After Starting Issues!!!

[noel]

little back ground on my car
88turbo 5sp with about 94kmiles boosting 14psi exhaust,Intake,TurboXS BOV

______________PROBLEM________________

when i start the car the rpm goes up and down between 300-700 like it wants to die but doesnt
A few seconds of this it shoots up to 2,000RPM and the oil pressure goes up to alil under 40psi I dunno why it acts like it wants to die for a few seconds then she fine after the oil pressure goes up
____________________________________________________________

It warms up just fine and she drives with any problems
the car has OIL!! there's no coolant mixture either!! NO SMOKE

i live in miami it's not really hot or cold right now.. So im using 10w30 oil i have no check engine light and no oil leaks the dip stick says i have oil [im thinking my oil pump is going bad]..... or is it something else???

 

[grimreaper]

codes?

 

[noel]

Nope NOthing....:-(

 

[Rennat]

the cooler valve opens at 40psi on the filter head... so thats probably why it goes " a lil under"

 

[noel]

okay im slow explain more in detail....i only see 40psi or above when im driving and the car isn't fully warmed up or when i race alot ......

 

[noel]

the Problem is when the car is started it stumbles/sputters under 1,000rpm for like 5-10 seconds and stop when the oil pressure rises

 

[noel]

did it again this morning dammit! anybody have an idea???

 

[dumbo]

ISC sticking/dirty?? Can't hurt to pop it off and clean it, need a gasket though.

I would almost guarantee oil has nothing to do with this.

 

[noel]

where is the isc at again??

 

[dumbo]

its the one on the intake manifold that has a hose going to the air filter/pre turbo. this is only a educated guess, i'm sure it could be many other things. good luck.

 

[noel]

your guess is just as good as mine ..when i remove it does it need a gasket or do i have to adjust it with something??? i wanna make sure before i pull it out

 

[dumbo]

ISC sticking/dirty?? Can't hurt to pop it off and clean it, need a gasket though.

I would almost guarantee oil has nothing to do with this.

 

[noel]

LMAo i need new glasses ill get right on it and post the update

 

[noel]

well problem solved i hope lol at least that stupid sputtering stuff stopped....i clean that dam ISC it was all black and nasty Brake parts cleaner and some rags got everything nice and shine ....ONe question it has a coolant hose attached to it where does the other end go to ???

i didn't turn the car for 2 days and when i cleaned everything i crossed my fingers and turn the key In 2 seconds it turned on before, it took 3 times not anymore lol hopefully THAnxz bro great help!!

 

[dumbo]

Right on, I hope it lasts sorry its been awhile i forget where the coolant line goes.

 

[noel]

lol ummm... the problem is still there i turn it on this morning and it took a while to turn on ... im starting to thinki need spark plugs and wires...maybe i dunno what else it can be i have a good battery and all the wires and clean and tight no vac. leaks ...

i would love to know where that hose goes to do u know what it's called ? lol

 

[dumbo]

sorry i cant remember and i cant find it. its hard to say over the internet, i hope the gasket didn't cost much..

 

[jdub]

Look at this for the coolant hose routing:
http://www.cygnusx1.net/supra/Library/TSRM/MK3/manual.aspx?Section=CO&P=2

Hose starts at the hard line that goes around the block, drivers side rear of the motor--->TB--->ISCV--->fitting on the bottom if the lower intake manifold, under the #2 runner.

You likely have a vac leak...check this:
Block off the hose that runs from the accordion hose to the ISCV so no air can pass while the car is running. If it dies, you don't have a leak...if it keeps running, you do

 

[grimreaper]

^ and the PCV lines!

 

[jdub]

^^^ Correct...thanks! That can just be blocked off at the TB before you start the engine.