18 replies to this topic

[claire6]

Hi, I have a my02 inpreza rx 2.0 na.
Was running fine drove to work in morning all good on way home stalled at lights. When I start back up idles fine for 5 seconds then idle starts Going up and down dramatically.
It is an auto and when pulling up to light's goes to stall only way of saving it is put in neutral snd hold revs up...
Thinking bad fuel as car has sat for 3 weeks on 1/4 tank.
noticed slight pinging on acceleration too.
any ideas?
ive checked vacuum lines.etc.

[migoreng]

Well have you filled up with fresh fuel? 3 weeks of not driving a car is nothing

[claire6]

Not when had issue.i checked all vacuum lines, injector plugs, plug leads cconnections pulled iac off and cleaned it.still same.went and put 20 l of premium and took for good drive still same . jumps from 200-1200rpm up down up down....

[Reevesy]

Sounds like an AFM issue

[claire6]

Where is that located? This is a ej20 na Has pipe located in guard, resonator box then air cleaner is mounted dirctly to throttle body.i cannot see afm.

[Jimbo]

I don't think they run an AFM on those engines. To me, it sounds like a vacuum leak. When you take off and drive normally is it fine? Has it thrown a CEL? 

[claire6]

Thats what I thought but cannot find any sign of it.no cel.drive fine after takeoff but can sort of feel a slight miss when accelerating but almost not noticeable.
At idle goes up and down drastically. .and pops out of muffler like massive back pressure.

[Jimbo]

Did you check your spark plug leads?

[Morgan]

plugs, plug leads cconnections

[claire6]

Its like pulling upto lights snd almost driving itself.going to change plugs see if makes any better

[claire6]

Changed plugs, fuel filter, cleaned iac and throttle body...still same..
Think I can hear a vacuum leak drivers side front of intake mmanifold. There is a vacuum solenoid blue in colour with two ports on it. .no obvious leak but could be it..if not intake off new gaskets.im out of ideas.it just happend all of a sudden.

[claire6]

Purge control valve I think it is...
Woukd this effect idle?

[claire6]

No ideas? ?

[claire6]

Problem solved...MAP sensor the cause.
Can these be cleaned as bit pricey new and 2nd hand.

[claire6]

Bosch -0 261 230 013
Located in smithfield nsw 2164

[Scuba-Roo]

Ive got one from a gen3 ej25