ignition module - Electronic Circuits Projects Diagrams Free

induction1 · 7th June 2003, 07:05 AM

the ignition module in my car (according to some people) malfunctions due to very high engine heat (and module age). i don't know what's in the module (surely just some ic's), but when it does overheat the car stalls. the car starts when it cools off. if this is the case will an ic resume funcitionality upon cooling, or will it just die. i don't want to buy a new one if it's just going to die again due to heat. obviously i'm not sure if the im is the ultimate problem or not. any ideas? i was thinking about putting a 1/64" piece of aluminum with cooling fins between the module and mount. how about a 1.25"x1.25" peltier junction?

Phasor · 7th June 2003, 12:13 PM

You may be able to prolong the module's life a little longer by having a cooling method, but ultimately, it will probably die completely, due to degradation. I would start looking for another module (you may be able to find a second-hand one fairly cheaply at a wrecking yard, or a swap-meet).

lavenatti · 7th June 2003, 04:36 PM

This is not at all uncommon in Fords. If thats what you have, just get it away from the engine heat or heatsink it. A peltier would work great, just remember they draw a good amount of current and the hot side gets hot.
I've seen people pouring water or putting ice on Ford ignition modules more than once. I had a similiar problem but actually traced it back to a faulty voltage regulator. The excess voltage caused the ign. module to overheat.

induction1 · 8th June 2003, 03:01 AM

yep, it's a mercury. thanks guys. any other advice for these things?

**mechie** · 9th June 2003, 10:34 AM

Millions of years ago I saw a problem with a HT lead (carbon composition I think) causing a similar fault - hot = lose a cylinder, cool down = OK again :!:
Given that leads are cheaper than EMUs you could try swapping them first :?:

windozeuser · 24th November 2003, 11:34 PM

ya that may be caused by the engine heat or a real cheap-o box... that leaves a carbon trace inside the Module and shorts it out. when it is hot it has a very high resistance making the module malfuncution and when it cools it has a lower resistance u should buy i new one and maybe mounting the ignition box on the firewall away from engine heat

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7th June 2003, 07:05 AM	(permalink)
induction1	ignition module the ignition module in my car (according to some people) malfunctions due to very high engine heat (and module age). i don't know what's in the module (surely just some ic's), but when it does overheat the car stalls. the car starts when it cools off. if this is the case will an ic resume funcitionality upon cooling, or will it just die. i don't want to buy a new one if it's just going to die again due to heat. obviously i'm not sure if the im is the ultimate problem or not. any ideas? i was thinking about putting a 1/64" piece of aluminum with cooling fins between the module and mount. how about a 1.25"x1.25" peltier junction?

7th June 2003, 12:13 PM	(permalink)
Phasor	You may be able to prolong the module's life a little longer by having a cooling method, but ultimately, it will probably die completely, due to degradation. I would start looking for another module (you may be able to find a second-hand one fairly cheaply at a wrecking yard, or a swap-meet).

7th June 2003, 04:36 PM	(permalink)
lavenatti	This is not at all uncommon in Fords. If thats what you have, just get it away from the engine heat or heatsink it. A peltier would work great, just remember they draw a good amount of current and the hot side gets hot. I've seen people pouring water or putting ice on Ford ignition modules more than once. I had a similiar problem but actually traced it back to a faulty voltage regulator. The excess voltage caused the ign. module to overheat.

8th June 2003, 03:01 AM	(permalink)
induction1	yep, it's a mercury. thanks guys. any other advice for these things?

9th June 2003, 10:34 AM	(permalink)
mechie	Car Ignition Problems Millions of years ago I saw a problem with a HT lead (carbon composition I think) causing a similar fault - hot = lose a cylinder, cool down = OK again :!: Given that leads are cheaper than EMUs you could try swapping them first :?: __________________ I need a memory upgrade ... My head is full !

24th November 2003, 11:34 PM	(permalink)
windozeuser	ya that may be caused by the engine heat or a real cheap-o box... that leaves a carbon trace inside the Module and shorts it out. when it is hot it has a very high resistance making the module malfuncution and when it cools it has a lower resistance u should buy i new one and maybe mounting the ignition box on the firewall away from engine heat