Konstantinos Korres1436215376 Posted August 12, 2009 Report Share Posted August 12, 2009 hello , I have a Link G4 storm installed on my toyota 4 cylinder turbocharged engine that runs stock wasted spark ignition and stock crankshaft trigger wheel 36-2, along with a KnockLink wired to the stock sensor but not correctly setup yet. The engine idles perfectly but above 4000rpm on WOT the car struggles to rev and while logging i noticed some weird dwell readings. Moreover the spark plugs of the first wasted spark bank 1-4 often come out with melted electrodes indicating pre-ignition while the other two of the bank 2-3 always come out in perfect condition. while the dwell is configured from 1.4 to 2.2 along the rev and voltage range there are readings of 0,05 as well as 3,81. I suspect wrong trigger calibration or valve clearance issue even though the smooth idle does not point towards it. I have attached one log file. Any help would be appreciated , thanks.1.txt Quote Link to comment Share on other sites More sharing options...
Simon Posted August 13, 2009 Report Share Posted August 13, 2009 Check to see if you are getting any trigger errors. Also make sure you have resistive plugs fitted. Unstable dwell usually points to triggering problems. Simon Quote Link to comment Share on other sites More sharing options...
Konstantinos Korres1436215376 Posted August 14, 2009 Author Report Share Posted August 14, 2009 Today i re-callibrated the trigger wheel and was ok , Checked valve clearance and was also ok , checked compression and had 150-190-190-150 and i suspect burnt head gasket due to water overheating, could the burnt head gasket justify the pre-ignition above 4000 on boost and the weird dwell readings ? thanks !! Quote Link to comment Share on other sites More sharing options...
Konstantinos Korres1436215376 Posted August 14, 2009 Author Report Share Posted August 14, 2009 forgot to mention that i do use resistive plugs. Quote Link to comment Share on other sites More sharing options...
Konstantinos Korres1436215376 Posted August 17, 2009 Author Report Share Posted August 17, 2009 Today i removed the cylinder head because last night one porcelain insulator broke from spark plug no4 and dropped into the cylinder while driving. The piston surface is ruined on the fourth cylinder as well as the engine head on top of that piston. Pre-ignition signs are very obvious , broken piston rings on cylinders no 1 and 4 and scratched cylinder surface. Is there any connection between dwell readings and this phenomenon ? Was there any way i could see that coming via the logs and avoid it ? Quote Link to comment Share on other sites More sharing options...
Konstantinos Korres1436215376 Posted August 18, 2009 Author Report Share Posted August 18, 2009 i have NO trigger errors , no errors indicated by the ecu , how can the dwell have such weird readings and not having any trigger errors at all ? Quote Link to comment Share on other sites More sharing options...
Simon Posted August 19, 2009 Report Share Posted August 19, 2009 Can you email through your PCL file? [email protected] Quote Link to comment Share on other sites More sharing options...
Konstantinos Korres1436215376 Posted August 20, 2009 Author Report Share Posted August 20, 2009 mail sent ! Quote Link to comment Share on other sites More sharing options...
Typ17 16vg60 Posted May 13, 2018 Report Share Posted May 13, 2018 Hallo, Give it results about this Phänomen? Greetings Quote Link to comment Share on other sites More sharing options...
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