mikey4410 Posted July 12, 2013 Share Posted July 12, 2013 (edited) Fuel pressure at idle with vacuum line on is just under 50 psiIdle air fuel is 11.2Crusing at 2,000 rpm 11.7When i put me foot down air fuel goes up to 13. Odd then gradually goes back down after a while but not loads till 11 at wide open throttle.To me this done seem right really ? Edited October 30, 2013 by mikey4410 Quote Link to post Share on other sites
TurboTobz Posted July 12, 2013 Share Posted July 12, 2013 14.7 idle 11.6 ish wotIs your lamda unplugged or anything Quote Link to post Share on other sites
mikey4410 Posted July 12, 2013 Author Share Posted July 12, 2013 Lamda sensors plugged in defo.wires not great on the top of it though.could this be the cause maybe ? The thing that worrys me is that when flooring takes ages to get to air fuel of 11.0 .at like 5 or 6 grand.surely should be makig fuel dive down alot sooner?Running standard boost atm with decat,third runner ported,standard exhaust Quote Link to post Share on other sites
Weyro Posted July 12, 2013 Share Posted July 12, 2013 (edited) with vacuum line off at idle it should be 34psi for standard boostfor 1bar boost it should be at 44psi Edited July 12, 2013 by Weyro Quote Link to post Share on other sites
RobSR Posted July 12, 2013 Share Posted July 12, 2013 14.7 idle11.6 ish wotIs your lamda unplugged or anything ^ This. Still running a standard ecu? Have a FCD fitted atal? Quote Link to post Share on other sites
mikey4410 Posted July 13, 2013 Author Share Posted July 13, 2013 (edited) not going over standard boost at all atm.only 7 psi.Standard ecu.Fueling is way of and it was with the standard fpr also im sure.I have fitted a brand new walbro 255 just the other day Edited October 30, 2013 by mikey4410 Quote Link to post Share on other sites
TurboTobz Posted July 13, 2013 Share Posted July 13, 2013 Is the FCD set to 12 and what's your fuel pressure Quote Link to post Share on other sites
5T4R7ET N/A Posted July 13, 2013 Share Posted July 13, 2013 make sure you get the reading when the engine is fully up to temp. because the reading you are giving are when engine is cold. idle cold start AFR : 11.5 idle fully warm AFR: 14.6-15.5 cruising AFR : 14.2-16.2 depending on throttle lift off throttle when in gear: no reading Quote Link to post Share on other sites
RobSR Posted July 13, 2013 Share Posted July 13, 2013 (edited) I have a fcd fitted but not going over standard boost at all atm.only 7 psi.Standard ecu.Fueling is way of and it was with the standard fpr also im sure.I have fitted a brand new walbro 255 just the other day Bet its the FCD. For the sake of piece of mind seeing as your under fuel cut, take it off and see what happens to the AFR's. Probably your problem Edited July 13, 2013 by RobSR Quote Link to post Share on other sites
mikey4410 Posted July 13, 2013 Author Share Posted July 13, 2013 Ok ,will do,cherrs guys alot for your help.will let u know Quote Link to post Share on other sites
mikey4410 Posted July 13, 2013 Author Share Posted July 13, 2013 Just out of interest how comes the fcd would be doing this ? Its 100% wired correct.will be removing it tommorow . Quote Link to post Share on other sites
RobSR Posted July 13, 2013 Share Posted July 13, 2013 Because they fudge signals to trick the ecu as to what boost its running thus affecting fuelling. Quote Link to post Share on other sites
mikey4410 Posted July 14, 2013 Author Share Posted July 14, 2013 10.2 idle on cold start up.just removed hks fcd and still the same.gonna wait for it to warm up and let u know what idle at warm is Quote Link to post Share on other sites
mikey4410 Posted July 14, 2013 Author Share Posted July 14, 2013 Adjusted fuel pressure to 34 psi at warm and idles still 11.6. Quote Link to post Share on other sites
Danza V Posted July 14, 2013 Share Posted July 14, 2013 Faulty O2? Check the voltage from it? Quote Link to post Share on other sites
mikey4410 Posted July 14, 2013 Author Share Posted July 14, 2013 Also if i remove lambda sensor at any time nothing happens at all..... Quote Link to post Share on other sites
RobSR Posted July 14, 2013 Share Posted July 14, 2013 Got any readings driving it yet? Quote Link to post Share on other sites
Danza V Posted July 14, 2013 Share Posted July 14, 2013 I had two go on mine at the same time and yes nothing changed, but it was over fueling like a turd. I would have though if you take it out I would have thought it wouldn't run at all well.. :/ Quote Link to post Share on other sites
5T4R7ET N/A Posted July 14, 2013 Share Posted July 14, 2013 Also if i remove lambda sensor at any time nothing happens at all..... might need a new one because im sure it should make some difference. Quote Link to post Share on other sites
mikey4410 Posted July 14, 2013 Author Share Posted July 14, 2013 cool,well thanks as always for your inputs,will get one oredered up tommorow and get a new one fitted up. i thought aswell that it would make a difference if theres an issue with the lambda and its doing nothing the default as a safety precaution with toyotas is usually to play it safe and over fuel isnt it ? this is what i gather from stuff i have heard Quote Link to post Share on other sites
AdamB Posted July 14, 2013 Share Posted July 14, 2013 Tbh I don't think the lambda sensors do very much on these engines. Worth a swap though. Whats your setup? If your still running stock boost pressure just run the stock fuel pressure 2.4 bar/34 psi. It's best to run rich slightly, but not too much or you'll get bore wash. Quote Link to post Share on other sites
RobSR Posted July 14, 2013 Share Posted July 14, 2013 Might be worth resetting the ECU also now the FCD is off.... Quote Link to post Share on other sites
mikey4410 Posted July 14, 2013 Author Share Posted July 14, 2013 did reset ecu aswell afterwards. did turn the fue pressure to 34 as i said above and it did nothing and i am pretty sure it should have affected it slighty.it running very rich at idle ,not just a bit.somethings not right Quote Link to post Share on other sites
5T4R7ET N/A Posted July 14, 2013 Share Posted July 14, 2013 if you did reset the ecu give it some time, it takes a few miles for the it get fuelling right. but replace the lambda sensor anyway. Quote Link to post Share on other sites
TurboTobz Posted July 14, 2013 Share Posted July 14, 2013 Tbh I don't think the lambda sensors do very much on these engines. Worth a swap though. Whats your setup? If your still running stock boost pressure just run the stock fuel pressure 2.4 bar/34 psi. It's best to run rich slightly, but not too much or you'll get bore wash.You'd be surprised it made a lot of difference without mine on, afrs were all over the shot Quote Link to post Share on other sites
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