car stalls when headlights/AC turned on, not batt/alt for sure

nash

nash

V6 Moderator
#1
#1
Hey big problem...
my car stalls randomly, and you can apparently cause it to, by turning on the headlights or the AC.

recently i hit a huge pothole that took out the wheel... not sure if related.

anyway, brought the battery and alternator to autozone type store and they are both good.

any ideas?
 
W

Wicked One

Super Moderator / Member Plus / Formally Wicked Xt
Staff member
NYM Staff
#2
#2
What kind of stall?

  1. Does it spitter and sputter than die
  2. junk konk out
  3. do any of the gauge light go on before hand
  4. can you keep it running by feathering the gas
Just some things to consider, this way we can zero in on the issue.
 
nash

nash

V6 Moderator
#3
#3
What kind of stall?

  1. Does it spitter and sputter than die
yes, only after the accessories (headlights, AC, etc) are on, just one is all it takes.... or, randomly sometimes while driving. the sound of the engine gets quieter, u hear some sputters as it begins to stall.

  1. junk konk out ....not so much, it sputters as if it ran out of gas or something or as if it thought it ran out of gas?


  1. do any of the gauge light go on before hand.... during, the blinker seems to be getting stuck on (not even blinking, just straight ON) when the cars 100% off, blinkers & lights off... blinker stays on sometimes. checked connections, bulbs, fuses / relays, taped shit off... took things out, car still stalled.. no errors on error reader.
  2. can you keep it running by feathering the gas.... yes it seems like it thats how i got it home but with the headlights off and stuff... havent tried it with them on and the alternators currently on the floor so, brb...
Just some things to consider, this way we can zero in on the issue.
 
MineralGray02K

MineralGray02K

Administrator
Staff member
#4
#4
I just got back from his house. The car will idle for a while but eventually die within a few minutes. Sometimes it will be driveable as long as it's above 2,000 RPM's, but it wants to and will stall out. We took the battery and alternator to advance auto for a test and both are fine. Everything seems to be plugged in/no loose connections, and there's no visible vac leaks or anything.

If you turn on the lights, radio, or A/C the car will bog down and die out. Could possibly be the ECU? He hit the pothole hard on that side but IDK if that would do anything. The car doesnt seem to be misfiring either. Could also be a shitty tank of gas. He's coming over to borrow my brake line tool and switch out the fuel filter to see if that does anything.

Any ideas?
 
C

Chris2kGT

Well-Known Member
#5
#5
I would check for corroded/damaged wiring, especially to the fuel pump. Also the ECU is in the passenger compartment and they live through crashes so although you cannot rule that out I would say it is likely not he culprit.
 
R

RideThePony2004

Well-Known Member
#8
#8
MineralGray02K said:
I just got back from his house. The car will idle for a while but eventually die within a few minutes. Sometimes it will be driveable as long as it's above 2,000 RPM's, but it wants to and will stall out. We took the battery and alternator to advance auto for a test and both are fine. Everything seems to be plugged in/no loose connections, and there's no visible vac leaks or anything.

If you turn on the lights, radio, or A/C the car will bog down and die out. Could possibly be the ECU? He hit the pothole hard on that side but IDK if that would do anything. The car doesnt seem to be misfiring either. Could also be a shitty tank of gas. He's coming over to borrow my brake line tool and switch out the fuel filter to see if that does anything.

Any ideas?
Click to expand...

let me know how u guys tackled the fuel filter replacement....i got one...i just dont know how to replace it
 
nash

nash

V6 Moderator
#11
#11
gonna try fuel filter & pump first thing tomorrow... exhausted right now, workin on it all day. thanks for the tips and keep um coming if u think of anything else to check. much appreciated guys!
 
W

Wicked One

Super Moderator / Member Plus / Formally Wicked Xt
Staff member
NYM Staff
#12
#12
Being that it only stalls out when the accesories are being used, I would rule out fuel and concentrate on electrical. Did you do a test the voltage at the bat to see what it dropped to. These damn computers need a certain amount of juice to properly work.

Here is a quick way to test.
Some EEC relay diagnostics: here’s a place to look. First check the PCM/CCRM fuse in the underhood fuse box (20 amps). Also check the ignition switch fuses.
At the CCRM (Constant Control Relay Module – the black box mounted on the radiator overflow bracket): With the key turned to run, check Pin 12 and 24 for accessory power. If it’s there, the issue lies past the CCRM. If there’s no power: Check CCRM Pins 8 and 10 for constant 12 volts. Check CCRM Pin 13 for accessory 12 volts. Check CCRM Pin 15 for ground. If 8, 10, 13 and 15 are present (this requires the key to be on), but 12 and 24 are not showing 12 volts, that suggests a bad EEC relay inside the CCRM.

If you want a real easy way, remove all fuses for ac/radio/ etc.... If the problem continues then I would do the above. Keep me posted cause I have a few more ideas but need to know this first.
 
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