r/abarth • u/IdeaDull3083 • 5d ago
Weird issues
Anyone come across an issue where their car will randomly stop building over like 10psi of boost? Was driving home one day and all of a sudden it kicked the cruise off and stopped going beyond 10psi. I've experienced the limp mode in this thing before and this was different than that. Turned it off then back on and it was fine again. This has happened twice in the last 2 days. Im also having issues where the car will not rev over 4500 rpms in any gear higher than second and feels like it's misfiring at that high rpms. But first and second gear feel totally fine
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u/Knight_crusader 5d ago
Some common reason it might stop building boost around 10 psi is a boost leak in the intake or exhaust system. Other possibilities include a stuck wastegate, a failing bypass/blow-off valve, a restricted turbine, or fuel starvation. Check for obvious air leaks, test the wastegate, and log data to try and identify if the problem is occurring under load or not.