Recent content by blanchard7684

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    Project Carbon Next Gen 10 Speed Valve Body Kit

    Fantastic info thanks. It is good to know an aftermarket upgrade exists. This is like the east coast bushing upgrade for Toyota needle bearing failures: the aftermarket had a really good solution that was cost effective.
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    Best Video Summary Of Cold Start Concerns

    Especially for di engines.
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    Engine shuts off while driving

    One big thing here is that the ecm is going between open loop and closed loop. If you are getting the P0016 cam/crank correlation code then the issue may be more related to variable valve timing or the reluctor wheel on crank or cam. I've seen P0016 along with a host of other cam timing codes...
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    Surging, bucking hesitation, cold ,throttle just off idle under 25 mph

    No codes is a killer in these situations. But the fact that it runs fine when warm is interesting. When the engine is cold it is in open loop. it is running off of pre programmed tables. Throttle inputs and mass air flow are mapped to a certain injector pulse width. This in theory should...
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    Engine shuts off while driving

    Hang in there. You've done some good work.
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    Surging, bucking hesitation, cold ,throttle just off idle under 25 mph

    do you know if you have the latest transmission program update? Did this issue just start? Any recent maintenance?
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    Engine shuts off while driving

    Yep. This is where I’d focus next.
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    Engine shuts off while driving

    @sasso thanks for the update. glad you have something concrete to work off of. What is the plan--change cam and crank sensor? This code makes sense that you would get a hard start after a shutdown. I'm interested to see if this is also causing the steering input malfunction as well.
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    Engine shuts off while driving

    Agree with above strongly. The dealer would have to workout something with Gm to get a tech on “ straight time” for an issue like this. The dealer would pay the tech and then work with gm later about recouping the labor time. This issue is definitely in this realm. So the more specific you...
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    Engine shuts off while driving

    That almost sounds like the alternator was getting bogged down and the engine hit a stall point ( before the throttle could respond) I had something very similar happen to a 2024 f150 work truck I use. I pulled into a parking area, turned the wheel sharply to position truck for reverse in, hit...
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    Engine shuts off while driving

    Dang… Fuel , spark, pulse, and I’m assuming no issue with throttle body ( air flow). Every two hours of engine operation , a brake pedal and steering input makes it stop and can’t be restarted for extended period. With no codes stored. The ecm must be thinking everything is fine. Either...
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    Engine shuts off while driving

    So verified spark and fuel. If you are positive you have fuel delivery up to the injectors then the next thing is making sure the injectors are getting a signal to pulse Are you able to disconnect an injector to see if it is getting a pulse? A volt meter or test light of some sort can work
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    Engine shuts off while driving

    I would try to see if the issue can be whittled down to steering, brake, or if it has to be both.
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    Engine shuts off while driving

    See edit. I was thinking it may be good to disable this to see if there is an effect.
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    Engine shuts off while driving

    Is this more dependent on steering input or brake input? Edit: if brake input is causing this it could be a leaky brake booster. Any funny whooshing type noises near the brake master cylinder? If it is steering input my instinct is that something is disrupting the ignition switch . Not sure...
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