MK5 Golf GTI
All Things Mk5 => How to Guides / Troubleshooting => Topic started by: SteveS on April 18, 2009, 01:13:31 pm
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00768
16684/P0300/000768 - Random/Multiple Cylinder Misfire Detected
Possible Causes
* Air Intake System leaking
* Fuel Supply faulty
* Injector(s) faulty
* Ignition Cable(s) and/or Spark Plug(s) faulty
* Ignition Coil(s) faulty
* Exhaust Gas Recirculation (EGR) Valve (N18) stuck/open
* Camshaft Position Sensor (G40) faulty
Possible Solutions
* Check Misfire Recognition
* Check Air Intake System
* Check Fuel Supply
* Check Injector(s) and Injector Sealing
* Check Ignition Cable(s) and Spark Plug(s)
* Check Ignition Coil(s)
* Check Exhaust Gas Recirculation (EGR) Valve (N18)
* Check Camshaft Position Sensor (G40)
Special Notes
* This DTC indicates that one or multiple cylinders are misfiring, but the ECU fails to identify the cylinder.
AND
00771
00771 - Fuel Level Sensor (G)
00771 - Fuel Level Sensor (G): Open / Short Circuit to B+
Possible Symptoms
* Fuel reserve displayed value 0 (empty)
Possible Causes
* Wiring between Fuel Level Sensor (G) and Instrument Cluster: Open or Short Circuit
Possible Solutions
* Check wiring between Fuel Level Sensor (G) and Instrument Cluster
* Check Measuring Block Value
00771 - Fuel Level Sensor (G): Short to Ground
Possible Symptoms
* Fuel reserve displayed value 0 (empty)
Possible Causes
* Fuel Level Sensor (G) damaged
Possible Solutions
* Check / Replace Fuel Level Sensor (G)
:confused:
im guessing the fuel supply is causing missfire?
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where did you get those codes ?
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where? from a memoscan vw/audi canbus handheld thingy :)
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what are your mods again?? you have standard fuel pump don't you??
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Just Carbonio and REVO Stage1.
Standard Fuel Pump yes.
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what are you revo settings at the moment??
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on revo stock
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not sure they are related tbh but Im no expert
Whats the time and date on both as you were running REVO mapped , got a CEL (which would have been stored) , then you dropped to stock REVO settings , then got the CEL again.
Ist one is common and may just be from excessive boost settings in REVO
2nd looks like something a dealer would fix and something needs replaced. (if it is remapped related REVO will know)
Ask REVO for their opinion
clear codes , run in stock mode , thrash it and see if you get 1 or 2 again. suspect you may just get no2
hth
john
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the CEL light stuck on with REVO settings, so dropped to stock to make sure all ok...
I guess theres nothing i can do but clear them and see if it happends again on stock. then on revo.
I could have had the boost too high...
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that's the thing, if you set the boost to like 7 or 8, with a stock fuel pump, it may cause those faults, but i ain't no expert either!!
did you change the timing / fuel numbers too when you played with the boost level??
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nah b8 t5 f9.. carl said should b ok, but weather has got warmer now for boost
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you upped the boost to 8, but didn't change the fuel to lower number (makes it run richer as 9 is leanest / most economical setting)
that might have been the problem then!
surprised carl said it was ok.
I remember AmD telling me that if i upped the boost, i'll need to reduce the Fuel number to increase fuelling.
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carl said standard pump couldnt provide more..?
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its not about providing more...
upping boost number doesn't increase boost per se (psi / bar), it makes the boost come on a bit more aggressively i think. so you change the Fuel number to make fuel supply match the way boost is now delivered.
but then Carl should know whats ok and what not so maybe i'm talking gibberish lol.
not sure about the other 2 codes re short circuit? very strange!
Mine's set at B6 T5 F9 and I've not changed it since.
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gonna clear errors put revo bk (lower boost) and see what happeneds
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chatting to people today steve, everyone with revo is running setting 5 , 7, and 9. with no issues on stage 1 revo ed30's . Try these settings.
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er, im guessing thats b7 t5 f9 ?
if so thats wot i just put it on
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Hi Steve,
Yes, you got it B7 T5 F9. Be interesting to see how you get on.
Dom
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well that horrid little yellow light flashed on again while iwas driving home, went off after a several flashs...
oh what to do! i have no1 round me with vagcom, no revo garage, the only i went to is 60miles away and cant say i was too impressed. so what could it be
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hedge has VAGCOM and he's down in reading, which is not that far from you.
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Steve Wont travel chungster!!!, unless theres a Bacon Butty at the end of it :smiley:
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Steve Wont travel chungster!!!, unless theres a Bacon Butty at the end of it :smiley:
LOL well he's fooked then! :mad:
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:angry015: lol
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Steve , its stabbing in the dark without some info, it could be the same codes or different !
Did it trigger any when running in stock mode??
How about asking on other VAG forums (briskoda/seat/golfgti etc) for a local VCDS helpful owner?
Other option is to just negotiate with a local dealer on a reasonable price to review and print out the code/s (painful)
or even get on the group buy (on this forum) and buy one?