surging all the time - getting annoying now
21 August 2002, 09:39 AM
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okay, maybe it's completely normal, but my my00 surges and hesitates practically all of the time...
okay, maybe a bit of exaggeration, but mostly around 3000rpm, although it can happen at other speeds, and sometimes can be quite pronounced... is this normal - and more importantly - is there a fix?
okay, maybe a bit of exaggeration, but mostly around 3000rpm, although it can happen at other speeds, and sometimes can be quite pronounced... is this normal - and more importantly - is there a fix?
21 August 2002, 10:06 AM
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21 August 2002, 10:41 AM
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tony - no mods at all, it's completely standard... i know there's a general issue with these cars, but i'm not sure if mine is behaving normally?
it surges pretty much all of the time, but 3000rpm is it's most popular time by far. it's weird, there isn't really any pattern to speak of, although it does have a surge/hesitation session each evening when I come off the m'way and tootle along at 30ish
it surges pretty much all of the time, but 3000rpm is it's most popular time by far. it's weird, there isn't really any pattern to speak of, although it does have a surge/hesitation session each evening when I come off the m'way and tootle along at 30ish
21 August 2002, 10:46 AM
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The only thing that i can suggest is that you get the boost solenoid and the wastegate cleaned.... it may be clogged and giving you over boost (pulsing on off which sounds like you have)
Do you feel a loss of power towards the top end thou?
Tony
Do you feel a loss of power towards the top end thou?
Tony
21 August 2002, 01:30 PM
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tony, yes, it's a pulsing type sensention - but only when it's either held, or on mild throttle - as soon as I floor it, it takes off as normal...
i'm north of manchester by the way, approaching preston.
i'm north of manchester by the way, approaching preston.
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21 August 2002, 02:33 PM
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jesus its doing my head in i have a 94 wrx and got a 99 engine put in and its surging the exact same u hold it at 3000 and its like back and foward very slithly its being doing it since i got engine in and iv got new plugs ,leads,afm,cleaned soliend and still the same ,,please help
thanks
thanks
21 August 2002, 03:29 PM
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my idle seems fine - on start up it's a little higher, but steady. - after a few seconds, or a blip it settles and is fine...
forgot to say, that when the thing is doing it's merry little surge/hesitate dance, my boost guage reads completly normal - no spiking at all...
i was hoping for a solenoid clean solution - but maybe that's not going to do it?
forgot to say, that when the thing is doing it's merry little surge/hesitate dance, my boost guage reads completly normal - no spiking at all...
i was hoping for a solenoid clean solution - but maybe that's not going to do it?
21 August 2002, 03:53 PM
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DBM, I dont want to scare you but my uk 99 did that when the MAF was half way sh4gged!!!
Also it might be that you have the 'dodgy' ECU, cant remember the model number but some of the 99-00 ECUs were very poor
Have a look at the ECU (under passenger footwell) and see what Model you have.
If it is under warranty, take it to the dealer and get a select monitor check.
Since I changed my MAF the 'cold run' bit is awful, it surges like a surging thing!
Hope you get it sorted.
Also it might be that you have the 'dodgy' ECU, cant remember the model number but some of the 99-00 ECUs were very poor
Have a look at the ECU (under passenger footwell) and see what Model you have.
If it is under warranty, take it to the dealer and get a select monitor check.
Since I changed my MAF the 'cold run' bit is awful, it surges like a surging thing!
Hope you get it sorted.
21 August 2002, 03:58 PM
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21 August 2002, 04:00 PM
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WRX,
what ecu are you running?
do you still have the original one in or a different one?
The fact is why im asking is that your original engine is a phase 1, your new engine (my99) is a phase 2 and wont be running well on the oringinal ecu due to quite a few differences in it (ie injectors are bigger etc)....
Tony
what ecu are you running?
do you still have the original one in or a different one?
The fact is why im asking is that your original engine is a phase 1, your new engine (my99) is a phase 2 and wont be running well on the oringinal ecu due to quite a few differences in it (ie injectors are bigger etc)....
Tony
21 August 2002, 04:20 PM
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mine still does it with a new MAF and new plugs, cant figure it out, does make part throttle drives a pain in the ****, ive checked the codes with no probs, how does the select monitor differ to the self check with the black connectors?
Cheers
Cheers
21 August 2002, 04:55 PM
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tony its just the block i got everything else is the same its doing the same as the other lads on the site and iv changed afm,plugs.coyels,cleaned soliend,,what else is there i think it mite have something to do with fuel as if its not getting enough petrol
21 August 2002, 06:31 PM
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Well, lessens it, but still noticeable if you're not used to it.
If it's doing this more than usual and there's even the slightest idling problem, I'd swap the MAF (or at least check its output under load).
AFAIK, it shouldn't do this at all when the engine is warm, unless you delight in holding the throttle at precisely the point at which the turbo 'doesn't know' whether to spool up or not (i.e. motorway speeds
) but this should be minimal too. But that's a slightly different movement, and the boost gauge should be wibbling a little 
If it's doing this more than usual and there's even the slightest idling problem, I'd swap the MAF (or at least check its output under load).
AFAIK, it shouldn't do this at all when the engine is warm, unless you delight in holding the throttle at precisely the point at which the turbo 'doesn't know' whether to spool up or not (i.e. motorway speeds
) but this should be minimal too. But that's a slightly different movement, and the boost gauge should be wibbling a little
21 August 2002, 08:09 PM
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tony - thanks for the offer mate! - I wouldn't have a clue where to start!!!
to be honest it's more of an annoyance than anything else. Plus that look passengers give you when it's throwing a wobbler!!!
me: "they all do that apparently"
them: "yeah - sure they do" *my god what has this guy bought...*
to be honest it's more of an annoyance than anything else. Plus that look passengers give you when it's throwing a wobbler!!!
me: "they all do that apparently"
them: "yeah - sure they do" *my god what has this guy bought...*
21 August 2002, 10:01 PM
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My point regarding the MAF is that I wondered if the 'quality' of the replacement MAFs was suspect, mine was fine before the MAF change...now it is really bad but only when cold.
£70 for just the sensor, they used to sell the MAF as a complete assy including the housing iro £300
£70 for just the sensor, they used to sell the MAF as a complete assy including the housing iro £300
22 August 2002, 12:14 AM
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WRX,
you cannot run a phase 2 engine on that ecu you have in there properly its not quite compatable you needed another phase 1 lump really...
Your options are now to go for a MY99 WRX ecu, possably a wiring loom?
You need to speak to someone like Pete Croney at Scoobysport really, but yours looks like a compatability problem.....
Tony
you cannot run a phase 2 engine on that ecu you have in there properly
its not quite compatable you needed another phase 1 lump really...Your options are now to go for a MY99 WRX ecu, possably a wiring loom?
You need to speak to someone like Pete Croney at Scoobysport really, but yours looks like a compatability problem.....
Tony
22 August 2002, 09:18 AM
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I have just had the following troubles with a MY00 PPP,
i started to experience the surging problem on the car a couple of months back and put it down to 'they all do that sir' syndrome, but the other day driving on the motorway the engine check light came on for a couple of mins and went out,
i checked this using the two black plugs under the dask and got error code 23 (MAF Sensor Fault)
I reported this to the dealer and ther checked it out and replaced the MAF and the O2 sensor.
The car is now totally different to drive now the surging has gone it is now alot smoother to drive and more responsive.
Phil G
i started to experience the surging problem on the car a couple of months back and put it down to 'they all do that sir' syndrome, but the other day driving on the motorway the engine check light came on for a couple of mins and went out,
i checked this using the two black plugs under the dask and got error code 23 (MAF Sensor Fault)
I reported this to the dealer and ther checked it out and replaced the MAF and the O2 sensor.
The car is now totally different to drive now the surging has gone it is now alot smoother to drive and more responsive.
Phil G
22 August 2002, 10:55 AM
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@DBM, mostly on part or light throttle i get a feeling like the engine is stumbling, around 2500rpm till 3000rpm, on WOT thru the gears no probs, dont know wether Id call it a hesitation more like a surging, ive not fitted a boost gauge yet so i can say if its the turbo getting confused...
hope this helps, just to recount mines a standard MY00, with a new MAf and plugs and no codes on the Ecu
Cheers
hope this helps, just to recount mines a standard MY00, with a new MAf and plugs and no codes on the Ecu
Cheers
22 August 2002, 10:59 AM
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hmm O2 sensor is not something id thought of most dealers/speacialists always assume its the MAf, would a dodgy O2 sensor give improper readings similar to a Maf prob?
22 August 2002, 02:54 PM
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hmm Nom says the O2 controls or influences cruise, IMHO this is when the surging occurs, on WOT there is no prob... how do i test the O2 sensor, simple method please im not that techy... thx
Cheers
Cheers
22 August 2002, 04:46 PM
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At cruise it should be fluctuating (searching for a stoichometric mix) between 0 and the 'under load' voltage; under load is around 0.89v. I have heard that the sensor sits at a single voltage when it's not working properly... but have no experience of this happening! As to how to measure it without an AF meter of some sort... not too sure there!
Not a very helpful reply - sorry!
Not a very helpful reply - sorry!