09/58 1.4 80ps, 140k, petrol Polo knock sensor?

Question

Hi,Mate, driving home last night, 60 mph, all of a sudden he loses enginepower, no response from the throttle.Manages to coast to a safe place to pull over and the engine is stillticking over ok and still not responding to the throttle.He turned it off and tried to re-start and whilst it turned over,wouldn't fire up. Got it towed to his mates garage (not sure if he'knows' VW's) who has put some sort of OBD reader on it and it'sshowing a faulty knock sensor?What are the chances that is the fault and if so, any idea how easy itmight be to change please? eg, Is there failure mode for a knocksensor that is likely to affect the engine like this? If he coulddisconnect it, would / should that allow the engine to run?It looks like it's up the back of the block and access might bedifficult? ;-(He's going to try to put a better code reader on it himself in themorning to see if it's showing anything else of if they re-appear whencleared etc, but in the meantime, I said I'd run it past the good folkhere for him to see if anyone has experience of such?Cheers, T i m

T i m · Accepted Answer

Update:Error codes cleared and none come back when he tries to start it (andit still won't start).The only thing I can offer him remotely is to go back to basics ... isthere a spark, if there is, does it try to start with some Easy start,if it does then at least we know it's a fuelling issue?Cheers, T i m

Fredxx · Answer

What were the codes?

T i m · Answer

I've just asked him on Whatsapp and he doesn't know as they were cleared before he got back to it this morning. He just got the translation (eg, 'Knock sensor').

He wondered if he could do more with his clone VW tool than the garage could with their generic one but in this case, no.

The problem is he's not near his car and doesn't have a car ... ;-(

Assuming it's not immobilised (that's why our Meriva wasn't starting (intermittently)) he should get fuel to the injectors (even if the injectors aren't firing) and sparks at the plugs so some Easy Start in the inlet manifold whilst spinning it over should show something shouldn't it?

If it tried to fire up that proves plugs, crank / cam position sensor, compression so cam-belt, ECU (for those bits anyway) and if the throttle responds at all, the throttle body / position sensor etc?

The outcome of that linked with the scenario of his going from 60 to tickover pretty quickly and with no other issues / indication (no hesitation / misfires / noise changes etc)? That it continued to tickover till he turned it off but wouldn't start to tickover again? (that also suggests the cam belt is ok etc)?

Cheers, T i m

09/58 1.4 80ps, 140k, petrol Polo knock sensor?

Join the Discussion

Didn't find your answer?