'06 CTS Lux Perf Pkg, '05 Escalade 2WD & '15 ATS4 Coupe Performance
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101 Posts
This is kinda hard to explain but here ya go....In the mornings when I start the car, it starts instantly as it has since new in 2006. Immediately after approx. 3-5 seconds, the engine strains and the valves chatter as if it is loaded severely. This actually started during the winter months although it seldom gets below 32 degrees down here in Houston. I took it to a dealer but I think they were just trying to sell me a car. My car has >180k miles. Later I've noticed as the weather warmed, the problem had gone away but recently returned a couple days ago. btw....this only happens after the has car sat overnight. After my 20 mile drive to work in the morning, it starts just fine the remainder of the day.
I suspect there is some kind of sensor failure happening; sort of like the old stuck choke plate in carbed engines back in the day. The straining only happens momentarily, like 1-2 seconds, not long enough to shut down the engine. The car otherwise runs and drives just fine. The dealer tried to convince me it is the timing chain since the car is old with high mileage. I think if it was a timing chain issue, I would be experiencing other power issues as well and and a constant occurrence. The check engine light is not illuminated either.
Hopefully somebody out there may have some info to help me out.
Much appreciated,
~alan
I suspect there is some kind of sensor failure happening; sort of like the old stuck choke plate in carbed engines back in the day. The straining only happens momentarily, like 1-2 seconds, not long enough to shut down the engine. The car otherwise runs and drives just fine. The dealer tried to convince me it is the timing chain since the car is old with high mileage. I think if it was a timing chain issue, I would be experiencing other power issues as well and and a constant occurrence. The check engine light is not illuminated either.
Hopefully somebody out there may have some info to help me out.
Much appreciated,
~alan