2G Idle problem & smoke

[vl4bad]

HI,

I have a 95 Talon TSi AWD, the car is almost complete and almost track ready,
I just bought it and the guy that owned it didn't tell me much about it, but from what i have experienced so far is a good car that pulls real hard, and sounds beautiful...now to the point,
Since I don't have it insured yet i don't drive it, but I do start er' up everyday to let her idle,
the engine was rebuilt and has new everything and upgraded stuff toot will idle after a cold start kind of high around 2,000rpm and then will settle to 1200 but then it starts to go from 750-1200 and the AFR gauge will show up bouncing around and then staying around 12.3-12.7 around that range. then when i rev in quick short bursts the car will throw out some white smoke and then smell kind of sweet but after a few seconds it goes away. my Gas gauge doesn't work and my oil gauge doesn't work either. can someone tell me what my problem is i have aem EMS but i don't have a pc neither am i experienced in tuning. please help me i just want my car to be alright. thanks

-edit: also when i put my headlights on bright the idle messes up also, things i think of that are messing it up are: needs a new battery, head gasket needs to be replaced, antifreeze leak? , car needs the idle to be tuned, TPS is messed up, or maybe i need to give the car an oil change and a full tank of gas. idk.

-dave

 

[97gsxIA]

For the electrical stuff, just get yourself an ohmometer and test the resistance on your battery, alternator etc. Obviously youre putting load on the engine that the battery/alternator that you have can't handle. which means one of them is going.

As for the smoke and sweet smell.. Well, it could be a few things, but the obvious one would be the headgasket has blown out between the coolant passage and a cylinder. do a Leakdown Test to rule the headgasket out. If the smoke is white and smells sweet: well it kinda goes like that old saying: If it walks like a duck and quacks like a duck....

Your gas gauge probably isnt working becuas eof the float in the tank. Heres a link to a thread with a schematic of where you can look for the float:
http://www.dsmtuners.com/forums/maintenance-repairs/428359-cant-find-float-95-gst-gas-tank.html

Stock oil press gauges are crap anyway.. get an aftermarket mechanical gauge, and once you check it with the mech gauge, you can switch over to an electrical aftermarket gauge (i just dont trust the electrical ones for a good base reading)

Your AFR's being rich and your high idle/surge is most likely contributed by a boost/vacuum leak or pre-turbo exhaust leak(Rich AFR). get a Boost leak test done and make sure everything is sealed up, then adjust your TPS and BISS (BISS requires grounding the diagnostic terminal - not sure if EMS can do this like DSMlink can, but you can also ground it the old fashion way.) etc. etc. to smooth your idle out.

I don't want to be a debbie downer, but from the sound of it, she's not close being track ready at all. Maintenance first.. TUNE later. Unless you want to say goodbye to that motor entirely

Might as well check your turbo for shaft play as well

MAINTENANCE! MAINTENANCE! MAINTENANCE! MAINTENANCE!

just for reference from someone who is maticulous withi his DSM, I change all my fluids if I don't remember the last time i changed them.

Also, here is a link to a maintenance reference guide:

DSM 4G63 Maintenance Guide - DSMtuners

Happy hunting sir! and Good luck !

 

[vl4bad]

Alright sounds like I have some work to do now. Thanks for the input and possible problems. I will start doing this asap and I will update this when I can.

edit: also would you think its a good idea to let her idle once a day since i don't drive er' yet?

 

[97gsxIA]

It's always good to start the car every once in a while if its not a DD. I try to keep my idle times low, as with any car I drive. If you let it sit longer than a few weeks, I would say prime the oil pump by hand cranking it for a couple minutes (no plugs in of course so you don't fight compression) So you don't start a dry motor. Other than that, I'd say youre good. When you let her idle, just let it get up to operating temp then shut it of.. anything after that is pointless unless you want to drive it.

 

[vl4bad]

It's always good to start the car every once in a while if its not a DD. I try to keep my idle times low, as with any car I drive. If you let it sit longer than a few weeks, I would say prime the oil pump by hand cranking it for a couple minutes (no plugs in of course so you don't fight compression) So you don't start a dry motor. Other than that, I'd say youre good. When you let her idle, just let it get up to operating temp then shut it of.. anything after that is pointless unless you want to drive it.

Yeah well I usually start er' up once a day, if not ever other day at least. It's tempting to drive but since I don't have a job atm I haven't got insurance, and there is no point of risking that even if its around the block.

 

[vl4bad]

Any suggestions on a new head gasket?
I want to purchase one online today, just something temporary but not shit quality, at least until I save up for a good quality made gasket.

 

[97gsxIA]

Have you performed your leakdown test? What were the results? and if you are maintaing a stock block you can use the OEM felt head gasket, but I would recommend the metal one...:

STM: OEM MITSUBISHI METAL HEAD GASKET | 4G63 90-99 DSM

Don't assume its the head gasket.. did you check for shaft play on the turbo?

I've told many people to do leakdown tests and they never do them, they just assume the worst.. so please, perform the test before spending shit tons of money on head gaskets and other such parts..

 

[vl4bad]

Have you performed your leakdown test? What were the results? and if you are maintaing a stock block you can use the OEM felt head gasket, but I would recommend the metal one...:

STM: OEM MITSUBISHI METAL HEAD GASKET | 4G63 90-99 DSM

Don't assume its the head gasket.. did you check for shaft play on the turbo?

I've told many people to do leakdown tests and they never do them, they just assume the worst.. so please, perform the test before spending shit tons of money on head gaskets and other such parts..

Ok, well No I haven't done the leak down test, only because I don't know how I'm definitely willing to do it but have no knowledge of it...also it isn't my head gasket the car is actually running much better I tighter up the Fuel regulator so now I'm getting a reading of 45psi maybe 46psi but since I did that my idle is normal!!!

BUT! I still have a slow leak not sure where its from, also I need a few things to know, HOW DO I EMPTY MY GREDDY OIL CATCH CAN, its so full the lithe filter on it is smoking from burnt oil....and the car is not throwing out white smoke anymore, i took her for a test drive on my block today and she pulled hard sounded good and was not giving me any problems or showing any major leaks, only after I parked her in the driveway I seen the usual spot on the floor from the leak.. Im going to check for shaft play probably tomorrow... now tell me HOW DO I DO A LEAK TEST?!

 

[vl4bad]

bumpity,

 

[007jimmy]

Search boost leak test and leakdown test. I would give you the links but it's a little difficult on my phone

 

[vl4bad]

Search boost leak test and leakdown test. I would give you the links but it's a little difficult on my phone

alright thanks.

 

[WES_393]

If you have a leak you can't track down, go to your local parts store and ask for UV coolant dye kit. It should contain a small bottle of dye and a UV flashlight. Pour it into the coolant, start the engine with the E-brake on (and possibly a block under a tire), and immediately start shining your fancy light all over the engine bay. Look from the top, bottom, sides, etc. It's best to do this at dusk or even at night so you can see the dye glow. That should give you a very good idea of where the leak is coming from. Also read the directions on the dye bottle. Some recommend flushing the cooling system after use while others can be left in the system with no issues.

As for emptying the catch can, is there not a drain on the bottom? If not, just take it out of the engine bay, remove the filter and vacuum lines, and dump it out through any of the holes. Either that or pop off the plastic sight glass and let it drain from there.

 

[vl4bad]

The catch can problem has been resolved, and emptied, it was just annoying honestly, i didn't want to mess anything up which is why i was so precautions about it. but thanks anyway.

That dye really sounds like a good idea, ill check it out maybe even see how it goes, ill update soon.

Thanks again for all the help!

 

[JamesH3]

Leak down test if what I would do first

 

[Stmguy42]

Sounds like the head gasket is not making the proper seal. As for the idle issues i would check the tps sensor is set correct and check your alternator..

 

[vl4bad]

Sounds like the head gasket is not making the proper seal. As for the idle issues i would check the tps sensor is set correct and check your alternator..

I'm almost positive its the head gasket. found some green liquid under my car so thats ANTIFREEZE, which can leak into the engine and get combusted out through the exhaust then causing that smoke problem..

And i would love to check the Tps sensor but idk where its at or what it even looks like...Ive done the research and found this http://www.dsmtuners.com/forums/newbie-forum/324431-how-adjust-throttle-position-sensor-tps.html but i don't know what tools i need for the readings/adjusting,etc.. if someone could post exactly what to do i would be so happy.

 

[vl4bad]

bump