spluttering.... is itmy m.a.f. sensor?
28 June 2007, 09:36 PM
#31
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Andy FFS,
It's Wynn's Fuel Injecton Intake & Carb Cleaner from Halfords and other places.
It has a WD40 Type Straw to get in there.
I wouldn't tell you donkey dirt ( remember me, I offerered to help lend your pal a set of wheels??)
On the subject of your K&N Filter, as I said, gentle brush both sides to get rid of the crap.
On the top side ( the one with the colour) spray a bit of the can on also (just a bit) it will blow through in a clean way.
Do as I suggest ( if you want to) in the first reply to your post.
I am confident it will help.
Good Luck, if it works, that's a cheap drwaing of my Scoob from you
Regards Alan MaC
It's Wynn's Fuel Injecton Intake & Carb Cleaner from Halfords and other places.
It has a WD40 Type Straw to get in there.
I wouldn't tell you donkey dirt ( remember me, I offerered to help lend your pal a set of wheels??)
On the subject of your K&N Filter, as I said, gentle brush both sides to get rid of the crap.
On the top side ( the one with the colour) spray a bit of the can on also (just a bit) it will blow through in a clean way.
Do as I suggest ( if you want to) in the first reply to your post.
I am confident it will help.
Good Luck, if it works, that's a cheap drwaing of my Scoob from you
Regards Alan MaC
whoa whoa whao slow down there horsey
alan, wasnt trying to be **** i hope you agree. you just mentioned about carb cleaner, and the guys in there started filling my head with all sorts.
the filter advice defo noticed, but after taking the maf housing apart earlier... im very uneasy about cleaning it. i think as the cars a my99 id rather change the sensor and lcean the filter out to be safe.
want trying to undermime you fella. please love me still
serious though, i do appreciate your advice, but tomorrow im gonna watch someone do it for a few quid than me break it
28 June 2007, 10:15 PM
#33
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As I understand it the problem with cleaning a maf is that it will be covered with very adherent soot for which there is no suitable solvent so cleaning requires brushing the area which probably destroys the delicate filament. When my maf went the symptoms came on gradually over a couple of months, started when engine was cold. The engine raced at 1500 idle for a few minutes then when stopping at traffic lights irregular idle.
Other point, once I replaced the maf it took a little time for the symptoms to completely disappear although the irregular idle was cured immediately, I guess any electrical component burning in.
Good luck
Other point, once I replaced the maf it took a little time for the symptoms to completely disappear although the irregular idle was cured immediately, I guess any electrical component burning in.
Good luck
29 June 2007, 12:28 AM
#36
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...And the Impreza has both (MAF and MAP, well ok, not quite, the latter is just a pressure sensor that is switched via a solnoid to detect ambient pressure, then switched to measure intake pressure which is used to control boost pressure) 
One question, Choc....has the car EVER ran ok with that dumpvalve fitted??
One question, Choc....has the car EVER ran ok with that dumpvalve fitted??
Last edited by Shark Man; 29 June 2007 at 12:32 AM.
29 June 2007, 04:37 AM
#37
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...And the Impreza has both (MAF and MAP, well ok, not quite, the latter is just a pressure sensor that is switched via a solnoid to detect ambient pressure, then switched to measure intake pressure which is used to control boost pressure)
One question, Choc....has the car EVER ran ok with that dumpvalve fitted??
One question, Choc....has the car EVER ran ok with that dumpvalve fitted??
its just like a general lumpyness at the mo.
29 June 2007, 11:07 AM
#38
yes. had it fitted a couple of months at least now and has always seemed fine. was thinking possibly the combination of dumpvalve and decat werent helping, but after ive changed the maf, il see what happens until next friday when the proper service is due.
its just like a general lumpyness at the mo.
its just like a general lumpyness at the mo.
Lazy O2 sensor, does not heat up quickly enough using it's heater & is gradually warmed by the exhaust gas, Once up to temp it will start adjusting the mixture correctly, If you get the car nice & hot does it still do it ? Or are the symptons only when cold/Cool ??
Dean
29 June 2007, 01:54 PM
#39
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update...
just got back from scoobybits. jase was a little busy but found time for his no. 1 fav customer
swapped the m.a.f. sensor, and give the idle control valve a clean out with some brake/clutch cleaner. swears by it apparently - good enough for me
tried starting her up. lots of splutter while she coughed the cleaner out the icv. eventually started.... and flumph, stalled straight away. tried again, stalled again.
"hmmm, thats unusual" jase said
popped the idle valce off again, had a fiddle and noticed it was erm, fecked. wasnt moving in and out much, possibly due to a weak spring over time, or not been cleaned.
he ran to his "den" found another used one, popped it on after a clean, and hey presto, started up straight away.
let the car idle for 10 mins while me and jase conversed over several subjects inc. my service next week and also having my new suspension fitted.
drove away, and it was like a different car. admittedly still a little lumpy, especially when sat at the lights or junctions, but so much better than before. thinking of replacing the panel filter too, see if that helps.
only difference to before all this started is when the car idles, it does so at about 1200 revs, and not about 750-800 as before. smooth on set off though, and the clutch doesnt feel different.
will see how she drives for the week before kris does the service next friday.
all in new m.a.f. sensor and a used idle control valve was under £120 all in, so happy enough. genuine parts too which puts my mind at rest.
all jase recommended was to clean out the idle control valve maybe once a month with brake/clucth cleaner, keep it sweet.
andy
just got back from scoobybits. jase was a little busy but found time for his no. 1 fav customer
swapped the m.a.f. sensor, and give the idle control valve a clean out with some brake/clutch cleaner. swears by it apparently - good enough for me
tried starting her up. lots of splutter while she coughed the cleaner out the icv. eventually started.... and flumph, stalled straight away. tried again, stalled again.
"hmmm, thats unusual" jase said
popped the idle valce off again, had a fiddle and noticed it was erm, fecked. wasnt moving in and out much, possibly due to a weak spring over time, or not been cleaned.
he ran to his "den" found another used one, popped it on after a clean, and hey presto, started up straight away.
let the car idle for 10 mins while me and jase conversed over several subjects inc. my service next week and also having my new suspension fitted.
drove away, and it was like a different car. admittedly still a little lumpy, especially when sat at the lights or junctions, but so much better than before. thinking of replacing the panel filter too, see if that helps.
only difference to before all this started is when the car idles, it does so at about 1200 revs, and not about 750-800 as before. smooth on set off though, and the clutch doesnt feel different.
will see how she drives for the week before kris does the service next friday.
all in new m.a.f. sensor and a used idle control valve was under £120 all in, so happy enough. genuine parts too which puts my mind at rest.
all jase recommended was to clean out the idle control valve maybe once a month with brake/clucth cleaner, keep it sweet.
andy
29 June 2007, 03:31 PM
#40
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left the car for an hour and went to pick the mrs up. it idles at 800revs again now
no idea why it changed suddenly. still lumpy though, so im wondering if its another sensor that needs checking. ecu reset brings nothing up. may try a new panel filter soon, after the service next week.
no idea why it changed suddenly. still lumpy though, so im wondering if its another sensor that needs checking. ecu reset brings nothing up. may try a new panel filter soon, after the service next week.
29 June 2007, 04:11 PM
#41
left the car for an hour and went to pick the mrs up. it idles at 800revs again now no idea why it changed suddenly. still lumpy though, so im wondering if its another sensor that needs checking. ecu reset brings nothing up. may try a new panel filter soon, after the service next week.
no idea why it changed suddenly. still lumpy though, so im wondering if its another sensor that needs checking. ecu reset brings nothing up. may try a new panel filter soon, after the service next week.The last time i had troubles like this it turned out to be the TPS Throttle Position Sensor. When i checked the open & closed voltages they were above the limits, they should be something like .04 Volts closed & .07 Open with a +- .002
Once i had set it the issue went away for months, although i did get a brief TPS errror code on the Cel.
You haven't adjusted the trottle cable recently have you ??
Dean
29 June 2007, 04:12 PM
#42
left the car for an hour and went to pick the mrs up. it idles at 800revs again now no idea why it changed suddenly. still lumpy though, so im wondering if its another sensor that needs checking. ecu reset brings nothing up. may try a new panel filter soon, after the service next week.
no idea why it changed suddenly. still lumpy though, so im wondering if its another sensor that needs checking. ecu reset brings nothing up. may try a new panel filter soon, after the service next week.You could always unplug the lambda/O2 Sensor then go for a drive & see if that improves the lumpiness/idle.
It won't hurt it but may throw a Cel eventually
Dean
29 June 2007, 05:12 PM
#43
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could do. not sure how to access it though lol. where abouts on the my99 is the lambda sensor, as i know theres more than one size plug so to speak...
29 June 2007, 10:07 PM
#44
Dean
04 July 2007, 04:02 PM
#45
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after seeing what the cars been like for the past few days, ive noticed predominantly there is like a flat spot/lack of power around the 2k revs/30mph mark in 3rd gear, and 2krevs/40mph mark in 4th gear. you take the foot off the acc. pedal slightly and the car seems to slow hesitate more than anywhere else on the rev range.
giving her some beans and generally shes fine, but lower down, you can feel the lumpy ride.
was on the blower to jase just now, and he thinks the next thing to check is the lambda sensor, as i believe he popped on a second hand one he had lying about when putting my downpipe on. the original was knackered he said, so i was appreciative of this.
jase said £120+v.a.t. from a dealers is the general going price for a lambda sensor, anyone know if theyre readily available cheaper elsewhere, or is this a dealer part only. not looking to seems a cheap skate, as we all know the dealerships can be £££ happy some times.
also im gonna have my brakes cleaned out, as when inching along in traffic, i can hear a squeeking noise coming from the drivers side rear, sounds like an old rusty bike wheel or something. if somethings sticking i dont wanna end up with warped brake discs and foofed pads.
so top re-cap, thus far, idle control valve replaced (albeit for second hand one) which stopped the spluttering from cold. m.a.f. replaced, mainly as a precaution, as the cars a my99, and i now know the last time it was changed for piece of mind.
so prices for the lambda?
thanks for your input so far guys.
andy
p.s. just found this on Cheap Tyres Discount Tyres & Japanese Import Car Parts Spares Tuning Performance ::
CAMSKILL PRODUCTS Lambda Sensor- Oxygen Sensor 3 Wire - EJ205 EJ205 1997 to 2000 : £89.00 : Subaru Impreza Turbo Parts, Tuning, Spares & Accessories : Engine - Misc -
any good, for the sake of saving probably £60ish
giving her some beans and generally shes fine, but lower down, you can feel the lumpy ride.
was on the blower to jase just now, and he thinks the next thing to check is the lambda sensor, as i believe he popped on a second hand one he had lying about when putting my downpipe on. the original was knackered he said, so i was appreciative of this.
jase said £120+v.a.t. from a dealers is the general going price for a lambda sensor, anyone know if theyre readily available cheaper elsewhere, or is this a dealer part only. not looking to seems a cheap skate, as we all know the dealerships can be £££ happy some times.
also im gonna have my brakes cleaned out, as when inching along in traffic, i can hear a squeeking noise coming from the drivers side rear, sounds like an old rusty bike wheel or something. if somethings sticking i dont wanna end up with warped brake discs and foofed pads.
so top re-cap, thus far, idle control valve replaced (albeit for second hand one) which stopped the spluttering from cold. m.a.f. replaced, mainly as a precaution, as the cars a my99, and i now know the last time it was changed for piece of mind.
so prices for the lambda?
thanks for your input so far guys.
andy
p.s. just found this on Cheap Tyres Discount Tyres & Japanese Import Car Parts Spares Tuning Performance ::
CAMSKILL PRODUCTS Lambda Sensor- Oxygen Sensor 3 Wire - EJ205 EJ205 1997 to 2000 : £89.00 : Subaru Impreza Turbo Parts, Tuning, Spares & Accessories : Engine - Misc -
any good, for the sake of saving probably £60ish
Last edited by chocolate_o_brian; 04 July 2007 at 04:10 PM. Reason: added link for lambda sensor
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