Author Topic: U13 misfire, running rough... HELP!  (Read 6731 times)

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Offline Budgie

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U13 misfire, running rough... HELP!
« on: Jan 5, 2010, 09:43AM »
Hey all,

As some of the Vic guys will know, my U13 started to run strangely the day before yesterday (out of the blue).

When under 3000rpm in all gears under load, it would feel as if it was massively down on power and sound like its missing or running on only 3 cylinders.

Its fine when cold, but after 5mins or so, once warmed up the misfires occurs.  If I push it a bit harder, say past 3,000rpm in 2nd when accelerating its will 'come good' after that point and power kicks in like its got a turbo and feels totally normal, then change up into 3rd and be under say 3k and it bogs down and miss-fires again!

Its also fine when at a cruising speed, at a low throttle opening .... say 100kmph in 5th, no sign of any issues, but once you hit a steeper hill and put your foot down a bit, it will miss a little until you back off again.

Now, I'm yet to check anything really. I have taken the dist cap off and cleaned the rotor and connections inside the cap and that didn't do anything, plus it was squeaky inside there. Also, the distributor is not leaking a drop of oil (the car does not have any oil leak to speak off actually!).

I'm thinking maybe airflow meter or something fueling related...

Ideas guys?
« Last Edit: Jan 5, 2010, 09:49AM by Budgie »
dont piss me off with your pillarless shit captain snappy wrist

Offline Budgie

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Re: U13 misfire, running rough... HELP!
« Reply #1 on: Jan 6, 2010, 10:51PM »
Right...

Number 2 plug lead was cracked where it sits down inside the head, between the two cams (nice and snug, and also nice and hot!) Not the lead itself, but its solid plastic casing.  Well, they are original nissan leads it seems, so 144,500km is good!!

Replaced with a set of NGK's for $99 from Burson's in West Heidelberg.
dont piss me off with your pillarless shit captain snappy wrist

Offline Colby

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Re: U13 misfire, running rough... HELP!
« Reply #2 on: Jan 7, 2010, 09:34AM »
Glad it wasnt anything too nasty... although $100 for leads is a fair bit, are they performance at all or just expensive because they have the plastic shaft?

Offline Budgie

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Re: U13 misfire, running rough... HELP!
« Reply #3 on: Jan 7, 2010, 10:17AM »
expensive because of the long plastic shaft mate, with the seal on the top and all 4 are different lengths.

$99 is cheap, everywhere else wanted $130+ !!
dont piss me off with your pillarless shit captain snappy wrist

Offline SleepaTi

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Re: U13 misfire, running rough... HELP!
« Reply #4 on: Jan 7, 2010, 11:26AM »
oh fudgie! supercheap can get 9mm eagles for $80 in any colour u want
NO! it's NOT a fucking SR20!!

Offline Budgie

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Re: U13 misfire, running rough... HELP!
« Reply #5 on: Jan 7, 2010, 06:17PM »
I boycott super-cheap, I know that sounds gay, but I can't stand them!

NGK is all good :)
dont piss me off with your pillarless shit captain snappy wrist

Offline SleepaTi

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Re: U13 misfire, running rough... HELP!
« Reply #6 on: Jan 7, 2010, 06:38PM »
yeah they do the job nicely

mine are already starting to break down (ebay shit) so loox like i'm up for a set too :o
NO! it's NOT a fucking SR20!!

Offline JelloBello

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Re: U13 misfire, running rough... HELP!
« Reply #7 on: Jan 8, 2010, 09:28AM »
I agree budgie, only reason I buy anything from supercheap is because I work there and get discount :P

http://www.gccorp.com.au/automotive/product_info.php?cPath=22_80_82&products_id=178 :)

1994 u13 SSS Attesa ftw. Project thread here
13.876 @ 98.83mph

Offline Budgie

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Re: U13 misfire, running rough... HELP!
« Reply #8 on: Jan 8, 2010, 04:40PM »
Do those fit KA24DE motors as well as SR20DE motors?
dont piss me off with your pillarless shit captain snappy wrist

Offline SleepaTi

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Re: U13 misfire, running rough... HELP!
« Reply #9 on: Jan 8, 2010, 08:53PM »
Suits:
- N14 SR20DE
- RNN14 GTi-R SR20DET
- U12, U13, W10, N30 SR20DET (With SR20DE distributor fitted)
NO! it's NOT a fucking SR20!!

Offline Budgie

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Re: U13 misfire, running rough... HELP!
« Reply #10 on: Jan 8, 2010, 09:25PM »
Question still stands! :P

Seeing as that site caters to the SR conversion crowd quite a lot, probably the HNU13 SR's I reckon.
dont piss me off with your pillarless shit captain snappy wrist

Offline SleepaTi

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Re: U13 misfire, running rough... HELP!
« Reply #11 on: Jan 9, 2010, 12:54PM »
24de tubes are shorter

24de 147mm
sr20 158mm - taller rocker cover for the extra valve train shit
NO! it's NOT a fucking SR20!!

Offline JelloBello

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Re: U13 misfire, running rough... HELP!
« Reply #12 on: Jan 11, 2010, 12:56PM »
ahh sorry budge, for some reason I thought you were talking about your sr u12!
1994 u13 SSS Attesa ftw. Project thread here
13.876 @ 98.83mph