Advice needed ( missfire & turnover ).

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19 March 2009, 10:37 AM

mick walsh

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Advice needed ( missfire & turnover ).

Need some advice on a couple of problems !
Car is wrx sti type u.k 54reg upgrades are full exhaust, typhoon induction, dump valve, ecutek.
On turn over it is very hesitant, it fires up but just sounds lazy ( worse when it is a cold morning ) could it be the spark plugs, coil pack etc ?
Also it is missfiring ( popping ) when you let off the accelerator ( usallly after a bit of load ) just one or two pops.
Any advice would be much appreciated.
Cheers everyone.
mick.

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19 March 2009, 10:45 AM

Glowplug

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With a decat, IK and VTA DV pops and bangs are to be expected
Lazy starter esspecially on cold mornings signals poor battery condition, i take it it starts ok when its been run and is warm??

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19 March 2009, 11:05 AM

mick walsh

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Thats what i thought so i replaced battery 1 week ago ( it was on the way out anyway ) but still the lazy start up is still there.
It was always a bit better the warmer it was.
Thats good to know about the dump valve cheers.

Last edited by mick walsh; 19 March 2009 at 11:09 AM.

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19 March 2009, 11:20 AM

Glowplug

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Quote:

Originally Posted by mick walsh

Thats what i thought so i replaced battery 1 week ago ( it was on the way out anyway ) but still the lazy start up is still there.
It was always a bit better the warmer it was.

I posted this in a post earlier this morn, it may be relivent to yours too

Quote:

Originally Posted by b13bat

Have read that some MY's have a so called 'smart alternator'. This type of alternator only charges when it senses a drain on the system, the advise is to drive with at least side lights on at all times.
Turn on the side lights with engine running and test the charge to the battery, you will then prob find the alt is giving 14.?volts
If the search was working i would post previous threads but.........

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