2007 Chevrolet Colorado Stalls While Braking.

AGAXIOLA

MEMBER
2007 CHEVROLET COLORADO
3.7L
5 CYL
2WD
AUTOMATIC
124,000 MILES

Okay guys, I really need your help. I have checked my truck and changed the sensors that came up as faulty with the obd scanner. I have changed the Mass air flow sensor and the secondary air intake valve, I still have the same problems. The truck stalls while braking specially when cold and it also does not turn on at times and I have checked other forums and I have been told that the reason the truck wont start is because of the pass lock sensor in the ignition. How can I fix these problems I learned that the stalling might be the IAC needs cleaning but I have not found out how to clean it. Any suggestions?

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Okay, question. Does it stall while braking or does it not start? An idle issue could be the result of an IAC or even a vacuum leak, but you should be able to get it started. Let me know what is going on for you.

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Tuesday, November 11th, 2014 AT 8:05 PM

AGAXIOLA

MEMBER
2 POSTS

I have both problems but they are not related I believe. At any time during the day mainly in the mornings the anti theft light blinks and the truck will not start and I have to wait 10 minutes. The stalling happens while braking or while going down hills and braking. If I don't look at the RPM's and accelerate when they get too low I stall.

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Tuesday, November 11th, 2014 AT 9:23 PM

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Yes, there are two different problems. The anti theft needs addressed by a dealer that has the proper test equipment to check codes. The stalling is most likely the IAC or a vacuum leak.

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Thursday, November 13th, 2014 AT 5:21 AM