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I have a 2006 equinox that only starts one out of every

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10-15 attempts. When it doesn’t...
I have a 2006 equinox that only starts one out of every 10-15 attempts. When it doesn’t start, it won’t even turn over. When it does start, it runs for about 3 seconds and shuts off. I have tried googling this and it appears to be a terrible problem with these cars. Unfortunately there aren’t many replies with resolutions to the problem. I saw the pcm as a big culprit, but it appears the one on this car was recently replaced as it has a newer refurbished model. Is this anti theft related?
Submitted: 2 months ago.Category: Chevy
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12/17/2017
Chevy Mechanic: Gary, Chevy Technician replied 2 months ago
Gary
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 17,606
Experience: 15 years GM master tech
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Welcome! My name is ***** ***** I will do my best to assist you with this problem.Ask me about added features such as phone contact anytime if you wish !

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Customer reply replied 2 months ago
Thanks
Chevy Mechanic: Gary, Chevy Technician replied 2 months ago

yes this issue is usually an anti theft issue

99 % of these replacing the passlock sensor which is built into the outer ignition lock cylinder case then performing a relearn should correct this type of issue which is very common for these

# 10 in this picture

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Customer reply replied 2 months ago
The person I bought it from advised it’s been replaced multiple times now and still has the issue. Can it be the relearn that didn’t happen? Do you have instructions on the specifically?
Chevy Mechanic: Gary, Chevy Technician replied 2 months ago

see if this will get it to run

30-minute Learn Procedure
1. Turn ON the ignition, with the engine OFF.
2. Attempt to start the engine, then release the key to ON. The vehicle will not start.
3. Observe the SECURITY telltale. After approximately 10 minutes, the telltale will turn OFF.
4. Turn OFF the ignition, and wait 5 seconds.
5. Repeat steps 1-4 two more times for a total of 3 cycles/30 minutes. The vehicle is now ready to relearn the Passlock(TM) Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK.
6. Start the engine. The vehicle has now learned the Passlock(TM) Sensor Data Code and/or password.

IMPORTANT: The vehicle learns the Passlock(TM) Sensor Data Code and/or password ***** the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

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Customer reply replied 2 months ago
Does this only work If the car turns over before turning it back to ACC? The security icon doesn’t stay on current state.
Chevy Mechanic: Gary, Chevy Technician replied 2 months ago

either or

so it does not stay ON ?

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Customer reply replied 2 months ago
Correct. When turning the key all the way to start it but actually starting it, the light shuts off along with all the lights on the right side of the dash. (Rpm side)
Customer reply replied 2 months ago
I just noticed when it does start, the small wrench and oil light come on on the bottom right.
Chevy Mechanic: Gary, Chevy Technician replied 2 months ago

when it will NOT crank can you see is the small wire at the starter shows close to 12 volts when you hold the key to crank position ?

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Customer reply replied 2 months ago
I assume someone needs to be holding the the key in cranj position while another is checking it. I will advise when I can get help.
Chevy Mechanic: Gary, Chevy Technician replied 2 months ago

ok

also with your fingers on the relay called starter in the under hood fuse box do you feel that relay click with your fingers everytime the key is held to the crank position ?

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Customer reply replied 2 months ago
it clicks every time
Chevy Mechanic: Gary, Chevy Technician replied 2 months ago

of if it clicks it can not be the theft system or computer

if its clicking everything is telling the relay to operate the starter

the issue will usually be a bad relay or connection where the relay plugs into or most common the starter is just bad

if you have close to 12 volts at the small purple wire at the starter solenoid when the key is held to crank then the starter is bad

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Customer reply replied 2 months ago
Something else to note is the fuel pump doesn’t even kick on unless it’s one of the times that it starts. Can it be fuel pump related? It’s just weird that there is no crank or anything happening the times it doesn’t start.
Chevy Mechanic: Gary, Chevy Technician replied 2 months ago

if that starter relay clicks it should not be related

see about the 12 volts at the small purple wire next

we could have an under hood fuse box failure if there is no power at the purple but the relay clicks which would explain most of your issues

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Customer reply replied 2 months ago
It has power. Relays were changed, same symptoms.
Chevy Mechanic: Gary, Chevy Technician replied 2 months ago

the purple does at the starter ?

if so be sure the connections are clean and tight at the starter if so the starter is bad

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Customer reply replied 2 months ago
I’d be glad to change the starter to see if that does the trick, but why would the fuel pump not even engage during the times it doesn’t turn over? I feel that says it’s programming or electrical.
Customer reply replied 2 months ago
also why would the car shut off after it’s started if it was the starter?
Chevy Mechanic: Gary, Chevy Technician replied 2 months ago

hard to tell but we first need to fix the starter issue

it should be cranking over if the purple shows 12 volts at it

we need to fix what we know is bad to start

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Chevy Mechanic: Gary, Chevy Technician replied 2 months ago

please dont forget to rate me here at Justanswer

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Chevy Mechanic: Gary, Chevy Technician replied 2 months ago

please dont forget to rate me here at Justanswer

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Chevy Mechanic: Gary, Chevy Technician replied 2 months ago

how are you making out ?

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