fking missfire continues! - not boost leak

s13silvia · 19-12-2006, 21:12

ok i remember i posted bout this while back, but i fitted a boost guage and it boosts to 0.5 psi and that stays steady, but at 5k or so it stops revving and does that brrrrrrr thing again, new sparks/coils needed?!

im REALLY hating this pissing car now......

bigboyballs · 19-12-2006, 21:30

replace plugs, and if you have a few mods, reduce the gap slightly.

hopefully it's this and not coils....

high boost hero · 19-12-2006, 22:18

ive got exactly the same problem. ive put new plugs and reduced the gap by 0.1 of a mm the coils look fine. i think it may be fuel pump but im no expert.

cheers

james anderson · 19-12-2006, 22:19

try the plugs first, when did it last have a service?

high boost hero · 19-12-2006, 23:32

sorry for the hi-jacking your thread but its annoying me aswell this problem. plugs were changed last week belts were done 2000 miles ago i dunno if that makes any difference oil was done about 1000 miles ago i put motul 300v 15w50 fully synthetic. i really need to get this soughted any help much appreciated.

cheers

JJ · 20-12-2006, 05:14

try the plugs and re-gap them on 0.8-0.9mm.....

If that doesnt help....try and swap the coils+coil-loom.

liquidsmoke · 20-12-2006, 08:22

fuel pump.

s13silvia · 22-12-2006, 10:07

well, switched plugs today, and im happy to report its SO much smoother on idle, sounds lovely (im assuming it mustve been running on 3 because it sounded like a peco-big-bore-4'd impreza yesterday, now sounds nice and smooth!

but on the downside!! the missing continues

HERES A POINT!! a prefacelift tank was used when the petrol tank needed replacing, and i think its quite a possibility the prefacelift pump wouldve been switched with it ... could that be causing my woes?!

Leezon · 22-12-2006, 11:06

I think you'v just found the problem matey.. i would have checked the fuel pump when swapping them.. should have stuck a Walbro in there

Maddog1982 · 22-12-2006, 11:10

my prob turned out to be a dodgy ecu

s13silvia · 22-12-2006, 11:30

Quote:

Originally Posted by Leezon

I think you'v just found the problem matey.. i would have checked the fuel pump when swapping them.. should have stuck a Walbro in there

well ill check it out.... though my 'master mechanic' pal has just told me that a fuel pump wont be causing the missfire, and its almost cert to be the coils if ive swapped plugs....

Quote:

Originally Posted by maddawg

my prob turned out to be a dodgy ecu

christ

what is it with s13's, every solution gets more expensive by the minute

its annoying not knowing exactly what to buy! i gotta get discs n pads too... this is an expensive venture!

Maddog1982 · 22-12-2006, 11:49

cost me 20 quid for a new ecu, hopefully fitting the stage 2 chip today, my prob was running lean, it back fires when you let off at low revs

high boost hero · 24-12-2006, 18:52

i found mine to be the fuel pressure regulator so be worth a check if you are still having the problem.

JJ · 24-12-2006, 19:29

change the pump

s13silvia · 24-12-2006, 20:10

Quote:

Originally Posted by high boost hero

i found mine to be the fuel pressure regulator so be worth a check if you are still having the problem.

thanks

Quote:

Originally Posted by 200SX_Freak

change hte fuel pump

thanks again

New200guy · 24-12-2006, 20:40

i am having a slight miss myself. I feel your pain in tracking all this stuff down. so many things to check. i am going to buy two new coils and try swapping them around and see if that fixes the problem. i just binned the warm start solinoid. seems the cars runs a tad better. not sure if that is the butt o meter telling me something. the search still continues

mrjud · 24-12-2006, 20:54

i had this with a s13 2 years ago bought 1 new coil from nissan for 80 pound.
try here for a set of 4 for around 150 great upgrade i had them on my skyline .http://www.nengun.com/engine/splitfi...gnition-system

JJ · 24-12-2006, 22:48

Quote:

Originally Posted by s13silvia

thanks

thanks again

welcome

Vova · 24-12-2006, 23:56

It's not the pump for sure. The pump doesn't "get tired" or runs out (on a stock setup, it operates at ~75% @ WOT), nonsense. The pump either pumps, or doesn't.

The best posiblity is that it's either a sensor (like the CAS) or something electronical after the ECU if it's not the ECU itself!

JJ · 25-12-2006, 00:04

Quote:

Originally Posted by Vova

It's not the pump for sure. The pump doesn't "get tired" or runs out (on a stock setup, it operates at ~75% @ WOT), nonsense. The pump either pumps, or doesn't.

The best posiblity is that it's either a sensor (like the CAS) or something electronical after the ECU if it's not the ECU itself!

Stop talkin bullshite mate

Its a bloody fact fuelpumps pump less when gettin older.....

Explain the fact that a lot of people loose such problems by dropping in an uprated/new fuelpump?
Why do sum people always act like they are sum kind of god, and go completly the other way if its been proven to be the oposite way?

19-12-2006, 21:12	#1
s13silvia Guest Join Date: Apr 2004 Location: Edinburgh/ Dornoch Posts: 8,084	fking missfire continues! - not boost leak ok i remember i posted bout this while back, but i fitted a boost guage and it boosts to 0.5 psi and that stays steady, but at 5k or so it stops revving and does that brrrrrrr thing again, new sparks/coils needed?! im REALLY hating this pissing car now...... Last edited by s13silvia; 19-12-2006 at 21:16.

19-12-2006, 22:18	#3
high boost hero Member Join Date: Aug 2006 Location: under my car Posts: 1,403	ive got exactly the same problem. ive put new plugs and reduced the gap by 0.1 of a mm the coils look fine. i think it may be fuel pump but im no expert. cheers __________________

19-12-2006, 22:19	#4
james anderson Guest Join Date: Oct 2005 Location: dundee Posts: 5,929	try the plugs first, when did it last have a service? __________________ Jamesy

19-12-2006, 23:32	#5
high boost hero Member Join Date: Aug 2006 Location: under my car Posts: 1,403	sorry for the hi-jacking your thread but its annoying me aswell this problem. plugs were changed last week belts were done 2000 miles ago i dunno if that makes any difference oil was done about 1000 miles ago i put motul 300v 15w50 fully synthetic. i really need to get this soughted any help much appreciated. cheers __________________

20-12-2006, 08:22	#7
liquidsmoke Member Join Date: Aug 2003 Location: Cambridge Posts: 8,978	fuel pump. __________________ For Sale: S13 Rear Hatch with XM Spoiler, Part Worn S14 Mintex 1144 Pads

19-12-2006, 21:30	#2
bigboyballs NON-MEMBER Join Date: Sep 2006 Location: Plymouth, Devon Posts: 91	replace plugs, and if you have a few mods, reduce the gap slightly. hopefully it's this and not coils....

22-12-2006, 10:07	#8
s13silvia Guest Join Date: Apr 2004 Location: Edinburgh/ Dornoch Posts: 8,084	well, switched plugs today, and im happy to report its SO much smoother on idle, sounds lovely (im assuming it mustve been running on 3 because it sounded like a peco-big-bore-4'd impreza yesterday, now sounds nice and smooth! but on the downside!! the missing continues HERES A POINT!! a prefacelift tank was used when the petrol tank needed replacing, and i think its quite a possibility the prefacelift pump wouldve been switched with it ... could that be causing my woes?!

22-12-2006, 11:06	#9
Leezon NON-MEMBER Join Date: Dec 2006 Location: Kent Posts: 574	I think you'v just found the problem matey.. i would have checked the fuel pump when swapping them.. should have stuck a Walbro in there

24-12-2006, 18:52	#13
high boost hero Member Join Date: Aug 2006 Location: under my car Posts: 1,403	i found mine to be the fuel pressure regulator so be worth a check if you are still having the problem. __________________

24-12-2006, 20:40	#16
New200guy Guest Join Date: Nov 2006 Location: Hoechstadt a.d. Aisch, Germany Posts: 2,431	i am having a slight miss myself. I feel your pain in tracking all this stuff down. so many things to check. i am going to buy two new coils and try swapping them around and see if that fixes the problem. i just binned the warm start solinoid. seems the cars runs a tad better. not sure if that is the butt o meter telling me something. the search still continues __________________ Just wait until you feel that turbo kick in! It's like being able to get a BJ on command. Whenever you want it, however you want it, as long as you want it and without her complaining and having to come up for air.

24-12-2006, 20:54	#17
mrjud NON-MEMBER Join Date: Nov 2006 Posts: 120	i had this with a s13 2 years ago bought 1 new coil from nissan for 80 pound. try here for a set of 4 for around 150 great upgrade i had them on my skyline .http://www.nengun.com/engine/splitfi...gnition-system

24-12-2006, 23:56	#19
Vova Banned Join Date: Jul 2005 Location: Maastricht, Netherlands Posts: 3,115	It's not the pump for sure. The pump doesn't "get tired" or runs out (on a stock setup, it operates at ~75% @ WOT), nonsense. The pump either pumps, or doesn't. The best posiblity is that it's either a sensor (like the CAS) or something electronical after the ECU if it's not the ECU itself!