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Fair point Gullzter... I have already had the bracket off and given it a clean up and polish, perhaps I'll try running a bit of wire straight from the battery negative to the bracket as a test - at least that will categorically prove the earth is ok. And the coil is new, so that should be fine, all ...

Seems logical, ok, I'll go with this, thank you! Seems like all of the ebay ones are used. They seem to be the same part number across all models (and as sheppy confirmed by running an NA on a turbo) would I be better off getting one of the plastic bodied looking ones that seem to come from the turb...

My first guess was the coil, and that has been replaced with a new one (which didn't fix the problem), so I know that is ok now. I'll see if I can find this MR2 instruction manual, that sounds helpful ta! The bracket is used as an earth is it? That could be a problem area I guess, may be a dodgy ear...

Tested for spark cranking by having a spark out and cranking it over - nothing there, is that what you mean? This is what drove me to the coil, but could still be the ignitor. Obviously if anyone more knowledgeable and local can help me diagnose or lend me an ignitor perhaps, there could be a purple...

Hi everyone. I have the age old "my car won't start" problem, but after reading 101 different threads I'm totally confused on the best way forward. So, back story. UK spec R reg MR2. Second car, so she doesn't get driven much in the winter (but is stored outside). Weather looked good the o...

Hi there,

I replaced the alternator, and all was well. Changing the alternator was a bit of a pain though! For reference, it seems that the faulty voltage regulator in my alternator was discharging the (perfectly good condition) battery overnight when the car was off and locked.

I was just trying to ascertain if anyone else had seen similar symptoms of a faulty alternator discharging the battery when the engine wasn't running - perhaps saving me replacing unnecessary components. Alternator is on order anyway, I'll get this fitted Wednesday and go from there.

Well, the battery is good and healthy, that is the only known quantity at the moment. It is a new battery purchased and fitted less than a week ago, when the original battery flattening started. A new battery was the obvious and easiest remedy, but it seems not the correct one! The alternator, or mo...

So, I will sort the alternator as soon as possible, as that seems to be the problem - but I have an additional discovery too, the battery will go flat after a day or two of it not being used... I assumed this was just a crap battery, but I fitted a new high power one on Wednesday evening, and used t...

Ah clever, yes I can see that has potential, thank you! Now all I need is a new alternator that works then!

UK car, R reg, T bar with power steering but no air conditioning.

Hopefully you're going to say this is the easiest of all of them, and after undo-ing two bolts it just falls out of the car?

Oh great! Maybe fixing the regulator might be the best plan then!! It doesn't sound (nor look) like the alternator just "pops out" either, perhaps requiring the removal of my exhaust (with exceedingly corroded cat connections) as well? I can see this not going well.

Thanks toxo, The alternator actually looks in fairly good nick, I'm thinking some water must have got in there and fried the regulator - its been pretty wet down my way these past couple of days. Seen a post or two about making the alternator a little lid to keep the rain out from the engine cover v...

Excellent, thank you! Just to add, here is the story from today - hopefully we still reach the same conclusion... Started the car this morning (after removing, inspecting and replacing the ECU-IG fuse last night) and all seemed fine. Voltage at the battery was around 13v and dashboard warning lights...

Peter Gidden - SBITS wrote:Just to summarise - using a proper voltmeter (not the dash instrument), you're seeing 18V with the engine idling?

Yep, that's right, and if I switch on the headlights I get that down to around 16 or so. With wipers and fan, etc going too, I saw a (what I would consider) more reasonable 14v odd.

Excellent - that's an encouraging start! Does it sound like the regulator is the bit at fault then? Don't suppose you'd know how easy they are to replace or where to get them from do you? Found a couple of posts talking about pulling the ECU-IG fuse too and it all being connected to the engine bay c...

It might not be alternator, there are checks to do. Make sure your battery is OK, it might be suffering a bit now that you've run it flat. It might be that your charging circuit is not working. The dashboard christmas tree effect happens when the nominal voltage in the car drops too low (lower than...