James
(Does lots of head)
08/11/12 06:54 PM
Calling all cars...

Yes, this is about idle problems, but it's past the basics now...

Well I've reached the end of my line on stopping the galant from dying at idle when it reaches temp.

I have no vac/boost leaks that I can see or hear. (using soapy water ect)

I rebuilt the TB.

3in exhaust no cat magnaflow muffler

Boost gauge, running boost off wastegate pressure (10lbs)

I've essentially replaced everything on the intake side, from the Jpipe up to the intake Mani gasket.

ISC/TPS are In spec, no cels

The car runs fine at cool temps, I assume the ISC is doing its job correctly. When the car reaches temp, or aprox 8 miles worth of driving, the idle will begin to falter when I push in the clutch, say to put it in N for a stoplight.

If I I turn the car off, say to go into a store, when I come out she runs fine, till the temp is back up and the same issue repeats itself. Here are some videos to depict what's happening.

I'm I'm need of obscure help, because the basic vac leak/FIAV/ISC answers aren't going to cut it anymore.

First video here is showing the fresh cool motor idle, with a few second of exhaust.

click

Second video is me at a stoplight/sign with my lame issue, I blip the gas up to 1500 for a second, and the end I'm trying to hold it around 8-9

click

Third video is me coasting down a side street in neutral, showing the same. The. A small third gear pull

click

I swear this has to be something temperature related. Maybe computer related? Could it be the ECU? I don't have another one to swap out and see.

She was playing nice when I took the videos and didn't die at all, just faltered. Usually she will bounce down once or twice then die on the third try. It's quite embarrassing really.]


JamesFoster
(Infamous BMX Master)
08/11/12 08:30 PM
Re: Calling all cars...

Is your BOV recirculated?

James
(Does lots of head)
08/11/12 11:46 PM
Re: Calling all cars...

Yes

Noobsauce
(Member)
08/11/12 11:52 PM
Re: Calling all cars...

Do you have link? If so post a log of the intake and coolant temps.

turbowop
(Hard Snarker)
08/11/12 11:53 PM
Re: Calling all cars...

Try a different ECU just in case. It could be the ISC drivers.

James
(Does lots of head)
08/12/12 12:17 AM
Re: Calling all cars...

I don't have anything to log with :/ I bought a palm logger from a member here but it didn't work when I plugged it in.

I'm also at a Loss as to how to fix that. But that's another day.

I don't have a different ECU, and the only local DSMer uses an AEM brain.

If someone has a ECU they would like to send me to test that would be great. Obviously I'll play shipping both ways.


Noobsauce
(Member)
08/12/12 02:17 AM
Re: Calling all cars...

Have you tested the coolant temp sender on the t stat housing?

DynastyLCD
(Dissapointing Member)
08/12/12 03:39 AM
Re: Calling all cars...

ive got an idea for you. let the car get fully up to temp, turn on all the lights and highbeams, fan motor for your heat/AC, radio, etc. with it warmed up, adjust that BISS screw til you can idle at 850 - 1000.

i've seen alot of people set it improperly, where they will set it to idle low (750 - 850) with no lights or any electrical load on. but then as soon as you hit the lights and the radio, etc, wants to die cause the idle drops off too low.


transparentdsm
(I have to say something dumb Member)
08/12/12 06:01 AM
Re: Calling all cars...

^ yup... this or the ecu idea would be the best guesses.

James
(Does lots of head)
08/12/12 08:02 AM
Re: Calling all cars...

It's not the biss I know that, the idle is properly set. I'll check the coolant sensor, I assume I can find the info on vfaq.

LIV4PSI
(dyslexic 1051 )
08/12/12 10:23 AM
Re: Calling all cars...

I would at least check the caps on your ECU. If it hasn't been rebuilt it, I'm sure it needs to be soon.

James
(Does lots of head)
08/12/12 10:42 AM
Re: Calling all cars...

The ECU is clean. I posted a thread about my ECU about a month ago. Found out its a clean 92 eagle talon 5 speed non EPROM ECU.

Apparently my multi isn't in my car, so I'll have to wait till tomorrow after work to check the coolant sensor.


ktmrider
(Cool Guy Crowd)
08/12/12 11:13 AM
Re: Calling all cars...

James I realize you bought a logger however you NEED to get some type of real-time measurement device. You'll continue to go round-round on the site til then.

Did you ever bypass the FIAV ( just FIAV and not the ISC )? Can't see that in any of your posts. Also the suggestion about another ECU is sound too, so many ECU ISC drivers get damaged by even a slightly bad ISC. Logger will also tell you what your ISC duty cycle is at, another great way to tell the health of your ECU.


James
(Does lots of head)
08/12/12 11:40 AM
Re: Calling all cars...

Trust me I want to be logging, I didn't want to throw away $80 to get a logging setup that didn't work.

But the palm won't connect with my car. I think it has something to do with the car being a galant GSX, maybe the wiring in the diagnostics port is slightly different.

The TB is blocked off, FIAV only, ISC still functional.

If someone has a extra ECU they don't need then send it to me to test with! I'll pay shipping
Both ways. But sadly port richey Florida is the home of non turbo old people cars. I don't have 10 Dsm buddies I can call up to swap ecus with.


James
(Does lots of head)
08/13/12 01:53 PM
Re: Calling all cars...

I'll be checking the coolant today after work. And I'm picking up a timing light to check my base timing, since I never did it when I bought the car.

James
(Does lots of head)
08/13/12 04:28 PM
Re: Calling all cars...

The voltages from the coolant plug ad sensor are so far off that I think I'm doing it wrong.

I'm not seeing anything on the sensor side with ohms, and I'm seeing 50v +\- on the plug side.


James
(Does lots of head)
08/13/12 05:04 PM
Re: Calling all cars...

eh the voltmeter was on millivolts or something i guess when i saw the 50. i couldnt get any reading on the correct setting. my stepdad lost the set of grounding wires i had made up so i cant ground out the timing plug to check my base timing.

all in all im done for the time being. its a thousand degrees outand im tired of something so simple like a bad idle getting the better of me when ive been around this platform for so long. ill just learn how to work the brake and the gas at the same time when im coming to a stop to keep the car from dying.


James
(Does lots of head)
08/17/12 12:39 PM
Re: Calling all cars...

Got the coolant temp sensor replaced today (thanks Jnr). But it didn't fix anything, the sensor was bad though so I'm sure I'll probably get some better gas mileage!

Only thing left is ECU I think...


doelcow
(Junior Member)
08/17/12 08:09 PM
Re: Calling all cars...

Make sure you don't have any air pockets in your coolant. I know it sounds crazy but... it can mess with your idle.

James
(Does lots of head)
08/17/12 10:47 PM
Re: Calling all cars...

I'm pretty sure I got all the air out, though again I don't think that ls something that would only cause this to happen when hot.

I'm driving down to ft Myers for the weekend and I'll be meeting a DSM buddy down there. He has a extra ECU and has link so we will not only be trying a good ECU, but getting some logging done also! (assuming it connects with the car, unlike mine).


theevozero
(Member +)
08/18/12 03:09 PM
Re: Calling all cars...

Crankwalk. All the 6 bolts I've seen that die when you push the clutch in, had crankwalk. The failed thrust bearing put a huge load on the engine when you press 2100-2600 lbs of pressure on it.

doelcow
(Junior Member)
08/18/12 08:32 PM
Re: Calling all cars...

Why would it be fine cold then?

James
(Does lots of head)
08/18/12 11:27 PM
Re: Calling all cars...

Yes.... It's crank walk.... Just like the guy who blew his motor because he didn't have a oil filter... That was crank walk also. Trying a new ECU tomorrow. I'll update then!

theevozero
(Member +)
08/23/12 09:19 AM
Re: Calling all cars...

Alright man, it was just something to keep in mind. If you don't like the answers your gonna get, don't ask questions. I've been there, done that a thousand times and have verifed my findings. I also wouldn't post in any help section till you have a complete diagnosis. I bet if you know what you were doing, you wouldn't post until you had a log. Raw data speaks a thousand words. Good luck to you though.



dammitjim
(Member +)
08/23/12 10:21 AM
Re: Calling all cars...

Do a compression test and post the results

James
(Does lots of head)
08/23/12 11:16 AM
Re: Calling all cars...

The guy flake on me with the ECU. Said he couldn't find it when I got to ft Myers.

And as I said before I REALLY WISH I COULD LOG! I PURCHASED A LOGGING SET UP!

I cant help that the logger mysteriously won't connect to my diagnostics port.

My stepdad lost his compression tester, which means its just burried in the garage. I should be able to pick one up this weekend.


theevozero
(Member +)
08/23/12 01:41 PM
Re: Calling all cars...

TMO is a capable logging program and its free. Also about $5 worth of stuff(a diode, a resistor, some pins and a connector) at Fry's or Radio Shack will make a cable for you. The plans are on the web. Oh, and a laptop. The fact that your car use to be non turbo shouldn't matter. I've connected with non-turbo cars before. The only difference is the data that is displayed. Assuming you have a turbo engine harness, you should be completely fine.

James
(Does lots of head)
08/23/12 03:19 PM
Re: Calling all cars...

I have a logger. And cable. And software. I get a serial com error when I plug it in. I've had quite a few people look at it for me and it just won't connect. It works in other peoples cars just fine.


Update: it's seemingly fixed. 2 days with no issues so I'm crossing my fingers.

The timing was way off. I wish I still had the previous owners number so I could verbally throat punch him.


theevozero
(Member +)
08/25/12 02:17 PM
Re: Calling all cars...

Check and make sure your data link connector pins havent been pushed in(on the car).


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