corolla losing power

[aidank]

my fathers 2001 1.4vvti corolla with 108k genuine miles on the clock is losing power and juddering between 2000 -2500rpm. doesnt matter the gear doesn't matter the load on the engine. Car stored inside most of its life, like new. Its worse when the car is cold and effect reduces when the car comes up to operating temp. Check engine light on too on the dash, its on for long time, it could be due to the MAF when the mechanic looked at it a long time ago they used to give problems on the early VVTis I think. Air filter is clean.

Its not the spark plugs they are only 2mths old, just looked at them they are perfect.

I have a feeling its the mass airflow sensor. Tomorrow I will take it out and clean it and measure resistance across the pins.

Whats best to use to clean it. I will end up getting a new MAF I have a feeling, is this something a motor factors could get or will I be going to a breaker

[Benmac]

A decent motorfactors will be able to get one but try the dealer too as it'll be a genuine part and the price might not be that terrible. Other thing, before faffing around with measuring resistance across pins etc just run a cheap scan using an OBD tool and see what code it spits out.

[Scrump]

Have you tried running tje car with the MAF unplugged.
In my experience this results in the car running without the incorrect sensor reading and defaulting to a standard value, causing the car to run better if the MAF was giving incorrect readings.

[paul_c123]

Look at live data for the mass air flow rate. Or just throw parts at it.....

[Megaflow]

aidank said:

my fathers 2001 1.4vvti corolla with 108k genuine miles on the clock is losing power and juddering between 2000 -2500rpm. doesnt matter the gear doesn't matter the load on the engine. Car stored inside most of its life, like new. Its worse when the car is cold and effect reduces when the car comes up to operating temp. Check engine light on too on the dash, its on for long time, it could be due to the MAF when the mechanic looked at it a long time ago they used to give problems on the early VVTis I think. Air filter is clean.

Its not the spark plugs they are only 2mths old, just looked at them they are perfect.

I have a feeling its the mass airflow sensor. Tomorrow I will take it out and clean it and measure resistance across the pins.

Whats best to use to clean it. I will end up getting a new MAF I have a feeling, is this something a motor factors could get or will I be going to a breaker

So there is a fault with the engine, there is a light on to tell you there is a fault, and when plugged into a code reader it will tell you what the fault is, or at least a damn good starting point to begin investigations.

But, you going to ignore that, take a wild guess and fire up the parts cannon... ok...

[Scrump]

OP, your family seem to be very unlucky when it comes to Toyota Corollas and juddering.
https://www.pistonheads.com/gassing/topic.asp?h=0&...

[Megaflow]

Scrump said:

OP, your family seem to be very unlucky when it comes to Toyota Corollas and juddering.
https://www.pistonheads.com/gassing/topic.asp?h=0&...

3 clutch's in 200k!



ETA: Also, roundabouts in 5th gear at 1200rpm... I think I can see where the issue is. I'll bet this engine has never been above 2000rpm and needs a damn good 'Italian Tune Up'!

Edited by Megaflow on Friday 29th August 09:50

[aidank]

Scrump said:

OP, your family seem to be very unlucky when it comes to Toyota Corollas and juddering.
https://www.pistonheads.com/gassing/topic.asp?h=0&...

spark plug was the problem there, different car this time

[aidank]

Benmac said:

A decent motorfactors will be able to get one but try the dealer too as it'll be a genuine part and the price might not be that terrible. Other thing, before faffing around with measuring resistance across pins etc just run a cheap scan using an OBD tool and see what code it spits out.

yes will do this next,

Its actually not the sensor, measured the resistance across the relevant pins this evening and its reading 2k Ohms which is correct as per the manual. Also swapped it with a known good one and no different.

[Scrump]

aidank said:

spark plug was the problem there, different car this time

Glad you got that one sorted.