Technical MPi Knock Sensor location

[ralphtown]

Anyone who has followed my threads about my MPi seicento,know that I,m now very happy with the car and its performance.

BUT.....

I,ve had the codes cleared on the car and had to pop back to my chum with the reader,coz the engine light came on again.
Only fault that keeps coming up is knock sensor.
I,ve replaced the injectors and that cured that fault and the car is now pulling well in all the gears and is a pleasure to drive.
But the engine light keeps coming on after a day,after clearance and says knock sensor.
So,where is it and are they easy and cheap to replace??

RALPH.

 

[fingers99]

It's on the block at the back under the inlet manifold. Just screws in and out (don't screw it in too tight). I'd look at the connector and wires first, though.

 

[ralphtown]

Curse my luck.
It would be somewhere where you need the fingers of an alien or the car in the air!!

Are they cheap??
Got any scources for a quality part??

RALPH.

 

[fingers99]

Big Mick (aka Fluffy the Impaler) is usually cheapest. Best to ring eurocarcare in Derby (Google will find).

 

[ralphtown]

Nice one.
Thanks.

RALPH.

 

[cc1]

You don't want to know the price new....
Get a second hand one as they are pretty reliable.

 

[ralphtown]

I,m not thinking about price right now.

The exact location is the real problem and how to get to it without having to pay anyone.

I had a quick look this morning and could,nt see anything on the timing belt end,so I,m assuming its closer to the gearbox end,so,should I go in thru the wheel well or get it up and attack it from underneath.

It would,nt surprise me if its actually unplugged!!

After giving it to the "experts" before Christmas,the engine light has been on and off since they messed it up.
That would be the ideal scenario anyways.

RALPH.

 

[cc1]

Knock sensor is near the top of the block and in the middle.

 

[fingers99]

It would,nt surprise me if its actually unplugged!!

Nor me!

Easiest way would probably be to take off the inlet manifold. It's just where cc1 says.

 

[cc1]

Nor me!

Easiest way would probably be to take off the inlet manifold. It's just where cc1 says.

You would have to drain some coolant off because of the sensor within it. You can get to it from under the car ok.

 

[ycming]

Could i remove the knock sensor completely?

 

[ralphtown]

I,ve got a new one coming and I,m going to put the car on axle stands today and wait for it to turn up.
Of course,I,ve wasted my money if I find out it was simply not plugged in after "the experts" took the engine out to change a clutch....I **** you not!!


RALPH.

 

[fingers99]

Could i remove the knock sensor completely?

Only if running an aftermarket ECU (and then, probably only some), although I'm unsure of what, exactly, the ECU will do if you pull it -- retard the ignition, maybe?

But a knock sensor is a good thing. Detonation destroys engines, and the stock pistons are not uber strong.

 

[fingers99]

I,ve got a new one coming and I,m going to put the car on axle stands today and wait for it to turn up.
Of course,I,ve wasted my money if I find out it was simply not plugged in after "the experts" took the engine out to change a clutch....I **** you not!!


RALPH.

You can always sell it on. Still...............

 

[ycming]

Running the 1.4 engine with the mk1 punto ecu, which doesn't take the knock sensor. Just don't want a sensor sitting there doing nothing.

Like if i remove it, do i need to block it up ?

 

[fingers99]

Nah. It just screws into a blind boss, so no problems. Just pop it in a bag, keep it for a rainy day.

IIRC, Kristian cracked a set of 16v pistons by running too much advance when he was first experimenting with Megasquirt.

 

[ralphtown]

I,ll sell it on once its 100%.
I never sell a dodgy car.
I,m a glutton for punishment tho coz I want a Punto HGT or Sporting.
A HGT that has the funky blue or yellow,side skirts and alloys would be nice.

I,ll get it sorted coz I,m a bloody minded SOB

RALPH.