Registered Nutter Posted December 3, 2001 Share Posted December 3, 2001 Since putting optimax in my j-spec i have noticed that the Idle RPM has raised to 1200 - 1500 rpm. I started using optimax just after i had my EGT Guage installed. I was wondering how high exhaust gas temperature should be reaching as it seems to be rather high even with the boost controller turned off, sitting at about 800 while cruising at 80 in sixth. whereas before using optimax i seem to remember it was about 700. any ideas how to lower temp and if it is optimax related. I will be getting a FMIC in the new year & currently saving my pennies for it but i dont want to cause any damage before then. Quote Link to comment Share on other sites More sharing options...
Steve Cargill Posted December 3, 2001 Share Posted December 3, 2001 Have you reset your ECU since changing to Optimax? I had the same idle 'problem', and since resetting the ECU it has been normal. Quote Link to comment Share on other sites More sharing options...
Registered Nutter Posted December 3, 2001 Author Share Posted December 3, 2001 No i havn't how do i go about doing that? and did you notice a increase in the egtemp? Quote Link to comment Share on other sites More sharing options...
Steve Cargill Posted December 3, 2001 Share Posted December 3, 2001 Have a look at http://www.mkiv.com/techarticles/ecu_reset/ecu_reset.jpg for resetting the ECU. It may be a little rough for a couple of minutes afterwards but will soon settle down. As for EGT, I don't have a gauge, suppose I could go for a run and grab the exhaust for 5 seconds and measure the size of blister :o (only kidding, please don't try that at home) Quote Link to comment Share on other sites More sharing options...
Registered Nutter Posted December 3, 2001 Author Share Posted December 3, 2001 will try that in my lunch break. When you say rough what exactly do you mean? Quote Link to comment Share on other sites More sharing options...
Steve Cargill Posted December 3, 2001 Share Posted December 3, 2001 Idle may be a little uneven and it may not pull smoothly. It clears very quickly. Quote Link to comment Share on other sites More sharing options...
Registered Nutter Posted December 3, 2001 Author Share Posted December 3, 2001 Well thats worked a treat egt seems to be just under a hundred lower at about 80mph & ticks over about 500 - 700 rpm. Quote Link to comment Share on other sites More sharing options...
Steve Gee Posted December 4, 2001 Share Posted December 4, 2001 EXCELLENT!!!!! I've been running on Optimax exclusively for about two months. After having reset the ECU as described above, it's smoother and quicker!!! Isn't the web wonderful? Steve Quote Link to comment Share on other sites More sharing options...
Simon Posted December 7, 2001 Share Posted December 7, 2001 I always thought that the ECU would learn the new fuel after about 50-60 miles anyway, so pulling the ECU fuse only speeds up this learning process. If you've been running for some time on Optimax, pull the fuse now shouldn't make a difference. Or so I thought? Quote Link to comment Share on other sites More sharing options...
Registered Nutter Posted December 7, 2001 Author Share Posted December 7, 2001 I had been running on optimax for about 700 miles Pulling the fuse defiantly made a difference. Quote Link to comment Share on other sites More sharing options...
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