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HELP..Idling too rich


Axel
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My 93 Corolla has started idling too rich.

The idle is 'bouncing' between 300 and 800 rpm and blowing smoke.

Occasionally on idle the tacho seems to give a 'twitch'.

On acceleration from a stand still I get large amounts of smoke.

Driving is smooth when accelerating but jumping/jerking when holding low speeds.

I did an ECU reset and nothing changed except the blinkers stopped working.

Any ideas would be great.

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Is the smoke blue-ish? And only happens after idle or low/no throttle such as going downhill?

If so it sounds like your valve stem seals need replacing.

I can't explain the other behavour other than the oil is maybe flooding the engine a bit and causing the idle to play up.

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Thanks for that.

I found the problem, I'd knocked the vacuum hose off the vaccuum sensor.

Reconnected it and all is running fine.

Blinkers still don't work but the same thing happened with them a couple of weeks ago after disconnecting the battery and they came back after a couple of days...Wierd!

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The up and down rpm thingy in low idleing is called IDLE HUNTING.

Clean your air flow metre, also try replacing a new airfilter.

Hopefully that whud help.

Considering he said he fixed the problem by fixing the connection to the VACUUM SENSOR, aka MAP sensor, this means that

a ) the problem is fixed

b ) he doesn't have an air flow meter, or AFM (AE92s had MAP sensors)

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Considering he said he fixed the problem by fixing the connection to the VACUUM SENSOR, aka MAP sensor, this means that

a ) the problem is fixed

b ) he doesn't have an air flow meter, or AFM (AE92s had MAP sensors)

Yeah i thought so he didnt have the AFM. If he did have the afm then that will be 100% problem. I use to have 32 GTR it happan to me. AFM was cause the problem.

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