Dr.Rock Posted May 19, 2007 Share Posted May 19, 2007 Howdy I bought my first (working) subie last december and its been a blast, since i got it i've replaced the stock air filters with k&n air filters. recently it has started to lag a little when i am starting, it acts like i am not giving enough gas when i let off the clutch, but its an automatic. anyone know what might be causing this? I have also been thinking a bit about lifting it, anoyone know where i can get a lift kit for my new roo? any advice would be much appreciated, thanks! heres a pic Quote Link to comment Share on other sites More sharing options...
86BRATMAN Posted May 19, 2007 Share Posted May 19, 2007 There are some posts concerning the hesitation problems. Some causes can be knock sensor, o2, maf, bad plug wires, and an extremely rare to subaru bad torque convertor. Do you have a check engine light? Any other symptoms? How does the car act if you floor it from a stop? BTW... Nice looking car. Look in the Offroad forum. And search for entries like "impreza lift" "outback struts" "king springs" and stuff of that nature. Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted May 19, 2007 Share Posted May 19, 2007 Does your vehicle have a MAF? Sometimes the oil from oiled air filters will get on the maf wires and cause issues. Quote Link to comment Share on other sites More sharing options...
Dr.Rock Posted May 19, 2007 Author Share Posted May 19, 2007 Whats a maf? the check engine light came on for a little while after i replaced the second filter that is right next to the intake. It doesnt lag all the time, usually if i stomp the gas at a stop it will lag but not quite as bad. i've found that letting it roll forward a few feet befor hitting the pedal usually helps the lag or completely eliminates it. the lag didnt start immediately after i replaced the filter, it took a month or so befor it started lagging Quote Link to comment Share on other sites More sharing options...
nipper Posted May 19, 2007 Share Posted May 19, 2007 Go back to the regular air filter. The electronics really does not like the aftermarket air filters, as they allow oil and dirt to get on the sensors. Cars since the mid 90's have been enginered to get every bit of power they can get out of stock configuration. They breath very well, and anything that one usually does to try to improve something makes it worse. There are plenty alot of threads here of the aftermarket filters giving running problems. Firts step is to go back to the stock filter and see what happens. Hopefully you did not foul the electronics too badly. nipper Quote Link to comment Share on other sites More sharing options...
Dickensheets Posted May 19, 2007 Share Posted May 19, 2007 Replace the plug wires first. Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted May 19, 2007 Share Posted May 19, 2007 Whats a maf?The MAF is mass air flow sensor. If yours has one you'll see it in the intake tube shortly after the air filter. It has a heated wire and a sensor wire and tell the ECU the mass of air flowing into the engine. Not all Suby's have MAF's; Subaru and other makers switched on and off to other methods including using a MAP (manifold absolute pressure) since it's less fussy than a MAF and I don't know it might be cheaper. Anyway, sometimes oiled air filters can 'release' some of their oil into the air intake stream and it builds up on the MAF. Then this oil kind of acts like an insulator to the heater and sensor wires and results in an erroneous reading. This can happen over time as small amounts of oil get released. You could try a MAF cleaner, but please don't touch the wires with a qtip or anything. However, the air filter may not be causing your problem. If you can get that code read (hopefully it's one that got stored in history if the CEL isn't on right now) that would probably go a long way to figuring out the problem. There are lots of other things that could cause these symptoms. Quote Link to comment Share on other sites More sharing options...
Dr.Rock Posted May 20, 2007 Author Share Posted May 20, 2007 well, i replaced the first filter that is right befor the maf almost immediately after i got the car. the problem never started untill i replaced the second air filter. and even then it took some time, based on some replies i am starting to think its an airflow problem. i recently checked the price of maf's and i am hoping to god that its not the problem. Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted May 20, 2007 Share Posted May 20, 2007 Hm...yah I wasn't sure what you meant by first and second filter? Quote Link to comment Share on other sites More sharing options...
Dr.Rock Posted June 7, 2007 Author Share Posted June 7, 2007 8 bucks and 4 spark plugs later shes back to her old self. Quote Link to comment Share on other sites More sharing options...
nipper Posted June 7, 2007 Share Posted June 7, 2007 8 bucks and 4 spark plugs later shes back to her old self. Funny how that works. Great to hear. nipper Quote Link to comment Share on other sites More sharing options...
Andyjo Posted June 7, 2007 Share Posted June 7, 2007 8 bucks and 4 spark plugs later shes back to her old self. i bet your next problem will be spark plug related :-\ sorry.. that's just how my OBS treated me.. i give her something new and good.. .and it threw it right up Quote Link to comment Share on other sites More sharing options...
nipper Posted June 7, 2007 Share Posted June 7, 2007 i bet your next problem will be spark plug related :-\sorry.. that's just how my OBS treated me.. i give her something new and good.. .and it threw it right up Blu is simple. Once a year spend XXX.XX (and the first number is NOT 1-4) and hes happy for the year. Odd though how he can smell money. When i get my settlelment check, i'll have to walk to the bank, i dont want him smelling that nipper Quote Link to comment Share on other sites More sharing options...
86BRATMAN Posted June 7, 2007 Share Posted June 7, 2007 When i get my settlelment check, i'll have to walk to the bank, i dont want him smelling that If you drive him, every conceivable problem that has ever been discussed on this board will occur... Twice. Quote Link to comment Share on other sites More sharing options...
Finsol Posted June 7, 2007 Share Posted June 7, 2007 Does your vehicle have a MAF? Sometimes the oil from oiled air filters will get on the maf wires and cause issues. This is true. Aftermarket "oiled" filters are no bueno on MAF vehicles like ours, speed density cars work much better with aftermarket "oiled" filters because there is no risk of getting oil on the maf sensors wiring etc. I'd recommend just gutting your box and using a stock filter. Quote Link to comment Share on other sites More sharing options...
Finsol Posted June 7, 2007 Share Posted June 7, 2007 Does your vehicle have a MAF? Sometimes the oil from oiled air filters will get on the maf wires and cause issues. This is true. Aftermarket "oiled" filters are no bueno on MAF vehicles like ours, speed density cars work much better with aftermarket "oiled" filters because there is no risk of getting oil on the maf sensors wiring etc. I'd recommend just gutting your box and using a stock filter. edit: Didn't bother reading through the thread, great to hear ya fixed it. Quote Link to comment Share on other sites More sharing options...
Dr.Rock Posted June 24, 2007 Author Share Posted June 24, 2007 ok so now shes back to the whole hesitation thing, and recently i've noticed a nice whistleing sound when she revs over 4k it climbs in pitch till the shift then quites down again. Since my last update I've cleaned the maf and done the whole sea foam thing, the pcv valve would not suck the sea foam through so i ended up pouring some in while the car was off into the valve opening, got a lot of smoke initially but alost none after the whole 5 minute wait then drive around portion of the procedure. any info would be rad, thanks in advance. Quote Link to comment Share on other sites More sharing options...
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