Engine Juddering / Too Hot

[shahabudeen]

Experts - please help

just had car serviced; replaced air,oil and fuel filters. fitted new spark plugs and coolant temperature sensor.

recently when i was driving the car started juddering as if it was running out of fuel. the car would just not move. i opened up the bonnet and it was extremelyhot. the bit behind the MAF sensor, i think its the lambda unit was glowing red (belive its the cat) and the engine was juddering. 2 of the spark plug housing had popped out.

any ideas what it could be. engine management light was flashing, so hooked it up to VAG com

it found the following faults

- Random / multiple cylinder Misfire detected : p0300
-cylinder 2 misfires p0302
-sporadic 001-upper limit exceeded

mass air flow meter signal too low

just had MAF replaced recently as well

Help Appreciated

Cheeers

[Lex Luthor]

2 of the spark plug housing had popped out

Surely that would cause the juddering ??

As you have a vagcom, log the map actual and requested blocks while driving, to confirm that the MAF is working correctly.

[RickT]

Coil pack has failed and has caused it to throw a wobbly..

Thats my guess mate..

Check the coils and report back..

its pretty common (apart from the red glow..)

RicKT

[shahabudeen]

Hi rick,

by coils do you mean the spark plug housings. what should i look for. i did change the spark plugs, just in case the shop sold me the wrong ones for the car.

cheers

[shahabudeen]

Surely that would cause the juddering ??

As you have a vagcom, log the map actual and requested blocks while driving, to confirm that the MAF is working correctly.

ive never done this b4, can you guide us thru it mate

many thanks

[Lex Luthor]

ive never done this b4, can you guide us thru it mate

It will probably be measuring block 003.
If not can you post the part number of the ecu as read from vagcom. When you open the controller it is listed in the "VAG Number" box.

Mearsuring blocks and logging is here :

http://www.ross-tech.com/vag-com/tour/m-blocks.html

[shahabudeen]

Hi All,

Ive replaced the 4 spark plugs with iridium bosch ones. the juddering has now stopped. but for some reason the engine gets extremely hot after even a short journey. the air filter is too hot to touch. im a bit sceptical to take it on a long drive just incase the same juddering re-occurs.

can anyone help, vag cam says no faults found.

cheers (RickT)

[RickT]

when you say hot... how hot?? does the needle more above 90'c?? it should never move above unless something is wrong..

RickT

[Lex Luthor]

Can anyone help, vag cam says no faults found.

With your VAGCOM you can read the actual engine temperature, not the sanitised version as displayed on the gauge.
What is it?

[shahabudeen]

nah the temperature stays on 90. i thought thats to do with the coolant.