Anastasios Kazazis Posted March 22, 2020 Report Share Posted March 22, 2020 Hi When the engine is cold & I try to power on the engine the idle cannot be stable and after ~5 secs the engine is off. If I press the pedal of accelerator during the engine power on and after two-three times the engine works properly &stay on. That time the value on wide band is about ~ 13.5 for few secs & after a while is going 14.7. Does anyone have any idea what I can check on the ECU settings? Quote Link to comment Share on other sites More sharing options...
Rossobianconero Posted March 22, 2020 Report Share Posted March 22, 2020 Hi, Post your rom and a datalog, so we can check. Regards Quote Link to comment Share on other sites More sharing options...
Anastasios Kazazis Posted March 23, 2020 Author Report Share Posted March 23, 2020 Hi Thanks for your help, please check attached the latest ecu rom and the datalog Quote Link to comment Share on other sites More sharing options...
remski2 Posted March 24, 2020 Report Share Posted March 24, 2020 Seems like you need more fuel. AFRs are dropping to 17 and engine is cutting off. From what I see the only reason it runs again is because "Post Start Enrich" seems to go up instead of down.. (which is odd) Quote Link to comment Share on other sites More sharing options...
Anastasios Kazazis Posted March 24, 2020 Author Report Share Posted March 24, 2020 Hi remski2 Thanks for your help and fast reply, the problem is that when I see when the engine is finally power on, the AFR is about ~13.0 for 15 seconds and with 1200 rpm. How much more fuel, it needs to stay on ? I was wondering if there is something wrong configured on ignition or on intake throttle If in port start enrichment table , i will increase the values of 10 and 20 deg from 26 and 21 to 36 and 31 could be better? Quote Link to comment Share on other sites More sharing options...
remski2 Posted March 24, 2020 Report Share Posted March 24, 2020 Start by adding 10% in your fuel map. Your post start enrich should go to 0 , then your warmup enirichment should kick in and eventually go to 0 once the operating temperature is reached. (look at the image attached .. its from Link manual) Depending on engine but I keep my AFR around 13.5 for post start and warmup, tapering off to 14.7, once either your 02 correction kicks in or you reach your normal operating temperature. Post start enrich table is Coolant temp vs. % of additional fuel. The Help section has a nice write up as to what happens in steps. Quote Link to comment Share on other sites More sharing options...
Anastasios Kazazis Posted March 24, 2020 Author Report Share Posted March 24, 2020 Hi remski2 I followed your suggestion and i increase the post start enrichment table as below Now the engine start up is much more better than before, it works properly. I will check one more time tomorrow morning where the temperature will be for sure low and then I will leave it as it is. Thanks again for you help Quote Link to comment Share on other sites More sharing options...
remski2 Posted March 24, 2020 Report Share Posted March 24, 2020 To me it looked like you need more fuel in the main fuel table. Than again, your log does not extend to normal operating temperatures. Glad it helped. 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.