sqd
07-08-2013, 04:19 AM
This is going to take some explaining, so please bear with me here, since I'm stumped.
S14, SR20, ID2000, E85, Link G4 ECU, Walbro 450 lp/h pump, Fuelab FPR, stock lines & Z32 fuel filter - those are the relevant parts here I think.
The battery is in the trunk, the pump is wired to a relay in the trunk as well.
Engine was just built, so this is with the base map, slightly adjusted for better idle etc, so this is just me starting to drive the car. I've started it and let it idle a few times prior to this, with no issues.
So yesterday, I'm going to take it out on the road for the first time, and try getting on some boost to see what happens. I let it idle for like 20 minutes, and it's hot out, so it gets warmed up quickly etc. Take it out on the road, do an easy pull to get up to about .5 bar/7-8 PSI in second gear, no problem. Throw in third goes well at first, but then it cuts out, like dies as if I turned the ignition off.
I clutch, rev and it is alive, but this happens all the time now - when I drive with a steady throttle, it does this - if I keep the throttle at the same position, nothing happens, I have to take my foot off the pedal, and throttle again. Sometimes it does "come back" if I don't take my foot off, it's just random.
Go back home, and I immediately see on my AFR-gauge that it's a bit more rich now.. Turn the car off, then turn the ignition back on - the fuel pump keeps priming/running and the relay for it in the trunk, keeps clicking.
I disconnect the pump, and it's still clicking. So I try this - I bypass the relay and connect the pump directly, and now it almost never cuts out - I've taken it up to 1 bar/14-15 PSI without it cutting out at all, but it is running lean instead (14-15 AFR on boost). It will still, sometimes cut out as above, but not as often at all, and not as bad, ie I don't have to clutch kick and rev it, but it still happens, and I don't know why..
The lean on boost may be due to the tune, but then again, the base map should be very safe in terms of richness etc.
Anyone with ideas/help will have my deepest grattitude, and if someone solves it outright, I will f*cking Paypal you some dough! I am really that desperate.
S14, SR20, ID2000, E85, Link G4 ECU, Walbro 450 lp/h pump, Fuelab FPR, stock lines & Z32 fuel filter - those are the relevant parts here I think.
The battery is in the trunk, the pump is wired to a relay in the trunk as well.
Engine was just built, so this is with the base map, slightly adjusted for better idle etc, so this is just me starting to drive the car. I've started it and let it idle a few times prior to this, with no issues.
So yesterday, I'm going to take it out on the road for the first time, and try getting on some boost to see what happens. I let it idle for like 20 minutes, and it's hot out, so it gets warmed up quickly etc. Take it out on the road, do an easy pull to get up to about .5 bar/7-8 PSI in second gear, no problem. Throw in third goes well at first, but then it cuts out, like dies as if I turned the ignition off.
I clutch, rev and it is alive, but this happens all the time now - when I drive with a steady throttle, it does this - if I keep the throttle at the same position, nothing happens, I have to take my foot off the pedal, and throttle again. Sometimes it does "come back" if I don't take my foot off, it's just random.
Go back home, and I immediately see on my AFR-gauge that it's a bit more rich now.. Turn the car off, then turn the ignition back on - the fuel pump keeps priming/running and the relay for it in the trunk, keeps clicking.
I disconnect the pump, and it's still clicking. So I try this - I bypass the relay and connect the pump directly, and now it almost never cuts out - I've taken it up to 1 bar/14-15 PSI without it cutting out at all, but it is running lean instead (14-15 AFR on boost). It will still, sometimes cut out as above, but not as often at all, and not as bad, ie I don't have to clutch kick and rev it, but it still happens, and I don't know why..
The lean on boost may be due to the tune, but then again, the base map should be very safe in terms of richness etc.
Anyone with ideas/help will have my deepest grattitude, and if someone solves it outright, I will f*cking Paypal you some dough! I am really that desperate.