KaeptnNemo

Thanks you all for your help! I found it! I found, that there was no ground at J3C6. Someone gave me a hint, that that wire goes to the top of the gearbox housing. So I removed the heat shrink and…. Tadaaa! Ground wire was torn!

That’s what I discovered as well. ECM controls the ground connection of the injectors and they are powered by the fuel pump relay! Interesting point. Hopefully I find some time tonight for checking that!!! Patrick

Hey Jacques, I did not renew the braids, but I refitted them. I replaced the fuel pump, but that does not seem to be the problem, as there is fuel at the rail. Battery is not a year old und is on a battery conditioner right now. i think, the flickering fuel pump relay is a clear sign for a contact problem. So I opened all connections and used Contact Spray on it. It’s drying right now, before I reconnect everything. I’ll give it a try tonight or tomorrow. As I said, the CEL was not blinking 12 when in diagnostic mode, but only a short pulse and then steady light. Possibly I did the diagnostic wrong because of a misunderstanding. I bridged the diagnostic line only for one second but reading the procedure again and again, it might be, that the bridging needs to be permanently for the time of diagnosis. I am going to try that out as well! Stay tuned 😉 Patrick

I just read a thread in the parallel forum about a flickering fuel pump relay, which was a problem of a loose ground connection to the transmission housing. That really sounds all more like a connection problem (even because I lowered the engine, maybe something ripped off or got loose). I’ll investigate on that and let you know!

Hast du Kontaktdaten zu Lotus Engineering? I am wondering how I could check the ECM on the test bench!? supply voltage, ground and then receive serial data from it? or does it need more input before responding?

What if…. there is a small damage in the harness!? A crack, a short…. i guess I am going to measure all wires between the ECU and every point where it should go… next thing, I was thinking about, is the ventilation function. If the throttle is fully open, no fuel will be injected. But that requires, that the TPS is fully open, and it is not… looking forward to it 🤬

I am going to recheck everything. Problem is, that the wiring diagrams do not really help on where which harness should be connected or which plug has no connection, etc... 😕 Hopefully i did not damage one of the harnesses... I am wondering, why the fuel pump relay only gets 5.5 Volts and starts vibrating...

I took the Spark plugs out, and saw them firing. I measured 3.6 bar at the fuel rail. I used a Digital Voltmeter to measure the Injector Voltage, but there was not pulsing any Voltage, neither at the Injector nor at the Connector on the ECU.

I guess TECH1 should do the same job. And it did before... But I cannot read any data or codes.

Hey guys, I need your help, I am absolute dersperate... I changed the fuel tanks on my 92 Esprit SE HWing, because they were rusty. After puttinh everything back together, the engine won't start. There is a spark on each cylinder, the fuel rail has enough pressure, but it looks like, the injectors do not open. What went wrong??? What I did: I opened all electrical connections on the right hand side. Obviously, I took to few pictures, so I am not sure about the electrical connections. There are quite a lot plugs, that do not have a counterpart or are connected to anything. Please confirm, that this is normal. I tried to access teh ECU via TECH-1, but i cannot get any data out of it. Even no battery voltage (which is definitely there at the ECU, mesaured by Voltmeter) can be read out. Trying the fied diagnostic mode, the check-engine light blinks once after bridging the ALDL-Connector and then stays lit. I have no idea, what else I could check. My guess is, that one connection is wrong or missing. Is the ECU so sensitive, that it could have gone to heaven for some reason? Any advice appreciated 😕 Patrick

The car looks similar, but it’s not the right one! Different mirrors (not black)and some plastic parts at the front wheel are missing! But thanks for the hint! Patrick

Hey guys! strange question, but I hope someone can help! i took a screenshot from a video (I believe on YouTube) for my desktop wallpaper (the properties say on June 22). Now my wife saw this and also wants a wallpaper like mine, but of course not the same! can anyone tell me, in which clip I extracted that picture???? i guess it was in one of the linked videos here, but I couldn’t find it again! thanks in advance for any helpful comment ! patrick

Hello! Yes, I saw the excerpt from the Lotus club, that’s the reason, I was interested in getting the original papers ( or digital copies). I think someone of the experts here might have them! Cheers, Patrick

Hello! Can anyone tell me, where to get the Service Bulletins from Lotus? There should be one „1995/06“ concerning information about changing from R12 to R134a. any help appreciated! Cheers, Patrick

Now it hit me! My condenser is leaking and I am considering to replace the whole radiator package. i just dropped them a mail and hope to get an answer! I will keep you informed ! Patrick