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Jed_dc2

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  1. It wasnt the wideband controller. After discussing with my tuner the only logical/plausible explanation we can come to is that the very first map sensor I bought was faulty/off compared to the subsequent 3 replacements I bought. When tuned on the first one it was good but for whatever reason the next 3 are different.
  2. Since I last posted I have replaced the fuel pump, fuel filter, flow tested the injectors and tried a replacement ecu. Also used multiple replacement map sensors incase one was faulty and its still not the same as it used to be. Could I have damaged the wideband controller when I connected 12v to the 5v wire ? LD performance controller 12v, ground then 0-5v into ecu expansion loom
  3. My gauge is accurate Tried another gauge today they both read 3 bar. The only way my electronic sensor matches this is with the 300psi sensor calibration if I used 150PSI cal it shows 1.5 bar on the laptop. Edit. I had a look and found another 150psi Sensor that calibrates with the 150psi Cal and matches the 3 bar on the gauge again.
  4. It is possible yes however I think its unlikely as its hardly been used but I have a new one on its way to me to compare.
  5. I think The fuel pressure sensor I got sent is 300psi as with the 150psi calibration it read half what I set fuel pressure to on a mechanical gauge. My dyno log is on a different sensor from yesterday just to be clear. Log and tune from yesterday is where Im at now. I altered sensor calibration to match gauge, 300psi calibration and the values in PClink doubled. I have always set fuel pressure by testing pump output and adjusting the regulator to 3 bar. It has always been tuned this way. I have other logs it driving like this with CL +/-4%. The gauge I use for setting pressure maybe gets used 3 or 4 times a year maximum but I will get another to compare. My tune is traditional mode I did not think the ecu would be looking at the fuel pressure other than it being a parameter for logging ?
  6. Ok thanks, I have something to go off now. Its all a couple thousand miles old and branded stuff AEM reg DW300 pump will give it a check over.
  7. It was fully tuned very recently and was running and driving great, fuel pressure was set checked and set same as it always has been at the weekend. I will double check vaccum line to regulator. Edit. Vaccum line is good Edit 2. Could a dying or faulty fuel pump be causing what you called a strange fuel supply ? looking at older logs the fuel pressure and differential pressure look different from todays log. I can only apologise for jumping to conclusions about ecu this very much felt like an ecu problem based on passed experience but looking at logs I do agree differential fuel pressure does not look right compared to when it was running good. The differential fuel pressure is much more flat and consistent in the older logs like from the dyno earlier in the thread.
  8. Drove to work this morning and was it idling at 17AFR had to add another 15% to the master fuel value. Even still was going lean and closed loop corrections are all over the place compared to logs from a couple weeks ago. 2206.llgx 2606 drive home.llgx
  9. would that suggest something is wrong with the map sensor then ? it was brand new from speedfactory racing less than a week ago and done zero miles since. Edit Yes the brand new map sensor was at fault I changed to a different 4 bar sensor I had and car seems to start and run on old master fuel value.
  10. The fuel pressure sensor calibration problem has been fixed, the last 2 sensors I got were supposed to be 150psi but they calibrate to the gauge using the 300psi calibration. I reluctantly tried adding some fuel to the master fuel value and it did seem to start stronger then would hunt for a bit then die. could my idle ignition control have anything to do with this ? I recently enabled it but never had problems staring before. I have attached logs and tune from today. Just to explain again so I am 100% clear this was a fully running and driving car tuned less than 1 month ago that now does not run and appears to need more fuel for reasons I dont understand. I am not tuning around the problem with a new master fuel value as a long term solution as that is absurd in my opinion.
  11. could I have damaged the 5v supply when I connected the 12V wire or damaged anything else ? Bottom line is my car does not run on a previously proven calibration after this happened.
  12. voltage on the signal wire matches voltage on the laptop during fuel pump test but pressure does not match the gauge. The recommended sensor calibration was slightly different from the one I was using so I changed it and it now reads half what the gauge does so no further forward. so you think its unlikely I damaged the ecu by connecting the 12v and 5v wires ?
  13. Yes sensor on original tune was correct and pressure was set at 3bar as per data for injectors. I have since tried 2 direct replacement sensors after connecting a switched 12v to the 5v signal wire and they both read 1 bar less than the gauge does so I think something is up with ECU as its unlikely to get 2 sensors with same fault. What is procedure for repair in the UK ?
  14. My new fuel pressure sensor was faulty After checking with a gauge fuel pressure was closer to 4 bar. I have reset to 3 bar on gauge and confirmed new sensor is 1 bar out. Will check injectors for 12v then what next ? Im not really wanting to tune around the problem as it ran on this calibration before.
  15. I will check sensor with gauge to confirm and check for 12v at injectors. do you think I will need to send it back to link ? Used to cold start great. Im not tuned in VE mode those are not VE values. Lambda is up and down because it has not warmed up yet.
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