Hesitation and lethargic below 3k
17 February 2019, 10:17 AM
#1
Hesitation and lethargic below 3k
as per the title really. My 06 Hawk WRX 2.5 had an intermittent issue where it would feel very lethargic and hesitant below 3k revs - mainly off boost driving round town on partial throttle. It seems to be a more regular issue now. Once you plant it, it boosts fine, and drives well with no misfires etc but at lower revs it feels awful and on a couple of occasions the revs have dipped quite low.
its a completely standard car, not even a PPP map.
Only mod is a cosworth panel filter and this was happening before that went in. I’m not quite sure where to start with it. It has no warning lights, no smoke, no odd smells, no noises, oil and coolant seem okay.
Was thinking maybe a snall boost leak leak or a vac leak? Alternatively a maf maybe...
thoughts?
its a completely standard car, not even a PPP map.
Only mod is a cosworth panel filter and this was happening before that went in. I’m not quite sure where to start with it. It has no warning lights, no smoke, no odd smells, no noises, oil and coolant seem okay.
Was thinking maybe a snall boost leak leak or a vac leak? Alternatively a maf maybe...
thoughts?
17 February 2019, 02:29 PM
#4
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given the issues with the 2.5 and you have already changed plugs I'd start here.
that's assuming you have had the fault codes read on the car and there aren't any
18 February 2019, 07:00 AM
#6
19 February 2019, 01:42 PM
#7
to update. read the codes today - nothing stored, or currently present....
The car is booked in at TDR in a couple of weeks anyway for a few parts to be fitted, so at the same time the lads are going to give it a once over to check for vac/boost leaks. They're also going to do a leakdown test and compression test it for peace of mind. So we shall see....
The car is booked in at TDR in a couple of weeks anyway for a few parts to be fitted, so at the same time the lads are going to give it a once over to check for vac/boost leaks. They're also going to do a leakdown test and compression test it for peace of mind. So we shall see....
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13 March 2019, 08:31 AM
#8
To update this further.... for anyone interested who may have similar symptoms.
No codes found in the car.
Compression test and leak down test carried out at TDR - all is good and healthy thank god....
No obvious vac / boost leaks.
Plugs all good - as they're new. No misfires either.
Suggestion now is definitely MAF, so looking to either replace with one of these pups https://www.importcarparts.co.uk/par...y=&searchPart= or perhaps clean this one first and see how it goes.....
No codes found in the car.
Compression test and leak down test carried out at TDR - all is good and healthy thank god....
No obvious vac / boost leaks.
Plugs all good - as they're new. No misfires either.
Suggestion now is definitely MAF, so looking to either replace with one of these pups https://www.importcarparts.co.uk/par...y=&searchPart= or perhaps clean this one first and see how it goes.....
14 March 2019, 01:44 PM
#9
MAF now cleaned at work today... a good liberal spray with electrical contact solvent cleaner. And reinstalled..... I'll feedback if a clean seems to have done it.... Wasn't immediately obvious if the wires were dirty or not...but I don't think you'd be able to tell anyway unless they were coated in oil.
It I still have problems, new MAF from ICP it is.
It I still have problems, new MAF from ICP it is.
14 May 2020, 12:31 AM
#12
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