weird idling problems
08-24-13, 04:15 PM
#1
weird idling problems
Hey..
I'm having troubles with an idling problem that when it gets hot outside.
It will start but slowly stall out, like its not getting gas.
I cleaned out the iacv and it didn't fix it,
the only thing that works is if I leave the battery unplugged overnight then plug it back in and it will run just fine all day even if its hot outside
Does that mean my ECU is giving out?
I'm going to take video of it today, maybe that will help.
Thanks for the help
I'm having troubles with an idling problem that when it gets hot outside.
It will start but slowly stall out, like its not getting gas.
I cleaned out the iacv and it didn't fix it,
the only thing that works is if I leave the battery unplugged overnight then plug it back in and it will run just fine all day even if its hot outside
Does that mean my ECU is giving out?
I'm going to take video of it today, maybe that will help.
Thanks for the help
08-24-13, 04:31 PM
#3
yeah that all tested fine, i just replaced the battery, this only happens if i leave the battery plugged in for the day and it will start stalling and the exhaust kinda smells
after a overnight unplugged it will not smell and run good
after a overnight unplugged it will not smell and run good
08-24-13, 09:27 PM
#7
no cel light on
yesterday in the hot sun i start it and you can rev it up but it wont hold for long till it bogs down,
when you turn on the ac it will stall or if you turn on the steering wheel the needle will move up and down a lot
now if its cooler out like at night or if the engine is nice and cool, it will start right up fine for a while.
the weird thing about it is ,I disconnected the battery over night and waited till its super hot out to reconnect it, and it was running fine all day today
Ill do more testing tomorrow for vac leaking
no matter what i do it will stall even flooring the gas pedal
Its hard to pin point the issue
yesterday in the hot sun i start it and you can rev it up but it wont hold for long till it bogs down,
when you turn on the ac it will stall or if you turn on the steering wheel the needle will move up and down a lot
now if its cooler out like at night or if the engine is nice and cool, it will start right up fine for a while.
the weird thing about it is ,I disconnected the battery over night and waited till its super hot out to reconnect it, and it was running fine all day today
Ill do more testing tomorrow for vac leaking
no matter what i do it will stall even flooring the gas pedal
Its hard to pin point the issue
Last edited by mikef; 08-24-13 at 09:36 PM.
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08-25-13, 07:17 PM
#8
My car does this after I've been driving for a while, and I shut it off. Once I start it again it won't idle and it stalls out. I have to bring the revs up to about 1k and then it'll stay running. What's the deal?
08-25-13, 08:08 PM
#10
well I noticed on mine that my idle is very low on initial start up, then it jumps up just a little bit to around 1k, and then drops back down for a split second nearly stalling out, and then comes back. My car however is running on its stock battery . . . from 1992 and a dirty alternator also from 1992. When its warmed up the car is idling around 600 RPM
08-25-13, 09:10 PM
#12
Pretty good plan. I'm going to swap my battery anyway. It was supposed to be recycled back in 2009, and was venting acid at one point.
08-26-13, 07:50 AM
#13
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no cel light on
yesterday in the hot sun i start it and you can rev it up but it wont hold for long till it bogs down,
when you turn on the ac it will stall or if you turn on the steering wheel the needle will move up and down a lot
now if its cooler out like at night or if the engine is nice and cool, it will start right up fine for a while.
the weird thing about it is ,I disconnected the battery over night and waited till its super hot out to reconnect it, and it was running fine all day today
Ill do more testing tomorrow for vac leaking
no matter what i do it will stall even flooring the gas pedal
Its hard to pin point the issue
yesterday in the hot sun i start it and you can rev it up but it wont hold for long till it bogs down,
when you turn on the ac it will stall or if you turn on the steering wheel the needle will move up and down a lot
now if its cooler out like at night or if the engine is nice and cool, it will start right up fine for a while.
the weird thing about it is ,I disconnected the battery over night and waited till its super hot out to reconnect it, and it was running fine all day today
Ill do more testing tomorrow for vac leaking
no matter what i do it will stall even flooring the gas pedal
Its hard to pin point the issue
went thru same probs u r experiencing especially very poor performance when car was in
hot sun. did almost all classic recommendations...nothing helped. finally rebuilt ecu module
with 10 new caps as recommended by cowboy/Yamme.
the follwwing issues cleared up:
1) no more erratic rough idling.
2) no more stalling when trying to rev motor above 3000 rpm
3) no more dying at random.
4) no more transmission shift shudders.
5) speedometer finally started working properly after yr off whacko readouts.
6) loss of power and smooth acceleration back to normal.
not saying your ecu is the culprit but i'm guessing it is since you seem to have probs when
car is hot...caps breakdown in heat. i also live in florida.
good luck with the ecu you picked up.
08-26-13, 11:33 AM
#15
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leaking caps. even tho you may not see any visible (usual orange deposit at base of cap) it
doesn't mean that bad caps don't exist.
how old is your car??