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odd noise from engine

5K views 11 replies 6 participants last post by  Thingamajigs 
#1 ·
Hi, i just recently got myself a ZR 105+ :D

but it came with a few problems as im finding out NOW after buying it!

the problem i have atm is the noise coming from the injection system. long after my car has been switched off it emits a high pitched constant beeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeep. rather annoying while working on the car, although not tooooooo loud its distractable in volume.

other than that it makes a sort of crackle or valve opening noise after the engine is switched off for up to 20 seconds.


on a side note... does having a headlight bulb out = fail on the MOT?
if so that garage have got some explaining to do
 
#2 ·
Not sure about your beep noise, the other one sounds like to idle valve resetting - they all do it, some are noisey some are'nt. Yes, It would fail for a headlamp bulb. Trouble is, they can blow anytime so may have been OK for the test and went when you tried it.
 
#5 ·
actually this mornin it happened again the clicking, an i hadent driven the car in hours!, i just opened the bonnet to change my washer jets.

the beeping noise tho...
earlier while i disconnected the battery to change a lightbulb the noise stopped :D
then when reconnecting it i heard a nice computer beep on noise, that made me feel like something had switched on an was working :)

ahhhh car noises :D
 
#8 ·
I was under the impression that it was caused by dirt in the Idle Air Control Valve, or a IACV on its last legs.

I blasted a load of WD40 in it but eh, it did nowt. And as i lacked the tools to properly remove it, i just forgot about it.

But yes, mine too gives off a constant faint beep, and it also randomly starts "crackling" when the car engine has been off for a while. I honestly think this is a sign of a faulty/dying IACV
 
#10 ·
it is 100% normal. they all do it. if it doesn't do it then you can start to worry.

Turn on your ignition then turn it off, under the bonnet you will hear a high pitched noise for about five minutes after which the idle valve will crackle, buzz, make a noise and the high pitch noise will stop.
 
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