lumpy and not very good acceleration

[kernowrob]

Hi, another question, I have recently removed a piper X induction kit due to the car becoming very lumpy when accelerating, i have put the original air filter back on and its still doing it... could it be the leads or something similar.

thanks in advance....

rob

:scratchchin:

[Olly P]

With the car running, pull the plug off the maf sensor, if its ok the car should stall straight away.
Was the filter an oil one?
If so the maf could be covered in it.
I think people use brake cleaner to spray the maf wire.

[scoobyDAZZA]

pipercross is oil based

as olly said :)

[kernowrob]

hi, i have just checked the maf sensor, disconected it with the engine running and it stalled, so maybe its not the maf sensor? spoken to roger collins in probus today (what a top bloke!) and he said he will try and look at it tommorrow! I'll try and clean the sensor today and see if it makes a difference! thanx for your help

[Mr H]

try reseting the ecu as you have run a induction kit your car has been running slightly lean for a while . now you are back on origional air box you are getting less air therefore more fuel eventhough you havnt altered the fuel. clean the maf with carb cleaner make sure it says on the can sensor safe
then reset the ecu drive hard for about 10 miles if it aint cured within 200mile ie 1tank of fuel take it to garage hope this helps

[kernowrob]

hmmm cleaned the sensor, reset ECU, drove it and its now worse, how long does the ecu take to sort itself out?? is it likely to get better the more i drive it ??

[beachsleeper]

Hi, another question, I have recently removed a piper X induction kit due to the car becoming very lumpy when accelerating, i have put the original air filter back on and its still doing it... could it be the leads or something similar.

thanks in advance....

rob

:scratchchin:
Lumpy or missing ?

[wideybrook]

I think the best thing to do is to take the car to a garage who knows their stuff and get them to look at it...

Driving a car hard with a potential fault can and often break it!:annoying_cut:

and garages are littered with do it yourself repairs gone wrong

Forgot to ask where is Probus?

[cyberfella]

Forgot to ask where is Probus?

Wideybrook - Probus is on the road out of Truro going towards St Austell. The new dual carriageway kind of bypasses it nowadays, so you'd miss it if you stayed on main roads. you gotta take the turn off by what used to be a mazda dealership (dunno what it is these days).

To everyone else who doesn't already know - Regarding Pipercross Induction Kits - They are only "oil based" if you spray the dirt retention spray on them. They are foam based, which unlike other oiled paper style ones makes them better suited to imprezas and their MAF sensors. I've run two pipercross filters over the past year with no problems. It annoys me that oil retention spray is provided with them though, they must f*****g know it contaminates the MAF wire by now?!! :ranting:See Carl Sorensen in Faraday Mill for more more advice on induction kits and the filtration offered by them (or not as the case me be!)

You do need to reset the ECU when altering the induction though. It's easy. anyone want to know how, just PM me or do a search on SIDC forums. Worth diagnosing ECU at the same time. This is easy too and is a similar procedure to resetting the ECU.

Running Lean using induction Kits? Doubtful given that standard jap wrx's run richer the more hammer you give them (generally). If you want reassurance that it isn't going to lean out and kaboom, a) use octane boost from Carl + Sainsburys super 97 to affordably get the fuel RON as close to 100 as poss, and b) punt a few quid of your hard-earned on a rolling road test down at Alan Jeffery's place in Plympton - he'll give you a graph of your Air/Fuel Ratio. My 95 WRX runs so rich after 6000RPM that the lamdba flatlines. I did upgrade my fuel pump to a higher flow rate one though - this may be a contributing factor. Personally, I'd rather run rich at 6-7000 rpm than lean, it's more likely to make the gear changes go... :flamethrower:

[kernowrob]

hi all, thanks for all your advice, eventually got it booked into Vospers as its still under warranty and they changed the maf sensor and some other sensor for the exhaust, and its sooooo great to have it back sorted, had some fun in the Mazda 2???? diesel they gave me as a courtesy car -- brand new ! got whiplash as soon as i got back into the scooby !!!!