Suzuki Carry Engine Light & Stalling: Air Valve Alert

Had a similar issue with my 2015 Suzuki Swift last year. With some experience working on small engine repairs, I recognized these symptoms as potential vacuum leak issues affecting the air supply system. The rough idle and stalling problems you describe match exactly what I experienced. After checking the obvious spots around the throttle body myself, I took it to a workshop where they found a deteriorated hose connection from the vacuum pump to the air valve. This was causing inconsistent air intake, leading to those acceleration problems. The total repair came to 175€, including parts and labor. The fix resolved all the symptoms, no more rough idle, stalling, or hesitation during acceleration. Before you head to a shop, could you share: Current mileage on your Carry, When was the last time you had a tune-up, Are there any other warning lights besides the engine light, Does the problem get worse when the engine is warm or cold This information would help determine if your issue is similar to what I experienced with the vacuum hoses. While visible inspection is good, sometimes these leaks are hard to spot without proper diagnostic tools.

Last service was done at 150000 KM, currently at 152068 KM. The vacuum leak diagnosis makes sense given my symptoms. I am noticing the engine stalling issues are getting worse, especially when the manifold pressure drops at idle. The mechanic I spoke with suspects the idle problems might be related to a failing air valve, but wants to do a proper pressure test to confirm. Have scheduled a diagnostic appointment next week. The shop quoted 85€ for testing and said parts could range from 150-300€ depending on what they find. Hoping its just a simple air supply issue and not something more serious. In the meantime, I found that keeping RPMs slightly higher at stops helps prevent the stalling. Will update once I get the official diagnosis.

Thanks for the update on your Carry. Your situation sounds identical to what I dealt with on my Swift, keeping the RPMs up to prevent stalling was exactly my temporary workaround too. The quote you got seems reasonable based on my experience. In my case, the air valve itself wasn't the culprit, but rather the degraded vacuum lines affecting the air supply system. The idle problems cleared up completely once the proper air intake path was restored. One thing to note, while waiting for your appointment, pay attention to whether the check engine light changes from flashing to steady. In my case, it started flashing intermittently before becoming constant, which helped the technician narrow down the diagnosis. The mileage on your Carry is very close to when I had my issues (around 155000 KM). This seems to be a common wear point for the air intake components on these engines. Looking forward to hearing what they find during the diagnostic test. Based on the symptoms and timing, I suspect you'll be looking at a similar repair to what I needed.

Thanks everyone for the helpful responses. Just got back from the shop and wanted to share the outcome. You were right about the vacuum system, they found two cracked vacuum hoses near the air valve that were causing the idle problems and engine stalling. The diagnostic fee was 85€ as quoted, and the total repair including new hoses and labor came to 220€. The check engine light is now off and the rough idle is completely gone. No more stalling when stopping either. For anyone else having similar symptoms with their Carry, my mechanic mentioned these vacuum hoses typically start failing around 150000 KM. Getting them checked during regular maintenance could prevent the issues I experienced. Glad it wasn't a more serious problem. The engine now runs smoothly and all the hesitation during acceleration is gone. Really appreciate all the advice that helped me understand what was likely wrong before taking it in.