ozyvr4 Posted August 12, 2020 Report Share Posted August 12, 2020 I'm having an issue with RPM spike that is activating the RPM cut . It happens at random and I am stumped to how to fix. It started to happen a couple weeks ago. Before this the car has been running fine I checked over the wiring . It all seems good. I rewired the harness last year with new TXL wire and new plugs . Any ideas would be great . VR4Link spike.pclr Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 13, 2020 Report Share Posted August 13, 2020 That doesnt look like a map you have attached, it should be more like 160Kb. A log and triggerscope would be helpful too. Quote Link to comment Share on other sites More sharing options...
ozyvr4 Posted August 13, 2020 Author Report Share Posted August 13, 2020 I'm trying to upload log file but t too large. Im trying to reduce but I cant figure out to how to. I zoom on the area where the spikes are but when I save it, it saves the complete file. Ill have to do another trigger scope as it did not save. Quote Link to comment Share on other sites More sharing options...
dx4picco Posted August 13, 2020 Report Share Posted August 13, 2020 upload them on some File host like google drive Quote Link to comment Share on other sites More sharing options...
ozyvr4 Posted August 13, 2020 Author Report Share Posted August 13, 2020 https://www.dropbox.com/h?preview=Log+2020-08-7+11%3B08%3B34+pm.llg I loaded to dropbox. This is the first time I have tried this. Quote Link to comment Share on other sites More sharing options...
ozyvr4 Posted August 13, 2020 Author Report Share Posted August 13, 2020 https://www.dropbox.com/s/2eldcrncwnse071/Log 2020-08-7 11%3B08%3B34 pm.llg?dl=0 Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 13, 2020 Report Share Posted August 13, 2020 Definitely a trigger issue so start with the triggerscope. If the triggerscope looks normal then it can be difficult to diagnose an intermittent problem like this. Can you confirm it has resistor spark plugs? Quote Link to comment Share on other sites More sharing options...
ozyvr4 Posted August 14, 2020 Author Report Share Posted August 14, 2020 Yes . BPR7es plugs. Denso coil on plug system. Ill get a trigger scope at idle and 3000rpm before I try new CAS. Quote Link to comment Share on other sites More sharing options...
ozyvr4 Posted August 15, 2020 Author Report Share Posted August 15, 2020 I think I found problem. The relay for CAS/ISC and BCS was not pushed all the way home. I had it out a couple months ago testing circuits. It must have wiggled enough to loose contact intermittently. I pushed all the way home and test drove this morming for over an hour and no spikes. Im confident its sorted. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.