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Misfire - now fixed, but comments appreciated 

 

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 Post subject: Misfire - now fixed, but comments appreciated
Posted: Fri Jul 26, 2013 12:06 pm 
Parts Gopher
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Age: 53

Posts: 74

Joined: 17th Sep 2012

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Ride: XH Ute

Location: Townsville
QLD, Australia

So I was buggering about with the electrics and shorted something out.

The car ('97 XH ute 4l auto) started to misfire soon after, so I surmised I'd blown a fuse or link, but I couldn't find it.

When I had the time I pulled each of the injector connections off and tracked it down to the 3rd cylinder. The lead was sparking so I took the plug out and there was a piece of crap between the electrode and the earth post. Flicked it out and all's well again.

The cars done around 190k and the plugs are new.

So the questions are
1 what's the likely source of aforementioned piece of crap?
2 why did No.5 injector start pissing fuel when I pushed the connector back on? Bit of a twist and it stopped.
3 Why wouldn't the 100A fusable link come out? I couldn't even lever it off.
4 When will I learn to disconnect the battery when doing electrics?

Comments, insights and flaming gratefully received.
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 Post subject: Re: Misfire - now fixed, but comments appreciated
Posted: Fri Jul 26, 2013 12:58 pm 
Getting Side Ways
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Ride: ef falcon futura

Power: 154 rwkw

Location: Koo Wee Rup
VIC, Australia

#1 was it black? could have been carbon build up from top of piston
#2 might have moved and unseated the o ring when pushing it back on
#3 dunno
#4 never

 

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ef futura, pacemakers, 2.5inch catback, k&n panel filter and 3.45 lsd. extractors/cat, ticky head, custom cam grind, t5. now onto cosmetics.

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 Post subject: Re: Misfire - now fixed, but comments appreciated
Posted: Fri Jul 26, 2013 9:01 pm 
Technical Contributor
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Age: 53

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Ride: 96 XH/97 EL

Location: South Coast
NSW, Australia

3 IIRC, it's bolted/screwed in from underneath.

Someone confirm ??

 

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96 XH Longreach 'S': LPG, Alarm, 3.23:1 LSD, Cruise, Trip Comp, ABS, Power Windows, Mid Series Dome Lt, Climate Ctrl
97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

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 Post subject: Re: Misfire - now fixed, but comments appreciated
Posted: Mon Jul 29, 2013 12:22 pm 
Parts Gopher
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Age: 53

Posts: 74

Joined: 17th Sep 2012

Gallery: 24 images

Ride: XH Ute

Location: Townsville
QLD, Australia

Thanks Ranga and Snap.

1 it was black, so I reckon it was some carbon that broke loose, time for a decoke perhaps.
2 It seems to be sealing ok now, but I'll keep an eye on it
3 I was talking to a bloke at the weekend and can now confirm that it is bolted in (thankfully I didn't use too much force trying to lever it out)
4 Until something actually catches fire I doubt I'll ever learn.
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