Rb20 Sluggish/stalling Occasionally

[sammus]

Hello all,

After driving hard at DECA the other day, the car started acting up just as i got to my street (after 2 hours driving home)

-Going up the revs it would hesitate (blow off valve would sound) then it would go back on boost and climb again. My thoughts were piping.

Then it was all fine until the next day.

-Stalled on me a few times.

-On idle revs would climb to about 2k then drop back to normal then climb again continuously. My thoughts were AFM sending faulty signal to ecu.\

-Also slightly sluggish when cruising

Sprayed AFM with carby cleaner but still problems > maybe on the way out. Have checked cooler piping also... maybe not checked well enough...

Are there any other components that would cause problems like these that i should pay some attention to before buying an AFM?

Thanks

Sam

[raZ1911]

ECU, Fuel pump?

[Pun4N1]

is it blowing loads of smoke?

un plug the O2 sensor and see if that makes a difference.

also unplug your AFM and see if that makes a difference.

there is an ignition module on the top at back of the cam cover, the big square-ish flat thing with all the wires. that controls the coil packs this could be the issue. if your spark is breaking down then your bov will acctuate.

very VERY slim chance but i could be your throttle position switch too, had a VLT that was cutting out on full throttle coz the TPS was wired in backwards!!! some plonker had put an XF throttle body on there and forgotten to mod the TPS to suit!!!!

also check your spark plugs dude, it does sound spark related to me.

Edited April 21, 2008 by Pun4N1

[sammus]

thanks for your replies

ecu is remapped, fuel pump is quite a new bosche.

no smoke. o2 sensor unplugged doesn't seem to make a diff

afm unplugged - revs at 2k, which is similar to what it was doing the other day reving up to 2k then dropping - so i'm thinking dodgey connection.

opened up the wires that go to plug:

there's an unused bare wire wrapped around 2 AFM wires, and then that's all covered in heat shrink. goes all the way down like that.

connection seems okay though

[sonoramicommando]

this sounds too basic, but are your vacuum lines all hooked up?

i got that when i forgot to hook up some vacuum lines.

cheers

[sammus]

this sounds too basic, but are your vacuum lines all hooked up?

i got that when i forgot to hook up some vacuum lines.

cheers

i looked at the lines but couldn't find anything that had popped off... but there's so many so i will look again with engine running

this flowchart would be useful if i learn to use the multimeter properly:

and sorry ash just realised we have a general maintenance section where this should be

[allthewaytotheskyline]

check your ignitor pack ad see if any plugs are loose...and that its earthed out....and tightneed down to the head...

check dat all coil packs are plugged in properly...

[Hunting Lions]

afm, check intercooler pipeing. it sounds like a leak they are a bastard to find but i would check all those avenues first.

if u said u were driving it hard only a few days prior and all of a sudden u have idle issues that is where my money would be on.

Edited May 26, 2008 by Hunting Lions