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Inline 6 missing badly 

 

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 Post subject: Inline 6 missing badly
Posted: Tue Jun 24, 2008 10:57 pm 
Oompa Loompa
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G'day everyone,
My EF 6 with an AU motor developed a bad miss yesterday while driving around the block. It felt exactily the same as when a lead fell off a plug. It idles ok but misses badly when revving. Me and my mate (hes an apprentice mechanic) have changed the plugs, leads, coilpack to no avail. The motor is getting spark (have cranked it and seen the spark from all plugs) but its still running like crap. Have also taken the rocker cover off and looked for valvetrain damage (which was a long shot as i dont thrash my car) and still nothing. also have cranlked the car with no plugs and there is no water in the cylinders.

Does anyone have any further ideas on what could be causing this? I am angry because i have had the engine in for less than 2 months and done 1000 kms since fitted. The motor has only done 105 000kms.

cheers in advance
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Posted: Tue Jun 24, 2008 11:07 pm 
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what model AU motor is it? if its a later one (AU 2 or 3) just hope its not the auxillary shaft driving the dizzy. if thats gone, you might as well go and get another motor.

 

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Posted: Tue Jun 24, 2008 11:16 pm 
Oompa Loompa
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Its an Au series one motor. I didnt think AU motors ran dizzys?
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Posted: Tue Jun 24, 2008 11:25 pm 
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only AU series one motors ran dizzys (i think :shock:). try replacing MAP sensor and cleaning ISC and throttle body.

 

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Posted: Tue Jun 24, 2008 11:38 pm 
Oompa Loompa
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nah it was coil pack from the beginning mate, no dizzy. We have tried just about everything we can think of. :(
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Posted: Tue Jun 24, 2008 11:42 pm 
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WiggyMK2 wrote:
nah it was coil pack from the beginning mate, no dizzy. We have tried just about everything we can think of. :(


hahaha sorry my bad, i just read what i wrote in the last post, i meant to say only AU1 motors had coilpacks lol

 

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Posted: Tue Jun 24, 2008 11:44 pm 
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bad fuel? injectors could be blocked. vacume leak maybe.

 

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Posted: Wed Jun 25, 2008 2:12 am 
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alfy wrote:
WiggyMK2 wrote:
nah it was coil pack from the beginning mate, no dizzy. We have tried just about everything we can think of. :(


hahaha sorry my bad, i just read what i wrote in the last post, i meant to say only AU1 motors had coilpacks lol


err au2 and 3 had them as well along with ef's!

 

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Posted: Wed Jun 25, 2008 8:21 am 
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Change the fuel filter and as said above look for vacum leaks.
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Posted: Wed Jun 25, 2008 3:36 pm 
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could it be the ecu?
im just guessing but maybe the au runs a different coil pack then the ef and the ef ecu cant manage teh new one or something

 

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Posted: Wed Jun 25, 2008 4:21 pm 
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if its running crap only when your driving... could it not just be your timing thats out...?

edit: actually if it feels as if it misses, then.. no this wouldn't be the case..
~

 

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Posted: Wed Jun 25, 2008 4:52 pm 
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can't adjust timing on coil packs, well not easily, and not from stock,

 

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Posted: Wed Jun 25, 2008 5:02 pm 
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Disco Frank wrote:
alfy wrote:
WiggyMK2 wrote:
nah it was coil pack from the beginning mate, no dizzy. We have tried just about everything we can think of. :(


hahaha sorry my bad, i just read what i wrote in the last post, i meant to say only AU1 motors had coilpacks lol


err au2 and 3 had them as well along with ef's!


eeh i didnt know that lol. i try to stay away from AU's :P not that i dont like working on them, its just as soon as i look at one, my retinas explode!

 

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Posted: Wed Jun 25, 2008 6:08 pm 
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turned out it was an injector, was talking to the guy that fixed it :p

 

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Posted: Wed Jun 25, 2008 7:51 pm 
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ok good, might have check mine aswell as mine has a bit of a flat spot at 2000rpm and seems a bit slower up the rev range than usual

 

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