TVR S2 Ignition Coil

[HugoS2]

Hello!

I have experienced several issues with my 1990 TVR S2 2.9 theese days: weird speedo, burned fuse... I think this is caused by my ignition coil. It is a completly blanck coil, so I don't know at all what it was.
I have changed it with one I had in my garage (stupid idea), a Bosh Blue coil, 12 Volts, reference 0 221 119 027. My speedo is now working fine, the car starts on key, but I have now some rattles when the car iddles. I think this coil isn't the right one.
I have ordered two new coils, thinking that one of then would fit, given for the Sierra 2.9:
- BERU ZS566, 12 volts
- BOSCH 0 221 122 450, the red coil, 14 volts...

The bosch is given as a substitute for the Motorcraft 102 72 83, but I wold like to be sure that it'll work... Any opinion about that?

[phillpot]

Your Black coil is quite likely to be the original Motorcraft/Ford coil.

From the vehicle applications I can see for your Blue coil it does not appear to be suitable for an electronic ignition system?

I've found a supplier for the Beru but no details or application list?

The Bosch 0 221 122 450 should be okay I reckon?

[HugoS2]

Hi Philpot,

Thanks for your answer. The coil I had on the car was silver. It looks like a Lucas.
Is there a difference between à 12 volts and a 14 volts? Is one of them gone burn my electronic ignition?

[MisterTee]

I had to replace the coil on my S3 shortly after buying it because it was hesitant and misfired something terrible if it got too hot under the bonnet.

I bought one of these - looks a bit unconventional but does the job very well and never had a problem for the last 3 years - I was told that it is a direct replacement for the original wet coil Lucas DLB 125

Andy

[HugoS2]

Hi Andy,

I was about to order this one, but the shape was weird si I tought it was not the good one...

Kind Regards,

Hugo

[MisterTee]

Hi Hugo

Yes, it does look a bit unconventional for a coil, but does the job perfectly.

I’m led to believe that this ‘dry’ type will be more reliable than the ‘wet’ oil filled coil, but am certainly no expert in this field.

Andy

[phillpot]

MisterTee said:

I’m led to believe that this ‘dry’ type will be more reliable than the ‘wet’ oil filled coil, but am certainly no expert in this field.

That's bad news, do you reckon my 28 year old coil could go "bang" any day now

[MisterTee]

phillpot said:

MisterTee said:

I’m led to believe that this ‘dry’ type will be more reliable than the ‘wet’ oil filled coil, but am certainly no expert in this field.

That's bad news, do you reckon my 28 year old coil could go "bang" any day now

That’s it now .. probably jinxed it

[glenrobbo]

In all of my 70-odd years, and many many cars owned or worked on, I have only ever once replaced a conventional oil-filled coil. And that was only through sheer desperation to try to eliminate the cause of an intermittant fault on a VW Polo. The coil was not the problem.*

So yes, they are unreliable.


* The problem was actually bits of sellotape in the fuel tank drifting around and clogging up the fuel strainer at the pump pick-up pipe whenever there was suction. It was invisible floating about in the fuel, and only came to light when I removed the the tank and emptied it into a container. For a while, that one had me going nuts!
The previous owner had part ex'd that Polo for a people carrier I was selling due to his expanding family.
I hope his mischievious kids didn't stuff bits of sellotape into that car's fuel filler!

[HugoS2]

Well.... I finaly went for a Bosh, made for transistorised ignitions, the engine runs better, but I still have misfires at low RPM...
MisterTee, could you give me the reference of your Lucas Coil? I'll try that one too. It both of them doesn't work, I'll know it's not that.

PS: Do you think that the Spark Plugs could be the cause?

[phillpot]

HugoS2 said:

PS: Do you think that the Spark Plugs could be the cause?

No, I'd just keep trying every different make of coil you can find, you've got a few to go at yet


Could be plugs, have you had a look at them?

Could be plug leads

could be distributor cap

could be rotor arm

could be ...............

[HugoS2]

The fact is that the car was fine before I had coil issues...

[phillpot]

Fair comment but how many coils are you going to try before considering you may have disturbed something (lot of wires and connectors in that area) while changing it?

HugoS2 said:

I have ordered two new coils, thinking that one of then would fit, given for the Sierra 2.9:
- BERU ZS566, 12 volts
- BOSCH 0 221 122 450, the red coil, 14 volts...

Same symptoms with the Beru?

[HugoS2]

I have canceled the Beru. I have already checked all the loose connections. My HT Leads are brand new, made of Silicone.

[MisterTee]

HugoS2 said:

Well.... I finaly went for a Bosh, made for transistorised ignitions, the engine runs better, but I still have misfires at low RPM...
MisterTee, could you give me the reference of your Lucas Coil? I'll try that one too. It both of them doesn't work, I'll know it's not that.

PS: Do you think that the Spark Plugs could be the cause?

Yes, of course it’s a Lucas DLB125 ... try this link. This is where I got mine.

Andy

https://www.autoelectricalspares.co.uk/lucas-dlb12...

[Barkychoc]

Don't assume because something is new it can't be faulty.

[HugoS2]

I have received the DLB125 and fitted it to the car. It was that. The Lucas coil work perfectly and the car now runs great! Thanks a lot for your help!

[phillpot]

HugoS2 said:

Well.... I finaly went for a Bosch, made for transistorised ignitions, the engine runs better, but I still have misfires at low RPM...

The one you mentioned initially, the 0 221 122 450 ?

there's no logical reason why that one shouldn't have worked perfectly Do you suspect you were sold a faulty one?



good news you're now sorted with your Long Life Lucas jobby