S14 running problems - over fueling and stuttering/spluttering between 3000-5500rpm - Drifting forum

matt22robbins · 13-06-2008, 21:06

Hi guys,

anybody in the westmidlands about this weekend to lend a hand and take a look at my ride.

mods so far to engine are

FMIC, HKS EVC, straight thru exhaust, de cat, air filter, norris design fast road engine,

suddenly devloped this issue where i can smell fuel inside the car, its using a lot more than usual, im now getting 8-10 mpg and when driving between 3000-5500rpm i get this stuttering/spluttering thru the system

ive no idea whats wrong but need to get it fixed before i can consider getting it remapped.

also has anyone any suggestions for next level of mods, got up to £2000 to spend.

if you can offer help can always give me a call on 07920853579 saturday / sunday if ive not responded to pm's as i dont have a pc at home.

cheers

matt

jon1200 · 13-06-2008, 21:12

Could it be you oxygen sensor?

islander · 13-06-2008, 21:37

try you fuel tank for leaks, pressure looses in the hoses `so maybe causing fuel cut?

steve_fctuning · 15-06-2008, 15:45

def sounds like some kinda fuel leak, especially if you can actually smell the fuel mate.
check injector o-ring seals, may be worn? have you ever had any of the fuel pipes off before? perhaps maybe by the fuel filter, if there not clamped back tight or fresh clips used then sometimes, and I say sometimes, they can weep slightly and as it evaporates quickly it can sometimes make it hard to see but when driving and the engine and fuel system is more pressurised underload you can then notice the leak more.

look carefully dude.

Mattias · 15-06-2008, 15:54

major boost leak?

steve_fctuning · 15-06-2008, 15:55

mm yeah. good point, is the car loosing alot of power? you got a guage plumbed in?

matt22robbins · 26-06-2008, 16:16

Hi guys,

no i dont have a gauge plumbed in

have replaced the exhaust manifold as i found a crack in that, but the problem is still there. Will check the fuel, injectors, etc for leaks this weekend and see if i find anything then

cheers

Matt

BanjoMaster · 26-06-2008, 17:08

Most likely your lambda sensor. That's what was wrong with mine.

steve_fctuning · 27-06-2008, 17:04

you sorted out the possible fuel leak mate? you checked around the fuel pipes going into the rail, when they pressure up they expand. Maybe one has a slight split in it, especially if you actually SMELLING fuel.

13-06-2008, 21:06	#1 (permalink)
matt22robbins tail slider Join Date: Mar 2008 Posts: 105	S14 running problems - over fueling and stuttering/spluttering between 3000-5500rpm Hi guys, anybody in the westmidlands about this weekend to lend a hand and take a look at my ride. mods so far to engine are FMIC, HKS EVC, straight thru exhaust, de cat, air filter, norris design fast road engine, suddenly devloped this issue where i can smell fuel inside the car, its using a lot more than usual, im now getting 8-10 mpg and when driving between 3000-5500rpm i get this stuttering/spluttering thru the system ive no idea whats wrong but need to get it fixed before i can consider getting it remapped. also has anyone any suggestions for next level of mods, got up to £2000 to spend. if you can offer help can always give me a call on 07920853579 saturday / sunday if ive not responded to pm's as i dont have a pc at home. cheers matt

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13-06-2008, 21:12	#2 (permalink)
jon1200 spl dori master Join Date: May 2007 Location: Blackpool Posts: 466	Could it be you oxygen sensor?

13-06-2008, 21:37	#3 (permalink)
islander gone wrong Join Date: Mar 2008 Location: the moon Posts: 910	try you fuel tank for leaks, pressure looses in the hoses `so maybe causing fuel cut?

15-06-2008, 15:45	#4 (permalink)
steve_fctuning touge runner Join Date: May 2007 Location: London Posts: 160	def sounds like some kinda fuel leak, especially if you can actually smell the fuel mate. check injector o-ring seals, may be worn? have you ever had any of the fuel pipes off before? perhaps maybe by the fuel filter, if there not clamped back tight or fresh clips used then sometimes, and I say sometimes, they can weep slightly and as it evaporates quickly it can sometimes make it hard to see but when driving and the engine and fuel system is more pressurised underload you can then notice the leak more. look carefully dude.

15-06-2008, 15:54	#5 (permalink)
Mattias spl dori master Join Date: Feb 2007 Location: Sittingbourne, kent Posts: 393	major boost leak?

15-06-2008, 15:55	#6 (permalink)
steve_fctuning touge runner Join Date: May 2007 Location: London Posts: 160	mm yeah. good point, is the car loosing alot of power? you got a guage plumbed in?

26-06-2008, 16:16	#7 (permalink)
matt22robbins tail slider Join Date: Mar 2008 Posts: 105	Hi guys, no i dont have a gauge plumbed in have replaced the exhaust manifold as i found a crack in that, but the problem is still there. Will check the fuel, injectors, etc for leaks this weekend and see if i find anything then cheers Matt

26-06-2008, 17:08	#8 (permalink)
BanjoMaster dorifto kingu! Join Date: Jul 2004 Location: Ebisu in a monsoon! Posts: 997	Most likely your lambda sensor. That's what was wrong with mine.

27-06-2008, 17:04	#9 (permalink)
steve_fctuning touge runner Join Date: May 2007 Location: London Posts: 160	you sorted out the possible fuel leak mate? you checked around the fuel pipes going into the rail, when they pressure up they expand. Maybe one has a slight split in it, especially if you actually SMELLING fuel.