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The mkiv Supra Owners Club

MR2 3S-GE Intermittent Starting / Rough Idling Problem


mawby

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Does your car have a MAF? Few months ago the plug fell out of ours and the car ran like a bag of sh1t. Engine light on, runs really rough and if you don't use a LOT of gas it stalls.

 

Of course if you don't have one it won't be that lol.

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Unfortunately, when the car was running, I noticed a small puddle appearing under the radiator. A few drops of coolant were leaking from the radiator air drain, so I tried to close the valve tighter and it did turn about 15 degrees but then there was this hissing noise for a few minutes. :( So it looks like the valve is buggered. I'm hoping some radweld will fix it as I really don't want to have to replace the radiator because of this valve.

 

or you could just replace the o-ring on the valve tap, common fault :D

 

Lyndon.

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You know this site has been far more helpful with my MR2 problem than the MR2 sites have ever been!

 

So I'm going to ask this question here and see if anyone knows the answer;

 

 

Does anyone know what the difference is between part numbers;

 

89661-17360

89661-17290

 

Both have the description "3S-G A241E" but my car has the 17360 which needs replacing, but the only second hand ones I can find are all 17290. I don't want to put a 17290 one in only to find something suddenly stops working.

 

I'm 99.9% sure I can just put a 89661-17290 ECU in and it will work (and I may have to given I can't find any 89661-17360 ECUs) but I'm guessing there must be a difference otherwise there wouldn't be two different parts.

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  • 3 weeks later...

I've been meaning to update this thread.

 

The ECU's are not interchangeable, but I managed to find the correct one in the end for £45. Fitted it and the car started up first time. :)

 

I got Paul Whiffen to send me a new cock and ring :blink: to try and fix the radiator leak. The new cock was too long for the hole so I couldn't use it, but I changed the ring on he old one which was knackered and that stopped the drain valve from leaking.... but then it sprung a leak from where the valve joined the radiator. One bottle of RadWeld later and that leak seems to have stopped now, so it's not going to be long now before the little MR2 is back on the road. :D

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My dad had this problem on his 3sge about a month ago. Same symptons.

 

Turned out to be a altenator was on its way out. Very common on the 3sge as it is below the oil cap/filler and over time it gets cloged up easly.

 

Becks

ironic, my MR2 has a similiar issue, though it does seem a bit of a silly place to have the alternator:P if i could easily access it, id give it a proper clea, maybe replace the bushes. it doesnt look tooo complicated to remove, diagnosis mount, and another thing will free up room to remove from the engine bay.

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