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The mkiv Supra Owners Club

Engine losing revs


wallace9

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Help please guys

 

My car has started losing revs. Its happening when I'm coming to a stop eg. traffic lights or junction. Its actually got so low that the car has stalled a couple of times. There's no warning lights coming on. Its a 95 N/A Manual.

Its been running perfectly since I got it about 5 months ago. This problem has only started in the last couple of weeks. She is due a service but only for fluid changes. Could it be the spark plugs need replacing or is it more likely to be an electrical fault?

 

Any help would be appreciated :)

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Funnily enough mine has done this twice.

 

First time was when I got it...didnt realise it needed super unleaded, and was running it on unleaded for about a tank...and it started....as soon as i put super in it....worked perfectly.

 

Has done since until last week...just before i went away on holiday the orange low oil light popped up....and next time i started the car it was running like shite.

 

I started it up today after holiday, and it wasnt quite as bad.....didnt stall, but still very irratic idling, so i filled it up with some expensive oil....and now its running nicer than it ever has :)

 

If its due an oil change, that might fix your problem - possibly worth splashing out on a good oil?

 

Mine is a TT 6 speed J-spec btw

 

Hope that this helps

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Perhaps start with the IACV maybe?

 

Spot on.

 

First thing would be to clean the IACV, located on the intake manifold, carefully remove it and soak it in lemon joice overnight....

 

Then reset the ECU and give it a drive for a little while, then check for error codes.

 

If you search for all the terms i have used here you will find what you need :)

 

EDIT - does an NA have an IACV? If not ignore that bit!

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