Ignition Amp?

Ignition Amp?

Author
Discussion

Jhcolling

Original Poster:

72 posts

133 months

Tuesday 9th January 2018
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The rotor arm turns, albeit slowly. Ive not disconnected the ignition amp yet and earthed the coil, should I still do this?

Penelope Stoppedit

11,209 posts

109 months

Tuesday 9th January 2018
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Jhcolling said:
The rotor arm turns, albeit slowly. Ive not disconnected the ignition amp yet and earthed the coil, should I still do this?
Ok This is good, the distributor is turning

There is a problem in disconnecting the amplifier and earthing the coil, you can go ahead and do it ***But*** I doubt very much that you will get a good spark, you will very likely get a weak spark as long as you don't give it too much of a gap to jump across - The amplifier helps create the good spark

Penelope Stoppedit

11,209 posts

109 months

Tuesday 9th January 2018
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Did you pull the king lead out of the disributor cap to check for a spark, another poster did mention this earlier, did you also make sure you held the king lead terminal close to a known good engine earth when checking for a spark?

Jhcolling

Original Poster:

72 posts

133 months

Tuesday 9th January 2018
quotequote all
Penelope Stoppedit said:
Ok This is good, the distributor is turning

There is a problem in disconnecting the amplifier and earthing the coil, you can go ahead and do it ***But*** I doubt very much that you will get a good spark, you will very likely get a weak spark as long as you don't give it too much of a gap to jump across - The amplifier helps create the good spark
You have probably guessed you are dealing with a novice here so if I don't get a spark then I cannot be 100% confident i have done the process right in the first place. I think i will go ahead and order an ignition amp and replace it, if the problem is still there then I've lost £30 and have a spare.

A bit more googling says I need a Lucas part and not a cheaper alternative but the only ones I can find are Intermotor and the like. Should I be looking away from the TVR parts suppliers?

Jhcolling

Original Poster:

72 posts

133 months

Tuesday 9th January 2018
quotequote all
Penelope Stoppedit said:
Did you pull the king lead out of the disributor cap to check for a spark, another poster did mention this earlier, did you also make sure you held the king lead terminal close to a known good engine earth when checking for a spark?
I did check yes, it was as close as I could get it without actually touching. I put the king lead here, between the two unused bolt holes.


Penelope Stoppedit

11,209 posts

109 months

Tuesday 9th January 2018
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Yes do shop around, I wish I could be of more help

737 FLF

172 posts

173 months

Wednesday 10th January 2018
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I got a new amplifier from these people and they were very helpful.
New old stock, the genuine Lucas article.

https://www.maes-group.co.uk/

It was quite some time ago but probably worth a phone call.

HTH.




Sardonicus

18,961 posts

221 months

Wednesday 10th January 2018
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They are out there wink this is new old stock before Lucas got rationalised into generic crap, this is embossed and its knowing what a genuine one should look like hehefrownhttps://www.ebay.co.uk/itm/IGNITION-MODULE-DAB127-...

Steve_D

13,747 posts

258 months

Wednesday 10th January 2018
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When you do replace it remember you must apply heat transfer paste to the back of it. If you don't it will very soon go pop.

Steve

Jhcolling

Original Poster:

72 posts

133 months

Wednesday 10th January 2018
quotequote all
Sardonicus said:
They are out there wink this is new old stock before Lucas got rationalised into generic crap, this is embossed and its knowing what a genuine one should look like hehefrownhttps://www.ebay.co.uk/itm/IGNITION-MODULE-DAB127-...
I went ahead an ordered part DAB118 here:
http://www.autoelectricalspares.co.uk/lucas-dab118...

Your part no is DAB127, anybody know which is correct?

wseed

1,514 posts

130 months

Wednesday 10th January 2018
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edit ignore me. I read the DAB127 but see you've ordered DAB118 which I think is correct. I ordered this part which is DAB118 too.

Edited by wseed on Wednesday 10th January 14:50

Sardonicus

18,961 posts

221 months

Wednesday 10th January 2018
quotequote all
Jhcolling said:
Sardonicus said:
They are out there wink this is new old stock before Lucas got rationalised into generic crap, this is embossed and its knowing what a genuine one should look like hehefrownhttps://www.ebay.co.uk/itm/IGNITION-MODULE-DAB127-...
I went ahead an ordered part DAB118 here:
http://www.autoelectricalspares.co.uk/lucas-dab118...

Your part no is DAB127, anybody know which is correct?
Good luck scratchchin thats the generic Lucas muck you need to avoid frown part numbers can change if they come with terminal kits or plugs etc its the correct module that your after


Edited by Sardonicus on Wednesday 10th January 17:18

Jhcolling

Original Poster:

72 posts

133 months

Wednesday 10th January 2018
quotequote all
Sardonicus said:
ood luck scratchchin thats the generic Lucas muck you need to avoid frown part numbers can change if they come with terminal kits or plugs etc its the correct module that your after


Edited by Sardonicus on Wednesday 10th January 17:18
So you're saying DAB118 won't work?

blitzracing

6,387 posts

220 months

Friday 12th January 2018
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There are basically 2 modules- a two and three pin. The function is the same, but the three pin has a direct earth wire, and the two pin does not. You can switch between module types, but you either need a cable adapter, or make up our own connector if changing between 2 and 3 pin. Having said all that the two part numbers listed both appear to be of the three pin type, so wiring should not be a problem assuming the original is a 3 pin unit.

taylormj4

1,563 posts

266 months

Friday 12th January 2018
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TwinKam said:
Sorry (but pleased if I've saved a life by raising awareness wink )
HT voltage is massive, IRO 35,000v but the current is low so it shouldn't kill you (unless you have a pacemaker...) but it is unpleasant and avoidable.
NG7TX used the word "place"...by that he meant lay the lead so that the end terminal is near (but not touching) a bare metal part of the engine. You might have to weight it down with a tool or prop it up with a rag to achieve this. Ensure that there is nothing easily flammable nearby too (eg petrol soaked rag)
HTH

Beaten to the post by CC!
Think the current that would be delivered is certainly high enough to kill you, particularly if it went hand to hand, i.e. one hand holding the lead and another on the engine or part of the chassis/body frame. My friend at school told me her Dad was killed in this way and that was with old ignition systems. Modern ones have much higher voltages, >50kV.

taylormj4

1,563 posts

266 months

Friday 12th January 2018
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Moving away from ignition. What about the IGN and fuel pump relays?

Penelope Stoppedit

11,209 posts

109 months

Friday 12th January 2018
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TwinKam said:
Sorry (but pleased if I've saved a life by raising awareness wink )
HT voltage is massive, IRO 35,000v but the current is low so it shouldn't kill you (unless you have a pacemaker...) but it is unpleasant and avoidable.
NG7TX used the word "place"...by that he meant lay the lead so that the end terminal is near (but not touching) a bare metal part of the engine. You might have to weight it down with a tool or prop it up with a rag to achieve this. Ensure that there is nothing easily flammable nearby too (eg petrol soaked rag)
HTH

Beaten to the post by CC!
I used to test myself with HT Leads to see if I could hold on to them or not, more often than not I was able to hold an HT Lead and suffer the shock, I only ever used my right hand and kept the left hand well away from the car. Some of us are better conductors than others

over_the_hill

3,188 posts

246 months

Friday 12th January 2018
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Penelope Stoppedit

11,209 posts

109 months

Friday 12th January 2018
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over_the_hill said:
Nice, I resisted posting that I didn't get the job due to being a bad conductor

Jhcolling

Original Poster:

72 posts

133 months

Saturday 13th January 2018
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Well you guys are great. I’ve removed the existing ignition amp which was a cheap imitation and replaced with part Lucas DAB118. She started immediately.

Thanks to all who gave me your input and advice.

bounce