help?? calling all misfire experts??
23-02-2009, 09:34 PM
#1
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help?? calling all misfire experts??
friends 450 bhp harvey engined focus has a misfire,
fine under 20psi of boost. fine up to 30psi till it gets to running temp.
on p8 ecu,, and same with a L8.
fairly new engine loom all new sensors, had few sets of different plugs in it, new leads cap arm phase etc etc, pectel monitor says all ok.
fine under 20psi of boost. fine up to 30psi till it gets to running temp.
on p8 ecu,, and same with a L8.
fairly new engine loom all new sensors, had few sets of different plugs in it, new leads cap arm phase etc etc, pectel monitor says all ok.
23-02-2009, 09:47 PM
#2
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sounded a bit spluttery up knockhill yesterday
seemed to clear now and again
just seemed to do it under load
sounded like dodgy spark somewhere but you've already changed everything?
whats the plug gaps?
i had jamie's right down to .6mm to stop the splutter on high boost
seemed to clear now and again
just seemed to do it under load
sounded like dodgy spark somewhere but you've already changed everything?
whats the plug gaps?
i had jamie's right down to .6mm to stop the splutter on high boost
23-02-2009, 09:48 PM
#3
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sounded a bit spluttery up knockhill yesterday
seemed to clear now and again
just seemed to do it under load
sounded like dodgy spark somewhere but you've already changed everything?
whats the plug gaps?
i had jamie's right down to .6mm to stop the splutter on high boost
seemed to clear now and again
just seemed to do it under load
sounded like dodgy spark somewhere but you've already changed everything?
whats the plug gaps?
i had jamie's right down to .6mm to stop the splutter on high boost
we've had them down to 23 thou which is about the same
Last edited by andrewg; 23-02-2009 at 09:50 PM.
as said andy give him a bell 
23-02-2009, 10:03 PM
#12
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same fuel set up as i had when it was 620 bhp using only one high pressure pump supplied from swirl pot fed by two red tops, and it doesn't need a corner
23-02-2009, 10:04 PM
#13
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23-02-2009, 10:05 PM
#14
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23-02-2009, 10:07 PM
#17
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23-02-2009, 10:09 PM
#19
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23-02-2009, 10:14 PM
#23
Had something like this once, has it had a new ignition amp? if so there needs to be lots of heat cream between it and the alloy mounting plate. Otherwise the amp over heats and causes a misfire or even shut down!! Its ok when cold, but it would get worse as the motor warmed up! In my case it had me goin for a while!!
Cheers....
Cheers....
23-02-2009, 10:15 PM
#24
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i had similar trouble with mine ages ago
in the end i found that a pin in the connector to the coolant temp sensor had slipped down, it was still in the plug but had come off of the sensor itself so wasnt reading any heat
its got to be worth a check.
what about plug leads?
in the end i found that a pin in the connector to the coolant temp sensor had slipped down, it was still in the plug but had come off of the sensor itself so wasnt reading any heat
its got to be worth a check.
what about plug leads?
23-02-2009, 10:16 PM
#25
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23-02-2009, 10:18 PM
#26
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i had similar trouble with mine ages ago
in the end i found that a pin in the connector to the coolant temp sensor had slipped down, it was still in the plug but had come off of the sensor itself so wasnt reading any heat
its got to be worth a check.
what about plug leads?
in the end i found that a pin in the connector to the coolant temp sensor had slipped down, it was still in the plug but had come off of the sensor itself so wasnt reading any heat
its got to be worth a check.
what about plug leads?
its mint we had break out lead in there checking it all
23-02-2009, 10:19 PM
#27
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Had something like this once, has it had a new ignition amp? if so there needs to be lots of heat cream between it and the alloy mounting plate. Otherwise the amp over heats and causes a misfire or even shut down!! Its ok when cold, but it would get worse as the motor warmed up! In my case it had me goin for a while!!
Cheers....
Cheers....
23-02-2009, 10:28 PM
#30
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23-02-2009, 10:29 PM
#31
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24-02-2009, 08:24 AM
#34
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Rob
Last edited by Rob; 24-02-2009 at 08:25 AM.
26-02-2009, 05:56 AM
#38
Testing the future
