314: Crank-Start-Stall
About this episode
Explore the complexities of diagnosing crank-start-stall issues, focusing on distinguishing immobilizer problems from other causes. The discussion covers how different manufacturers handle immobilization, with examples from Mercedes and GM. Key diagnostic tips include checking injector pulse, fuel pressure, timing, engine breathing (intake and exhaust restrictions), and sensor inputs like crank and cam sensors. Real-world cases illustrate how subtle issues like plugged exhausts or faulty sensors can cause engines to start then stall. The importance of listening to engine sounds and using scopes for detailed diagnostics is emphasized throughout.
Expanding on the topic from last week's episode on tips for determining if a vehicle is immobilized or not, this week I touch on the car exhibiting a crank-start-stall symptom. While an immobilizer system CAN cause this in some vehicles, there are several other possibilities as well, and today I'll share my thought process on working through this type of problem.
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Chevrolet Cruze
"...er situations on the intake side like this, Chevy Cruze that somebody put, I think they put an engine int..."
Toyota Camry
"... restrict breathing on the engine. I had a Toyota Camry like that where the cat was so plugged"
Patriot Jeep Patriot
"... experienced various ones over the years. I had a Jeep Patriot, I think it was a 15 Jeep Patriot with a 2.4 rece..."
GMC Acadia
"cause this as well. Had a GMC Acadia with a three six where somebody did a big engine ..."
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