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View Full Version : Help Required VVTI 1.0 W reg


diablo7772
02-01-2012, 05:00 PM
Hello Yaris owners,

My dad owns a yaris 1.0 VVTI on a W reg. 131K on clock

The car has a hole in the exhaust just after the last Lamba sensor, well kind of 4 holes.

I have changed the sump on it last night and left the silicon to dry for over night+ new oil filter, plugs, new air filter + cleaned the maf.

To change the sump, the exhaust had to be taken off and the flywheel cover plate had to be taken off + the out put lamba sensor disconnected.

When i started the car the Hot engine light went on and then straight to cold after about 3 secs.

This evening starting the car it felt slugish and the revs are all messed up.

When i put the foot down on the floor it kind of gradually goes up till the top.

When i took it for a drive it took me ages to accelerate from about 4 mph to 12 in first. Second gear was same as first. As when i put it in third the revs dropped and when i put the foot down it didn't even want to go but only kept at idling and i was loosing speed.

If any one have had this problem or anything similar can you please let me know what i have to change.

The car is on 131k and it never had a new clutch fitted.

Thank you very much

Yury
02-01-2012, 05:11 PM
Did you plug the maf back in? I know it's kinda obvious...

diablo7772
02-01-2012, 05:15 PM
Yeah the maf is plugged in and i just took all the plugs off checked them, took the maf out to have a look, took the neg off the bat and held the brake pedal for 10secs to reset ecu.

I will record a video tomorrow :(

Yury
02-01-2012, 05:22 PM
Yeah the maf is plugged in and i just took all the plugs off checked them, took the maf out to have a look, took the neg off the bat and held the brake pedal for 10secs to reset ecu.

I will record a video tomorrow :(

how did you clean the maf?
I guess you can unplug it and see if the car acts any different.
Do you have anything to read OBD2 data?

diablo7772
02-01-2012, 05:30 PM
I used some WD40 and then just soft cloth. I will do that in a sec!

Yeah i have a OBD2 reader.

Yury
02-01-2012, 05:35 PM
I used some WD40 and then just soft cloth. I will do that in a sec!

Yeah i have a OBD2 reader.

Did you spray WD-40 on the maf wires?

diablo7772
02-01-2012, 05:36 PM
Just took of the maf and had a go in the car it has helped the problem a lot but it has put it in limp mode so limited to 3.3k revs.

I will take it off and just dry it :) see if that helps unless the WD has damaged it.

diablo7772
02-01-2012, 05:37 PM
The oil was only sprayed on the sensor pin.

Yury
02-01-2012, 05:39 PM
Just took of the maf and had a go in the car it has helped the problem a lot but it has put it in limp mode so limited to 3.3k revs.

I will take it off and just dry it :) see if that helps unless the WD has damaged it.

WD40 is a lubricant...it will stay in the wires forever unless you clean it off. Spray it with some electronic cleaner (or a specialized MAF cleaning spray). Some people use a non-residue carb cleaner, but many say it's too aggressive.
I suppose alcohol would work too.

Yury
02-01-2012, 05:41 PM
The oil was only sprayed on the sensor pin.

what is a sensor pin...the blobby looking thing on the side of the sensor? I presume your sensor look the same as on my 1.5...

diablo7772
02-01-2012, 05:57 PM
yeah, i will have to get some electric cleaner.

Cheers

Yury
02-01-2012, 06:23 PM
good luck.