[matty]

Hey Guys
I made a thread here already outlining my issues. Here is a recap. When I start my car it immediately stalls out. If i give it throttle, I can save it from stalling but the second I let off and the rpms start to come back down, stalls again.

I just removed the iacv, took it apart, cleaned it and ran the firing sequence through it and it works fine. When installed, it was drawing air through the air hose and I could hear it clicking.


My question is, what should I check next? What else would cause my stalling?
Should I check the iacv harness? Perhaps it is not getting the proper voltage? What should I do to check this?

 

[TheBig1]

are you still using the stock or some type of aftermarket ecu?

 

[-GWOOD-]

We first need to know what your setup is so we can take into account some variables. Your car sounds like its doing exactly what mine does except im singled on stock MAF on a cold start that is.

 

[matty]

Stock ecu.

Would a faulty TPS result in these issues?
Ill also try to check for vaccum leaks tomorrow with some carb cleaner and see if I spot anything. The problem started on a smaller scale last summer right after I got the car back from the body shop. Perhaps they disconnected a line or pinched one or cut one by accident.

I also clean out the TB but that did not help.


Last summer, it would do the same thing towards the end of the summer, right before I put it away. However, at that time, I could give it some throttle and it after one blip it would come to idle and be perfectly fine for the rest of the day.

 

[matty]

Im a JDM Auto TT so no MAFS.
Aftermarket BOV, Intake, Exhaust, thats about it.
The BOV i installed a few days ago, long after this problem came about. No changes after the install or with the stocker back on.

 

[-GWOOD-]

hmmmm, from what i found to try and get a remedy to my problem is a TPS out of alignment/Clogged Fuel Filter. Troubleshooting SUCKS. I was gonna say BOV but you shot that idea down.

 

[matty]

One problem with testing for leaks will be the fact that I cant idle haha. I have to keep the motor alive by holding the throttle open a touch with my hand. Will I still hear a change in rpm assuming I hold the throttle perfectly still?

 

[matty]

Fault ecu maybe?
Would this slow crap out over time like in my situation? On the other hand, I have zero other problems. The car has run very well and been problem free for 2 years. Regularily maintained and well taken care of.

 

[matty]

Idle stalls occur when motor is warm or cold so I ca sort of rule out o2 sensor.
When driving, the car has great power still and seems to not miss a beat so I dont think the cat is clogged or back up.

 

[matty]

So yesterday I had this issue resolved. The IACV was working fine after I took it apart, cleaned it and ten reinstalled it. Car held idle perfectly. I came out this morning (12 hours later) and back to the same thing.

What gives?

 

[Dave_Toyota]

Fuel pump ecu... You try to bypass it?

I think you can jump pins FP and +B... Atleast thats what happened to a buddy's Soarer... New FP ECU and he was set.

 

[soarer13oy]

Check for vac leaks around the intake manifold. I once forgot to hook up the map sensor because there was a hose coming from the sensor just not connected and my car wouldnt idle unless i had another vac line unplugged.

 

[matty]

Put a new IACV in and it ran great! Picked up right where it left off. Thanks to everyone who helped out.

 

[Fidel Cashflo]

IACV's can be temperamental. I always had issues with mine, cleaned it a few different times, new gaskets, and all still had issues. It would work fine for a little while then back to shit. Glad you fixed it man.

 

[soarer13oy]

Have any of you guys seafoamed just the intake system?

 

[pday_94TT]

So it was a bad IACV causing the issue? I have the same issue and have pulled it off, cleaned it and tested it using the instructions in the FSM and it seemed OK. I'd like to avoid replacing the part if it's actually OK. Any thoughts?

 

[edenward]

Iacv