200 - Chirp/whistle and occasional high idle

[wr6warren]

Just looking for ideas here - thankfully the dealer who did the work have offered to take it back and investigate.

So I’ve just had the timing belt/aux belt + bits done on the car, when I got it back I noticed it was making a slight chirp/squeak when you lift off after mid throttle.

Now, if you have a small mount of throttle on, you can hold it as a continual whistle, if you use less, it stops, if you use more, it stops.

Today there were several occasions where it seemed to hold idle at around 1500rpm.

Seems to generally drive ok.

Dealer seems to know their stuff, and is fairly sure the sound is air rather than belt slip.

Intake fittings checked, throttle body seal checked, aux belt and tensioner checked, pcv blanked off and noise persisted.

Anything else worth checking that would fit these symptoms? Or that would have been disturbed with the new belts?

Thanks in advance!

 

[wr6warren]

Update today - Won't start at all. Just endlessly turns over. Buzzing with my new purchase

 

[LiamP]

Can you plug it into an OBD reader? Anything cheap will likely help you narrow things down, sounds like a vacuum leak but then not starting could be crank sensor or maybe the throttle body (which might be the cause of the chirping noise as well)

 

[wr6warren]

I can try and get a hold of one, I plugged my own cheapy one in and it gave me P0325 - Knock sensor. Not sure how old the code was, this car did have 2+ year old fuel it when I first got it. Its cleared now but sadly it doesnt turn on for me to see if it returns

I have a new crankshaft position sensor incoming tomorrow. Would be handy if that sorts it.

Theres absolutely no hint of even trying to start, just turns over forever. The pump primes when I turn the key, immobilser light goes out as I'd expect. Should I be able to smell fuel out the exhuast if its just not sparking? Or does the crank sensor being bad stop it injecting too?

 

[LiamP]

I can try and get a hold of one, I plugged my own cheapy one in and it gave me P0325 - Knock sensor. Not sure how old the code was, this car did have 2+ year old fuel it when I first got it. Its cleared now but sadly it doesnt turn on for me to see if it returns

I have a new crankshaft position sensor incoming tomorrow. Would be handy if that sorts it.

Theres absolutely no hint of even trying to start, just turns over forever. The pump primes when I turn the key, immobilser light goes out as I'd expect. Should I be able to smell fuel out the exhuast if its just not sparking? Or does the crank sensor being bad stop it injecting too?

Hmm, wouldn't worry too much about the knock sensor as that won't stop a start or cause a noise, no other error codes is concerning, faulty crank sensor would stop injection.

 

[wr6warren]

So just an update, engine not starting - crank sensor, replaced with one from ECP and is working a treat. PCV also replaced (read it can create all sorts of weird noises if its dying) but no change.

Then looked down around the bottom of the intake, right hand side, could see the bolt intake>block wasnt nipped up tight. Got a socket in and it was tight as. Pulled the bolt out, threads seem clean as could hope for, can spin in with my fingers right to the end then hard stop. Spaced it out with washers as a proof of concept.....and the squeak was gone.

So my question is would you normally take the inlet off completely when a timing belt is being done? As im 99% sure this noise wasnt there before hand.

I suspect this isnt the right bolt and its too long. Which worries me more as it probably means theres somewhere else that has a bolt thats too short.

 

[RSRowe]

Intake doesn’t get touched at all when doing the belt

 

[wr6warren]

Yeah spoke to the guy this afternoon that did the belt. Which he then said to me he mentioned it was missing a load of bolts - didn’t click in my head that it was from the intake. Seems I had 1 of 5(?) bolts clamping to the block.

Next question - does anyone know what size and length the inlet > block bolts are meant to be.

This car may have been owned by a bit of a yee-haw in the past it seems.