EDIT - this was sitting in my drafts - from a couple weeks ago! Problem turned out to be a poor connection on the ECU coolant temp sensor causing the car to flood. When I checked the temp sensor resistance value back at the ECU, it was way off...jiggled connector and it "came good"...jiggled again and it was off. Anyway, a zip tie to hold the connector pre-loaded a bit seems to have cured it for now! Car is back home safely tucked away with the ES.
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Well, the car let us down this week. Wayne was taking it down to his mum’s and it wouldn’t start, so I reached my hand up behind the glove box and fiddled with the fuel pump relay and it finally started (coincidentally I believe)...he made it down there and the car sat for a couple hours (ran fine on the trip). Then I get a call “car won’t start” to which I replied “time to buy a Tesla”...anyway, next day we drove down and I did some troubleshooting. First pulled the codes (LH2.4) and got only one - 2-3-2 “Fuel trim (lambda control) too lean or too rich at idle fuel mix out of spec rich/lean at idle”. I tried to start it and on the first crank it fired up but then died almost immediately. Tried cranking again and nothing. Strong petrol smell out the tailpipe, so I pulled the plugs and they were wet with fuel. I pulled the fuel injection/pump fuses and cranked it a bit with no plugs and we let it sit for a bit, and dried plugs. Reinstalled everything and finally got it started but ran very rough until it finally cleared. Oil smells a bit of petrol as well so time for oil change. The car drove home fine. Just thinking what it might be, and my plan is:
1) check ECU coolant temp resistance at ECU...note it is a new temp sensor so odd that would fail.
2) check fuel pressure. Vintage 1993 B230FX fuel pressure regulator; no fuel coming out vacuum/boost reference hose.
3) wondering whether the injectors I used are too high flow rate, causing flooding at low ambient temp? Note they’re only a tad higher flow rate than the original B230FT injectors that would have been used with these turbo ECU/EZKs.
4) swap spark plugs out for a set of NGK BPR7ES that my dad sent over. I think the original plugs should be BPR6ES...but the 7 may be OK for testing? The plugs I have in there are NGK Iridium...you’d think they would be OK. New cap, rotor and plug wires when I did the rebuild FWIW.
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