evilscorp Posted September 22, 2018 Share Posted September 22, 2018 Just back from a quick drive to domino's (new to the area and too far that they won't deliver). On the way there I was driving quite quickly and 1 mile before I stopped to pick up my pizza I did a fast corner around a round about (wide sticky MPSS with reasonable areo so the car corners well!) then slowed down to join traffic. After picking up the pizza the car started ok but seemed a bit juddery, after pulling out to return home the car started to loose power dramatically, I thought I was going to conk out at the side of the road, the A/F was reading off scale lean (not driving fast since leaving domino's) then after 20-30 seconds the car was fine again A/F=14.5, I only have one bank A/F gauge (need to get another) but I am now worried the car has a big issue. I will do a compression test and check my spark plugs (and fix a boost leak I am sure I have) but is it probably likely to have been fuel starvation? I've never experienced it before so I can't determine what it would be like. Thanks. Fuel setup is 600cc detchwerks injectors, walbro 255pump, fuel return system. (if it matters) Quote Link to comment Share on other sites More sharing options...
Ekona Posted September 22, 2018 Share Posted September 22, 2018 Very very unlikely, fuel starvation usually happens at high G when cornering, not afterwards when you’ve stopped and started again. Something else going on there methinks. Quote Link to comment Share on other sites More sharing options...
350Butcher Posted September 22, 2018 Share Posted September 22, 2018 Definitely not fuel starvation on the road on road tyres no matter how fast or how well you took that corner! High grip, high G and low fuel levels required for that to be a problem. Hope the issue is nothing serious though...........sounds like an odd one. Quote Link to comment Share on other sites More sharing options...
evilscorp Posted September 22, 2018 Author Share Posted September 22, 2018 Thanks guys, might try opening the bonnet and have someone Rev the car so I can check the fuel pressure is staying stable, don’t think I could put a multimeter on the fuel pump. Not going to drive it until I find something wrong. :-( Quote Link to comment Share on other sites More sharing options...
davey_83 Posted September 23, 2018 Share Posted September 23, 2018 If you have a fuel pressure gauge in the engine, just remove the vaccum hose from it to see what fuel pressure you're getting at wide open throttle. Also check for fault codes in the ECU. Quote Link to comment Share on other sites More sharing options...
nissanman312 Posted September 23, 2018 Share Posted September 23, 2018 Could quite easily have been fuel starvation Mine used to do it round a good right hander with half a tank How much fuel did you have in I have a protec swirl pot now it plauged me in Europe Quote Link to comment Share on other sites More sharing options...
evilscorp Posted September 23, 2018 Author Share Posted September 23, 2018 37 minutes ago, nissanman312 said: Could quite easily have been fuel starvation Mine used to do it round a good right hander with half a tank How much fuel did you have in I have a protec swirl pot now it plauged me in Europe Only had a quarter Left in a JDM smaller tank. I had no lights appear on the dash but I will plug in my reader. Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted September 23, 2018 Share Posted September 23, 2018 Gary, If your issue is fuel related then I would be looking at the fuel syphoning system. If this is not functioning properly then a quarter tank on a sharp/fast right-hander will cause severe lean out. Keep your tank at least half full and see if the issue returns. 1 Quote Link to comment Share on other sites More sharing options...
nissanman312 Posted September 23, 2018 Share Posted September 23, 2018 (edited) 9 hours ago, evilscorp said: Only had a quarter Left in a JDM smaller tank. I had no lights appear on the dash but I will plug in my reader. It's a massive issue on the 370z It happend to me on the stock car Since litchfeild mapped mine for forced induction the cut was violent as they mapped a fail safe in. it will just shut the ignition/throttle off should it see lean running it's horrible but saves it running lean on full chat Swirl pot sorted it tho As Alex says experiment with different fuel levels and see what gives Just play on light or almost no throttle tho so it's not on full chat if problem returns Edited September 23, 2018 by nissanman312 Quote Link to comment Share on other sites More sharing options...
evilscorp Posted October 3, 2018 Author Share Posted October 3, 2018 First time i've used the car since the issue, I had my dad rev the car while I looked at the fuel pressure gauge on the regulator and it seemed fine, raised slightly when rev'd as expected with a rising rate regulator. I also remembered I have a fuel pressure/oil temp gauge sitting in the loft and one of the two pillar pod gauge holders. Sadly the sensor is 1/8 bsp and the regulator hole (I think, stated on aeromotive website) is 1/8 npt. So I have ordered an brass adapter, but I swear the gauge that's on the regulator needed ptfe tape as it was tapered. Anyway should be able to monitor things soon and back to driving it once in a blue moon. Quote Link to comment Share on other sites More sharing options...
Ekona Posted October 4, 2018 Share Posted October 4, 2018 If it hasn’t happened since, I’d just ignore it and put it down to randomness. No point chasing a fault you can’t replicate imho, not when everything else looks correct. Quote Link to comment Share on other sites More sharing options...
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