*HELP*bouncy dieing idle

[bluemaumau]

wow this is turning into a science/mechanics project now.

ae92 afm 4agze
so far ive replaced/reset/adjusted

ecu
tps
afm

ive done the abv mod removing the blue vsv

next up is to remove the whole intake system and retighten every single connection.

but before i do this is was hoping someone has any smart ideas as to what the problem could be?

in its current state its showing no fault codes
and revs to 1300rpm then drops to 900rpm
back up to 1300rpm - 800rpm
1300rpm-700rpm
1300rpm -600 rpm
1300rpm - 500rpm then stalls.

adjusting the idle screw just changes the highest point(1300rpm currently)

anybody? car should of been on the road 2 months ago.

will

[AceSniper]

idle up solinoid? engines cold so should be idling 1300rpm? solinoid dies... drops... lose wire or bad solinoid???

only a guess but thats were id look

[GTCRSHR]

Vaccume leak some where

[big_boy]

posably hold in windings on the idle up solinoid would explane it solinoid would flick on rev up then hit the hold in windings witch are burnt out the drop back then when back spring open again on the primary/movement windings ect this would cause the solinoid to open then shut over & over again

[bluemaumau]

is that solinoid by the t/b?

it has 3 wires?

ive tried 2 t/b units and made no difference...


so if that was the problem it would have to be the wiring to it

[AceSniper]

tryed it with the 3wire plug not connected?

[lucasthefallen]

....perhaps an air bubble in the cooling system. common issue with 4agze's in aw11's.

[bluemaumau]

wtf i checked my vaccum lines today, too see if they were blocked or something,

went and turned the car on, now the bouncy idles gone and its idling at 2000rpm.

im going to remove the intake tomorrow, but was wondering if anything other than ign timing and air leaks could cause such a high idle?

ive added bluetop cams so im expecting the idle to be a little higher than standard but not 2000rpm

i cant even take it for a drive because the clutch is brand new

[no_8wire]

My cold idle was about 2000rpm..is that cold or hot idle?

[aesc]

Have you checked the idle speed control unit? These can cause idle issues

[bluemaumau]

cold.

where is the idle speed control unit?

[AceSniper]

its the 3wire solinoid.

with no power its half open, ground one side idle will go up to max, goto the other side and idle will drop to min, its just a solinoid with 2hoses to bipass TB

[aesc]

Theres a good write up on the ISC's at www.autoshop101.com under technical articles, no 26 is the one you want

2000rpm when cold is probably a little high, ideally should be 1500-1800. Id get it to normal operating temp see if it drops down. Although youve prob already done that

[bluemaumau]

are you for real, ? i thought a good cold temp was about 1400-1500?

[aesc]

4AGZEs seem to rev highly when cold, mine usued to

As they heat up the revs slowly and gradually drop down and it wont settle into 900-1000 until the thermostat opens

[bluemaumau]

maybe a new thermostat would be good.

mine used to rev to 1500 cold - 900 warm

[bluemaumau]

maybe a new thermostat would be good.

mine used to rev to 1500 cold - 900 warm

[repowered]

my bluetop has high idle at 2000rpm as well- it was incorrect blocking of unused vacum hoses

[no_8wire]

what is your warm idle?

[bluemaumau]

my bluetop has high idle at 2000rpm as well- it was incorrect blocking of unused vacum hoses

care to explain what incorrect blocking is? and what correct blocking is?

what is your warm idle?

2000 cold
1500 warm.

its getting close.