradiction, high neg fuel trim indicates a leaner mix yes? but you say its running rich..... O2 sensor(s) ok? Air leak somewhere? O2s are reading ok once it's running as say can't get comms when having a paddy The fuel trims are the only thing that stood out Tested for air leak with brake cleaner and non found It smells really rick when its playing up. I've only got the snap on scan tool |
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Post by upkeep on Oct 6, 2014 19:45:45 GMT 1
Was the throttle body new? if not Has the guy got the old throttle body to replace the replacement body ( start again) square one.
As mentioned get it on a Renault diagtool with someone who knows how to drive it, as for Snap on scanners, not the best so may not be giving you all the info you need.
When did the fault occur? or has it been a gradual decline?
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Post by critch on Oct 6, 2014 19:56:49 GMT 1
Was the throttle body new? if not Has the guy got the old throttle body to replace the replacement body ( start again) square one. As mentioned get it on a Renault diagtool with someone who knows how to drive it, as for Snap on scanners, not the best so may not be giving you all the info you need. When did the fault occur? or has it been a gradual decline? It's been like this since he bought it Like say only had it a matter of weeks Fault was still their on other throttle that's why he had a go at changing |
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Deleted
Deleted Member
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Post by Deleted on Oct 6, 2014 22:31:26 GMT 1
Can you regain scanner comms by turning the engine off when it does this ? very strange symptoms !
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Post by Dragon on Oct 6, 2014 22:36:45 GMT 1
Are you looking at this through OBD or going through Renault side?
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Post by critch on Oct 7, 2014 0:01:35 GMT 1
Can you regain scanner comms by turning the engine off when it does this ? very strange symptoms ! Yes mate but as soon as engine either starts violently hunting or cuts out looses comms until restarted |
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Post by critch on Oct 7, 2014 0:02:35 GMT 1
Are you looking at this through OBD or going through Renault side? Both mate |
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french crap fanatic
Apprentice
french car specialist based in dagenham east london
Posts: 3,355
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Post by french crap fanatic on Oct 7, 2014 16:19:18 GMT 1
2003 1.6 16v Poor cold start. It either starts and stalls or idles all over the show almost misfire type. Sometimes has smoke from exhaust and smells really rich. Bloke has attempted to himself Fitted a throttle body Fitted coolant temp sensor. Carried out a full service today and asked to take a look. Looses comms with diagnostic (snap on) when trying to view data when it's running crap so can't see anything that side. No fault codes stored. Tried a known good map sensor no change. Disconnect vvt actuator and still same. Once the revs stabilised managed to read data only thing that stood out was short term fuel trims in high minus numbers. Any one seen anything like this? Another mechanic has told me he's heard theirs a software update from renault anyone heard that? not heared of any software updates for this. is it running a sagem s3000? if so get it sent away for testing,this ecu is easily corrupted or damaged. were the cts and other parts fitted genuine? can you smoke test it? |
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Deleted
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Post by Deleted on Oct 7, 2014 18:42:08 GMT 1
is it worth getting this involved in it ?
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