[zillafreak]

OK some info about my car.

2002 GXE Auto
165K on it.
No CEL.
around 132K replaced the head gasket and valve cover gasket.

Issue I am having is when I come to a stop and the engine is idling, after a few seconds, it will start to miss and it wants to stale. RPMs will jump around from around 400ish to 1000. normally it use to idle around 600ish.

once i give it throttle there is no issue.

there is no miss anywhere else.

so far i have only noticed this when i come to a stop and leave it in gear. i have not tried it in park or neutral yet as normally i am too busy driving to work or school.


i am at a lost as to what it could be. i was thinking that maybe coolant was leaking in and it only effects it at idle. my dad was thinking it is bad gas.

anyone have any ideas?

 

[Xmsteel]

Have you tried turning up the idle? If it idles too low sometimes that can happen.

 

[zillafreak]

it just started out of no where. it has all idled just fine before this.

 

[342rwhptitan]

Idle set screw may have worked loose. Happened on a 03 frontier I've got. Worth a try.

Sent from my Droid X2 most likely while driving with a weiner dog in my lap

 

[zillafreak]

could you give me some more details on where this screw is located?

thanks

 

[JudoJohn]

The 1.8 doesn't have an idle adjust screw. the idle is set via computer that the dealer should have.

 

[i68k]

this could be evap related, do you hear any air leaks on the intake, like a hose loose or cracked. clean out your iacv, egr, and pcv, make sure they are functioning properly. this could also be a failing cam/crank sensor, which are common problems.

if the tb isnt cable driven, i believe there's a idle relearn somewhere, thats similar to setting the idle with the computer. other possible failures would include o2, maf, tps sensors.

 

[zillafreak]

here is a video of it running in park

 

[zillafreak]

well i got some spare sensors from the junk yard, need to swap them out tonight.

got a TPS and MAP. also going to take the TB off and clean it out.

hope it fixes the stupid issue.

 

[i68k]

sensors from the junkyard? ::facepalm::

if the tb is not cable driven, i think there's an idle relearn somewhere, you many need it when changing tps.

in the video, whats that noise at 5sec and 17sec, did you have the compressor on? where is that sound coming from? otherwise it doesnt sound normal, hope it not a vacuum hose leaking.

 

[zillafreak]

sensors from the junkyard? ::facepalm::

if the tb is not cable driven, i think there's an idle relearn somewhere, you many need it when changing tps.

in the video, whats that noise at 5sec and 17sec, did you have the compressor on? where is that sound coming from? otherwise it doesnt sound normal, hope it not a vacuum hose leaking.

the car is just idling. nothing is on. it could be a vacuum leaks.

also yes sensors from a wrecked wreck 02 sentra. rather get the sensors for free than pay $300+ for a TPS at the parts store or $100 on ebay.

 

[i68k]

just saying, i know the qr tb was $160 refurb from the dealership, every parts store wanted at least $240. but that was the whole tb, not just the tps. normally i wouldnt recommend used electronic sensors, but if theyre free i guess its better than nothing. also, just so you know, they should all be under $100 at rockauto.com

 

[zillafreak]

well the TPS didn't help. still having the issue, cleaned out the TB as well.

just wondering, wouldn't a bad sensor normally trip a CEL?
also would a dirty injector cause a bad idle?

i just want to make it idle good so i can sell it and start driving my passat.

 

[JudoJohn]

Yes, I would think so. use a stethescope to check for bad injector.

 

[zillafreak]

here are my plugs, put new ones in.

and i will try a stethoscope, my dad has one somewhere.

 

[zillafreak]

well, a buddy came over and brought his obd scanner, and 2 codes came up

p0350
p0444


so tomorrow i am going to look into the EVAP


any tips guys.

 

[i68k]

P0350 - Ignition Coil Primary/Secondary Circuit Malfunction
P0444 - EVAP Canister Purge Volume Control Solenoid Valve Circuit Open

the 444 is saying the purge valve is open. im not sure where this is on 1.8, on my car its up near the intake. so there's no confusion, the purge valve and vent valve are different parts. the vent valve is the one on the evap canister. for the other code, the 350, i have never seen that one, i would follow the diag in the fsm for that one. it most likely will show what wires to test to find the break. hopefully your battery ground was super tight and has good contact to bare metal. sometimes, when the ground cable is bad connection, it will cause the ground point to be coils or ecu, and could cause either to fail.

 

[zillafreak]

well i think the 0350 is because while it was running, we unplug the coils to see if it made a difference. and none of the coils are bad.

my ground on the battery is always tight.

i am leaning toward the 0444 so i am going to check all the EVAP ****. i been looking up the code online to get an idea of what it could be but there is a list of 9 different things to check. i will let you guys know what i find out once i get working on it.


thanks for the help guys

 

[i68k]

from the code, its saying its the purge valve solenoid, so it could be the valve itself. so if thats what the ecu is telling you, i would start there. it's not always an evap code shows a particular part or piece, so i would at least tackle that piece first.

and your right with the coils, if you were unplugging them, that would explain the coil code.

 

[zillafreak]

little update, found out that if i clamp the return line, it will start to run better.

well replaced the fuel return/regulator, it didn't help.

question, is there a fuel filter?


and here is a video of it ****ing up