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Author Topic: Pinking  (Read 2424 times)

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jonnycool

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Pinking
« on: 09 August 2009, 21:16:29 »
My car is pinking badly under anything more than medium load, I know modern engines are not supposed to but mine definitely is. Also very sluggish and misfiring badly intermittently. Beginning to think I'll  have to get rid of this car if much else goes wrong :( :(

Any suggestions as to what could be wrong?
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Ghost

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Re: Pinking
« Reply #1 on: 09 August 2009, 21:34:19 »
Do the paperclip test and see what codes you get.
then post them here and we can help you further mate.
sound like you might need a cs sensor. ( code 19 )
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jonnycool

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Re: Pinking
« Reply #2 on: 09 August 2009, 21:41:03 »
Quote
Do the paperclip test and see what codes you get.
then post them here and we can help you further mate.
sound like you might need a cs sensor. ( code 19 )

Got a whole load of codes for misfires but not crank sensor code, I changed that recently, did it all right - genuine GM, routed away from exhaust on inner wing. Recently also had a coil pack changed for misfires on one bank of cylinders
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Lizzie_Zoom

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Re: Pinking
« Reply #3 on: 09 August 2009, 21:43:35 »
Quote
Quote
Do the paperclip test and see what codes you get.
then post them here and we can help you further mate.
sound like you might need a cs sensor. ( code 19 )

Got a whole load of codes for misfires but not crank sensor code, I changed that recently, did it all right - genuine GM, routed away from exhaust on inner wing. Recently also had a coil pack changed for misfires on one bank of cylinders


Did, and have you checked the spark plug wells for oil?? :-/ :-/

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Lee A

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Re: Pinking
« Reply #4 on: 09 August 2009, 21:45:24 »
Tank of dodgy fuel perhaps? Has it been doing it a while?
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jonnycool

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Re: Pinking
« Reply #5 on: 09 August 2009, 21:49:54 »
I do use cheap supermarket fuel, yes. Always have done though :-[

Spark plugs were dry when coil pack was done.

Could my timing belt be out a couple of notches?
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RobG

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Re: Pinking
« Reply #6 on: 09 August 2009, 23:28:09 »
Quote
Quote
Do the paperclip test and see what codes you get.
then post them here and we can help you further mate.
sound like you might need a cs sensor. ( code 19 )

Got a whole load of codes for misfires but not crank sensor code, I changed that recently, did it all right - genuine GM, routed away from exhaust on inner wing. Recently also had a coil pack changed for misfires on one bank of cylinders
Did you get an 0325 or 0330 :question
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Pete Elite

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Re: Pinking
« Reply #7 on: 10 August 2009, 00:40:36 »
If nothing obvious comes up then I'd be inclined to agree with Lee A and suggest bad fuel :-/.

  The knock sensors are supposed to eliminate pinking but if fuel contaminated who knows ::).

  Try putting in some good stuff and see if the engine runs better :y.
« Last Edit: 10 August 2009, 00:42:19 by scooby »
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Jimbob

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Re: Pinking
« Reply #8 on: 10 August 2009, 06:13:51 »
ive seen a few vauxhalls retard themselves due to bad fuel when checking live data.

my recommendation has been a couple of tanks of vpower etc, then stick to shell etc, sorted them all out  :y - 1 of them had been in a garage a fortnight with no joy, 2 mins on live data, fixed!

good petrol, italian tune up, job done  :y
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jonathanh

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Re: Pinking
« Reply #9 on: 10 August 2009, 06:30:33 »
far be it from me to suspect the worst but I'd check the cambelt timing.  My thinking is that if it has jumped a few teeth then the ECU may be getting the ignition timing wrong.  i'd certainly do this before the italian tune up..
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Jimbob

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Re: Pinking
« Reply #10 on: 10 August 2009, 07:46:00 »
Quote
far be it from me to suspect the worst but I'd check the cambelt timing.  My thinking is that if it has jumped a few teeth then the ECU may be getting the ignition timing wrong.  i'd certainly do this before the italian tune up..


yes, reading my post back its not good advice, the meaning was if live data showed the knock sensors were asking the engine to retard,,,, then follow my suggestion  :y
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Kevin Wood

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Re: Pinking
« Reply #11 on: 10 August 2009, 10:10:08 »
Ignition timing is based on the crank sensor output so the cam timing won't affect it. Still worth a check of the cam timing perhaps.

Other possibility is a very lean mixture. Check for air leaks into the induction system, fuel delivery (filter ok?) and perhaps have a look at the live data to see what the fuel trims are doing. Are you getting fuel trim codes? (0170 & 0173)?

Kevin
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jonnycool

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Re: Pinking
« Reply #12 on: 10 August 2009, 13:19:17 »
thanks for all the replies, yes - i am getting codes 0170 and 0173, i've got a cheap new MAF coming to see if that helps. And i'm getting 0300 as well on the codes, if that helps the diagnosis
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Brick Tamland

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Re: Pinking
« Reply #13 on: 10 August 2009, 13:26:31 »
Is it making any noises?

Vauxhalls definetly dont like dirty petrol. My dads old omega a (carlton) got bad petrol once and it wouldn't work at all until the tank was drained. Then only a couple of weeks ago his 2.5 was hard to start and then started missing with a strong smell of petrol but this went away after it warmed up and a good motorway run.
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jonnycool

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Re: Pinking
« Reply #14 on: 10 August 2009, 19:24:47 »
Quote
Is it making any noises?

Vauxhalls definetly dont like dirty petrol. My dads old omega a (carlton) got bad petrol once and it wouldn't work at all until the tank was drained. Then only a couple of weeks ago his 2.5 was hard to start and then started missing with a strong smell of petrol but this went away after it warmed up and a good motorway run.

It is making a noise rather like a worn cam (clicking) when the misfire starts happening, then disappears when it starts running ok again
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