Coil base plate,S4 1993.5

[stevefh]

Hi all, I have replaced the o/e coils with the MSD 8224, but what is inside the base plate and is there a replacement compatible with the MSD version. On the back of the base plate is.  

1049

0H13   00022.   Thanks for any help.

 

[tomcattom]

I don't know exactly what is in the baseplate but as I recall there aren't any replacements available and the OE one is specific to the Esprit, so replacements are hard to come by. Given that and the fact it's a sealed unit of sorts, I didn't want to try taking it apart to investigate further when I fitted the 8224's to mine.

[Chillidoggy]

Just now, tomcattom said:

I don't know exactly what is in the baseplate but as I recall there aren't any replacements available and the OE one is specific to the Esprit, so replacements are hard to come by. Given that and the fact it's a sealed unit of sorts, I didn't want to try taking it apart to investigate further when I fitted the 8224's to mine.

It’s the DI Module. They are available from SJ. now.

[tomcattom]

Good to know they're available again. Luckily mine was okay when I fitted the MSDs on mine.

[stevefh]

Hi Ian, I can see SJ listing of the coils and backplate as a unit, not just the backplate for those of us who have recently bought the MSD 8224 coils.Have I missed it?

[tomcattom]

https://www.sjsportscars.com/parts-and-accessories/SJ910E0068.htm

[stevefh]

Thanks Tom, no idea how my search failed to show that.What about my question what is inside it? Anyone know?

[tomcattom]

Someone on here has posted some photos of the inside of the DI module on the forum quite some time ago, but can't find that thread at the moment.

[Chillidoggy]

Google is your friend.

[MrDangerUS]

Base plate is a GM AC Delco Ignition Module ,  D1927A

Other Part Number/Interchange Part Number:

LX345,10467214, 10499427, 10499794, D1911A, D1927A

Plenty on eBay!

Ignition Module

AC-Delco

D-1927A

Fits 1987 Chevy Beretta, Cavalier, Corsica 2.0L FI

[Chillidoggy]

From a post I made in October 2017, and the module I bought was a D1927A:-

The D.I. module remains a mystery, and there's a lot of different types out there. @sailorbob and I spent a long time trying to identify it, but unless he's had a eureka moment, or some good luck recently, from memory we only managed to decide which version it wasn't, rather than what it was. It could be Lotus-specific, but not sure. I even bought what we thought might be the correct version and fitted it, but while it worked perfectly, it triggered the CEL. From our research, that is what happens on every one of them, and as the originals are NLA from Lotus, they could be a problem in the future.

 

[fjmuurling]

The Lotus version of the above module has one extra signal coming out of it which is the engine speed. This is send to the ECU over pin B of the 6 pin connector which is the connection marked with "None" on the picture above.

[Chillidoggy]

And that’s why there’s a CEL lamp when a non-Lotus specific DI module is fitted.

I’m pretty sure Derek also mentioned about batch firing of injectors, but he’d have to confirm that.

[Barrykearley]

9 hours ago, fjmuurling said:

The Lotus version of the above module has one extra signal coming out of it which is the engine speed. This is send to the ECU over pin B of the 6 pin connector which is the connection marked with "None" on the picture above.

Has anyone looked at rerouting this signal from elsewhere? Is this just an rpm signal?