Idle Issue

[R338OY]

While idling the engine 'blips', just a lumpy idle really. I did a bit of research and found it could be a problem with the RB25 throttle position sensor. Is there a connection?

I cleaned my AAC valve and AFM but didn't fix anything.

Any advice?

[R338OY]

bump

[R338OY]

What about an air leak?

[Granthem]

good old nissans...never idle properly.

could be coils, plugs, tps.

[R338OY]

  Granthem said:

good old nissans...never idle properly.

could be coils, plugs, tps.

I've done plugs recently. So that leaves coils and TPS.

I read the "tape your coils" thread, so i'll give that a try.

What are the possibilities it's the TPS?

[siddr20]

I would have thought cleaning the AAC would solve it..

Strange!!

[battery]

yeh i doubt you will get it perfect maybe try resetting the ECU...

[R338OY]

Yeh i'll reset the ECU, though i doubt it'll fix it.

My rpm's aren't affected but i can feel the engine vibrate, even with music pumping (no sub ).

I'm guessing there's some magical thing i've missed that needs cleaning/fixing

[cpt_impossible]

  R338OY said:

Yeh i'll reset the ECU, though i doubt it'll fix it.

My rpm's aren't affected but i can feel the engine vibrate, even with music pumping (no sub ).

I'm guessing there's some magical thing i've missed that needs cleaning/fixing

Did you ever get this solved?

[delljit]

this is what mine does, is it sorta the same thing? i also cleaned aac valve, regapped plugs and cleaned afm but nothing helped. My next try will involve dumping it at a workshop and praying they can fix it!

http://youtube.com/watch?v=02Cyv2CWqDU

[series2r33]

My car was idleing like that just after i fitted the new turbo that had a .7 comp housing and still managed to have the stock afm attached thanks to some attachments. 2 days later i fitted the Z32 afm and a retune and now it idles fine...

Maybe its the air flow meter if u havent touched anything recently?!

[bumble_bee]

yeah, mines doing the same thing..and i thinks it getting worst!!!

(MODS)

i drive a r33 s2 skyline..

i got a hks exhaust, 3A Racing POD, FMIC,greddy ATMO bov, splitfire coilpacks, re-gapped ngk iridiums plugs to 0.8,

boosted up too..running on 12psi, and got an ApEXI NEO (and had tuned twice)

(ISSUES + CURRENT PROBLEM)

and now im getting really bad flat spots, bad idle etc.. lol and hunting issues again..which wer all gone..

but now everything is back at once..lol

(WHAT I"VE TRIED)

plus ive tried cleaning throttle body, intake manifold with forton carby cleaner(the best stuff u can get)

cleaned the IACV(the 3 bolts that are on the end of the manifold) took it off and gave it a good clean etc..

but yeah evan sprayed vac line that gone down to the IACV.. tryed cleaning afm with electrical contact cleaner too..

(MAIN PROBLEM)

idle issues wen starting the car are now gone..but yeah

hunting issues wen clutch in/etc..

revs drop down to like just under 500rpms...and then from there it will start hunting..

only sometimes it will do this...usually it will go back up to 1100rpms..but other time it will hunt..

it like it trying to prevent itself from stalling..???

hunting pretty bad...

(APEXI NEO - DEC AIR SETTING ISSUE)

i've looked on my setting on the apexi neo..

the DEC AIR SETTING isnt turned on, i believe...it say's off,

and then i cant turn it on,(its not anon/off type select...

it goes and changes to %..and starts from 0%..s wer do i put it too???

so yeah, a bit confused....

so anybody now u to use this setting??

and do u reckon a z32 afm and new fuel pump + a re-tune will help???

[mid life crisis]

i reckon get rid of ya atmo bov and it prob will solve ya problem

[bumble_bee]

  mid life crisis said:

i reckon get rid of ya atmo bov and it prob will solve ya problem

the bov is fine..and ive had it for months..no problems..the second time i got my car tune..i fixed the bov

problem...so i dont think its related..

[r33cruiser]

have u remounted the afm recently?

or still in stock position?

Edited April 6, 2008 by r33cruiser

[bumble_bee]

  r33cruiser said:

have u remounted the afm recently?

or still in stock position?

same position, havent touched the afm?

any more ideas?

plugs or new afm???

[bumble_bee]

k, put new plugs in and clean the afm again wit electrical contact cleaner and made a difference:)

still reckon z32 afm will help alot

anyone else wit this problem?

as i mentioned above?????

[paulr33]

there are a few known causes of idling style issues. dirty contacts (AFM or TPS), worn out valves (AAC valve), and other wear style issues (wiring, coil packs etc).

these would typically result in unstable idle, fluctuating idle, or blipping style idling - the r33 service manual would list several fixes and corrective measures for this, you should download it and have a read

the engine rpm dropping to 500rpm (almost stalling) on clutch in is usually associated with an atmo bov

its been covered to death over a 100 times, its always usually the atmo bov, it dumps air that the AFM has already measured

so the mixture is out of scale, as the air is missing so the engine overstalls and rpm's plummet

[bumble_bee]

would a atmo-plump-back type bov fix this problem???

lik i have the choose to make ot plumb-back and atmo..

coz on my 33 now ive got a greddy type rs atmo bov..

which has an a key on the top to adjust the spring inside...

mit adjust that abit harder and c how i go...

[NYTSKY]

Had an issue with mine.Turned out to be a worn ACC.Replaced it and problem went away.