Greg1987

Hey guys I have a evo 8 with link g4x. Look like I have some knock on cyl 3 and cyl 4 at around 8k rpm. I was trying everything to get rid of this knock in this area but no luck. Does it look ok I mean is this some false knock or is this real knock and I have to find the way to take care of this? I was trying richer/leaner more timing/less timing with same results. Car is running on e85 fuel big turbo laud twin disc clutch. Thanks for help!

Hey guys I do have an update. It was bad cam sensor. Look like g4x using this sensor more than stock ecu. I changed camshaft sensor and car is back in service.

Thank you so much for explanation. Ok so I did unplugged cam sensor while engine was idling and the engine died immediately. So look like it does need cam sensor to run. To the supressor on the coil power supply I have no idea to be honest with you. I have coil on plug denso coils with the wiring that the coils came with (I purchased it as a kit). Since car need cam sensor to run and since they are prone to fail (even mine is couple weeks old) I will order new cam sensor first and if that will not help I will try new crank sensor and see the results!! Coil ground has good clean point on the cylinder head but I will also add extra ground straight from negative battery and see if there is any change.

The lowest boost I can run is 25 psi. How can I reduce noise from ignition? Is link ecu more sensitive for that kind of noises than oem ecu? I was running as high as 37-38 psi on oem ecu and did not had any of those problems. Maybe I should change camshaft and crankshaft sensors and try that first? They are couple weeks old but you never know maybe one of those sensors going bad??

Here is another logger from today. I spent some time today to look for a problem with no luck. I changed all ignition coils, spark plugs, I checked and tested wires also crank and cam wires. I added extra ground to the crank sensor and still cut at around 6000rpm. I lowered the car with boost to minimum still the same cut. When the cut happens my cluster rpm goes to 0 rpm and than back to 6000rpm. I checked my map again and still no luck. I put oem ecu again today and car run perfect with no cut or anything similar to the one on link so what link is using that oem doesn't to make that issue?. Please please help me guys I am retired of ideas what can make this problem and my only option would be to keep the car on stock ecu . There is nothing in the tune that can do this, Map limit is set to 450kpa where I am at 300kpa during boost. rpm limit is set to 8800 and cut is happening at 6000rpm. Thanks!! PC Datalog - 2022-07-31 12;20;33 pm.llgx

Maybe I got those scopes not in the right time. It is so hard to be on boost and click capture when car has cut. The cut is so massive that feels like I am hitting the wall. Spark plugs I have are ngk br8es they are resistor type. Ignition system is coil on plug honda denso coils. Those coils are known to be great up to 800whp and high boost. On the logger trigger 1 is reading 0 rpm when cut happens. Any idea? Thanks

Ok, guys something very strange is happening. To test it I change the car to the stock ecu and this stock ecu has been tuned with exactly same timing, same afr and same boost as link ecu. On oem ecu car has absolutely no cut at all. Runs perfect and smooth on full boost. I was driving the car for 2 hours non stop and car has never had any sign of cut or even a little misfire, runs perfect! So I came back to my garage and switched to link and first pull I did car had massive cut at 6500rmps. Can you guys please check what is going on?? Look like some trigger issue on link ecu. I am including another trigger scope that I hope I did in a right time of a cut. Thank you!! TriggerScopeLog4.llgx

Here is triggerscope but I am not sure if I catch it in the right moment. I can still try to do other trigger scopes. On this one I can see voltage on trigger 1 is around 3.20v but sometimes jumping to 2.90 and 4.10v and in couple places to 0.23 and 0.69V Is this how that should be? TriggerScopeLog1.llgx

I will triple check the wiring and connection. It is not doing it every pull but very often. I would say every 2nd pull and it is happening only at full throttle full boost in around 6500 rpm area. On light throttle runs perfectly fine. I will try my best to do triggerscope around that area

You are right. Look like trigger 1 reading no at that time. It is Crankshaft sensor right? Both sensors are couple weeks old. Where should I look for problem? Should I get new sensor or I have wiring issue? Thank you

Hello, I have a problem that I can't figure out. I have link g4x on lancer evolution 8. I started tuning the car and I have cut at around 6000-6500rpms. It is not a misfire it is cut like you hit the wall. I tried spark plugs, coils and still same problem. It is happening only on boost. First I was thinking it is my tune a problem but I was trying everything ( leaner, richer, less timing, more timing) and still same problem. I was able to catch that on the logger and look like whenever I have a cut my rpm read 0rpm. Bad camshaft or crankshaft sensor? I changed both of them couple weeks ago. Please help. I am including 2 loggers. Thank you!!!! PC Datalog - 2022-07-29 11;12;00 pm.llgx PC Datalog - 2022-07-29 10;51;08 pm.llgx

I am running similar timing as you are but I am on e85. If you are running on stock intake manifold you should turn on individual cylinder fuel correction and add 1-2% to cyl 3 and 2-3% of fuel to the cyl 4. Stock evo intake manifold is designed that way that 3rd and 4th cylinder is running leaner than other 2 cylinders. Also 11.4-11.6 afr on pump gas I would say is not lean but on leaner side plus 3rd and 4th cylinder was probably running leaner than that and your timing did not helped at all.

I will sent map tomorrow. Here is picture that I made earlier today. I was trying to change driven wheel speed source to left or right wheel but no luck. I think I am doing something wrong Those settings are set to NONE I think this is my problem right?

Got it thanks for help. I notice that on default 320btdc car was running poor on low rpms (idle and cruise) but on 500 runs pretty good. I will keep it where it is. thanks

Thanks Adam. What should I set it to at driven wheel speed. I will try to play with it today or tomorrow and I will post the results.