Hi folks, going to put as much detail as I can in here and hope someone can help. - Already posted on E36Coupe, but they're an unhelpful buch of... Erm. Hi!
Fitted M52B28 into my E30 a few months ago. Yes, it goes like a cat with 2 rockets up it's bum...
Donor car was crash damaged and had sat for some time with battery disconnected. - Started fine when reconnected. 2nd time we tried to start it, ignition position 3 (crank) didn't do anything. Locked it all back up, retried. Started fine, thought nothing else of it. - Seller said it was the first time this had happened.
Whole assembly was removed, rewired and reinstalled in the E30. Started 1st time, and was all beautiful.
A few starts later, I got the same failure to respond. Left it a while, retried, all was fine. - Another time I'd turn to Pos3 to crank and nothing would happen for 1/2 a second, up to 5 seconds when it would suddenly decide it was happy and start turning over. The car would intermittently fail to start maybe every 4th attempt.
A month ago the EWS decided it was no longer happy at all... No amount of waiting or retrying would give the characteristic relay click from the EWS module, signalling that the starter would engage and the DME was happy to run.
I swapped out antenna ring, send/receive module and went through all the wiring very carefully and methodically. All was fine. - Went to BMW, spoke to a technician and he said it was likely to be a broken down transponder chip and that I should replace the key... Another key was ordered, arrived and started the car on the first attempt, every attempt.
Until about 4 days later, when the same non-start occurred. Waited, was fine.
Over the last few weeks the same degraded service from the key has been experienced. Exactly like before... This morning I drove to work, an hour later I drove to get some breakfast... Got back in the car with breakfast and failed to start. Have checked wiring again, even tried the old transponder chip. Nothing.
I'm quite familiar with the electronics (having done the swap and wired in the EWS) and the problem is definately not with the starter motor, crank position sensor etc., as I've seen mentioned in similar threads.
When the EWS accepts the key as valid it confirms ISN with the DME and enables injection and ignition in the DME. It also completes the starter circuit, which comprises the audible relay click. As I'm not getting the click, it's pointless searching for faults any further than the EWS-II system.
It's really odd that this has occurred with subsequent keys in exactly the same way over roughly the same time period/number of starts. I seem to recall there are 10,000 rolling code combinations, but is there anything that might run out of combinations after 50-100 vehicle starts? Nothing changed between starting the car successfully and total EWS lockdown on both occasions.
Does anyone understand exactly what an EWS alignment does, have access to GT1/DIS, or have any further information on EWS-II that might account for something I'm missing? Can the code tumblers be reset, or can CarSoft 6.5 align/read key whitelist etc.?
Huge thanks in advance!
p.s. - Jan '96 built 328i Sport (manual) if req.