Stock GA stalling and dying out csv

[LukeD]

Might anyone have any ideas why my car will start, idle fine for a second, then choke surge and die out? Here is the csv of it idling...

Thanks

[AaronGTR]

Are you using stock injectors? Those injector pulse widths look kinda high for idle if using bigger injectors, and you have some really long ones at the beginning and end. I can't really tell much from that scan though. It's missing a bunch of info. There is nothing in the rpm column, and the car should be getting some kind of crank signal. It wouldn't run otherwise. Might want to check that out. Also the O2 sensor is extremely rich. It just sits at 1107, and it should be reading different numbers. 600-900 mv is usually a rich reading. I've never seen one as high as 1107. Basically it's just a really weird scan... either somethings wrong with the scanner, pcm, or the sensors themselves. Don't know what else to say.

[lvemy3100]

Are you using stock injectors? Those injector pulse widths look kinda high for idle if using bigger injectors, and you have some really long ones at the beginning and end. I can't really tell much from that scan though. It's missing a bunch of info. There is nothing in the rpm column, and the car should be getting some kind of crank signal. It wouldn't run otherwise. Might want to check that out. Also the O2 sensor is extremely rich. It just sits at 1107, and it should be reading different numbers. 600-900 mv is usually a rich reading. I've never seen one as high as 1107. Basically it's just a really weird scan... either somethings wrong with the scanner, pcm, or the sensors themselves. Don't know what else to say.

I agree but I do have something else to comment on...

lots of misfires on cyl 5, 1, and 2 (in order of misfire count)

[LukeD]

Yeah these are stock injectors. This isn't my red car, this is actually caraudiodave's that I bought. It's an SE also. Should all be the same though. Basically it ran fine all the way up from SoCal, and the next day too. Then all of a sudden it starts bogging when driving. Really having a hard time going. I've changed fuel filter, plugs, coil packs and pcm to no avail. The only thing I can think of is clogged injectors. But I dont want to rip this car apart just on a guess.

[harvester45]

I think that the O2 readings in the scan are locked in at 1107 or whatever becaues the sensor isn't warmed up yet. I know my A/F gauge won't read until my car has warmed up the requisite time (I've never scanned until the car is warm, though). What are your idle RPMs set at? Does giving it a little gas right after you start it help? How's your TB and your cables (plug wires and TB cable) look? Does the car ever start and run rough, until it's warmed up, or does it always stall out and die soon after it starts? Just some random thoughts.

[O1GAGT]

Possibly a problem with the IAC?

[BadBlack00Ga]

I've never used powertuner before so I might be pointing out somthing that is normal.
But look at the Total Misfires from row 56 down.
Also the Short Term is really low(or high actually). I've never seen a value like that. Please keep in mind that the extent of my tuning knowledge stops at reading an interceptor...
Maybe an injector is stuck in the open position or somthing?

[Sprucegagt]

Might anyone have any ideas why my car will start, idle fine for a second, then choke surge and die out? Here is the csv of it idling...

Thanks

Was this scan done with the car warmed up or cold?

[LukeD]

Was this scan done with the car warmed up or cold?

I believe the engine was warm. It does it both at cold start and warm. Also it happens when I am coasting too. Sometimes when I press the gas I will get no response for a couple seconds, and then it surges foreward.

I can keep the car alive at start up by tapping the gas lightly and it goes VROOOM! More so than usual if you were to tap the pedal on a normal car lightly.

TB and cables look good, and there appears to be no cracks in any of the air lines.

Today my MAP sensor intermittent code was thrown but then I scanned later and it's gone. Perhaps something to do with that, or my IAC, or clogged injectors. Thats all I can think of.

[Sprucegagt]

Look for a vacuum leak. If none is obvious then scan the car again, except this time include the MAP sensor.

[5-lO]

Check bad fuel pump too... the symptoms you name... my old Bonneville did that (and no you could not hear the fuel pump, atleast in that car) and it had a dying fuel pump.

[caraudiodave]

wow thats crazy stuff. it never did that kinda stuff for me. once in a while, at cold start up it woyuld do that choke thing, but i cleaned the IAC valve and it solved it.

im wondering if this is because of taking the gas down to empty. you mentioned doing that on the drive back up. id check the injectors, maybe clean them. there shouldnt be any vacuum leaks (i always checked for that). the fuel pump is original so it could be that, but it bothers me that i never had the issue at warm start up, and rarely at cold start up.

oh, and it never gave me issues while driving. ill almost guarantee that its because of taking it down to empty, since i never let it get below 1/2 tank.

[LukeD]

Yeah could be, I took it in to a smog shop and we were trying to figure it out. Seems like me and the smog guy are now almost 100% sure it's the fuel pump. Especially because of the symptoms. I ordered one on ebay so hopefully this will get fixed soon.

Also I don't know if it ever happened to you, but the left headlight HID bulb started to come on when the car was off. Just randomly, but it was draining the battery so I had to jump the car when I wanted to start it. I pulled the headlight out and moved the wires a bit and it went off. I then reenforced it with some electrical tape. It still did it again later though. And this time I noticed, I could force the one that came on by itself when the car was off, to turn off by turning the headlight switch on then off. It would turn it off temporarily, but it would come back on later, and once it flikered on and off rapidly (not good for HIDs). I managed to stop it temporarly again, but later on it must have done it when I wasnt around cause now it's burned out.

[caraudiodave]

its not burned out. the relay is bad i think. that did happened to me once, i replaced the relay. it happened after washing the car. when you replace the relay, wrap it up with electrical tape, i forgot to do that this time.

[LukeD]

Oh well that's good it's not burnt. What type of relay am I looking for? Or should I just pull it out and take it to radio shack?

[caraudiodave]

well, if you look on the other side youll see a bosche. i didnt have a bosche, but i had one laying aroudn that worked so i used it. id take it out and get one that matches. the prongs need to fit right and the specs need to match. try to get the bosche one if possible. once you get it, use electrical tape to seal it up. not sure why its giving such problems.