Author Topic: stalling at stops and idle  (Read 3379 times)

Offline frotosride

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Re: stalling at stops and idle
« Reply #15 on: October 26, 2015, 08:38:52 PM »
http://forum.73-87chevytrucks.com/smforum/index.php?topic=21039.0

Got it!!! Follow this. The first time I did it I didn't have a tach because it wasn't a factory option for my truck but so I did it by sound. I did get a tach soon after and it was spot on. The biggest part is actually the load at idel. I replaced the same things except instead of the intake !ainfold ( no vaccum leaks) I replaced my alternator because of a fluke and thinking it was a voltage drop causing the stall. This will like fix the issue. I'd be blown away if it doesn't. You will need a small torques bit to do the adjust!entire and a drill. You can get the idle screw plug out with a punch to off center it. Maybe even a screen and hammer.





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Offline 12gaige

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Re: stalling at stops and idle
« Reply #16 on: October 27, 2015, 05:56:40 AM »
Sorry for the wording. The truck will usually not stall the first cold start of the day for the firt minute. after i leave the neighborhood the truck will stall whenever i stop.

Another piece of information i should let you know is the previous owner i bought the truck from had turned up the idle so it wouldnt stall. It was set somewhere around 2000+ and kept eating u-joints. I had a couple tbi units lying around so i kept swapping between them to fine one that runs better.

Offline Irish_Alley

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Re: stalling at stops and idle
« Reply #17 on: October 27, 2015, 09:26:50 AM »
Open loop is what the engine runs the engine when cold then it goes into closed when the engine meets certain requirements.
http://forum.73-87chevytrucks.com/smforum/index.php?topic=31489.msg264376#msg264376

As for what's causing it to stall is still a mystery but atleast we are getting somewhere
If you canít tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline 12gaige

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Re: stalling at stops and idle
« Reply #18 on: October 27, 2015, 06:58:49 PM »
Yeah i understand what closed and open loop are. I dont understand how the o2 sensor cross counts as soon as it is started but during closed it only reads rich.

Offline Irish_Alley

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Re: stalling at stops and idle
« Reply #19 on: October 27, 2015, 07:10:17 PM »
If I understand what your saying my take on it is the ecm ignores the od sensor till a certain temp is reached. Then the o2 gives its reading.
If you canít tell yourself the truth, who can you tell it to?~Irish_Alley

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Offline 12gaige

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Re: stalling at stops and idle
« Reply #20 on: November 01, 2015, 07:22:22 PM »
Found the problem. The distributor magnets were not strong enough. I changed the ignition modual under the cab, did nothing. Replaced the coil too, did nothing. Then i bit the bullet and went down to the dealership to pick up the new distributor they had in stock, and new cap and rotor. Now the truck never stalls.