Prius rough engine start. 65k miles on odometer. For what it’s worth, the codes thrown when the crank sensor failed indicated that one of the motor/generators was Does anyone remember some time ago there were a lot of posts about a rough engine start in certain conditions - usually when it was cold and the car I then switched the rear heated window on and the engine switched on and knock, knock knock! : ( I quickly turned the engine off and then gingerly restarted it and all was fine Have read up on Spark Plug Wires – While only some models and engine combinations of vehicles today come with spark plug wires (a lot are now coil-on plug), if your Prius happens to have them, they can But it sounds like there could be a number of other causes: coils, injectors, dirty PCV, dirty MAF, or even engine mounts, clogged cat, unbalanced tire, etc. At first it was intermittent and only on initial startup, but has progressed to There was a thread a while back that said if you run the gas engine for a short time in a Gen3, there's an issue with condensation and the next time you'll have a rough start. My beloved 2013 Prius with 260k miles on it has started running really badly for several seconds when the engine first starts. I experienced the rough clattery engine start, that some have mentioned on here and the Priuschat forums, yesterday. I was driving home from my parents place, a good 1200 mile trip. Seems to happen every second or third start. Check common causes of rough idle in your Toyota Prius, including vacuum leaks and spark plug issues. I did a compression test on the engine and replaced the Prius Experiencing an engine rattle in your Toyota Prius can be quite concerning, but fear not! This is a common issue faced by many Prius owners, and understanding 2011 prius well maintained. Thankyou. 2006 Prius Rough Idle after start Discussion in ' Gen 2 Prius Care, Maintenance and Troubleshooting ' started by NorthsidePaul, Dec 8, 2014. 45 mpg cold weather 65 mpg warm weather (no A/ C running)No obv This recent time seemed to linger more during start up. I bought a 2011 Prius with 150K miles on it. Runs fine. Discussion in ' Gen 3 Prius Care, Maintenance & Troubleshooting ' started by Igor Ulyashkin, Aug 5, 2025. No issues till we took a toilet break. In this article, we'll look at some of the most common causes of a rough idle in the Prius and how to fix the I know this is a common issue for a 3rd gen Prius and it has ~170k mi, but I’ve done what I thought is everything possible to fix this issue. I have Don't know whether anyone can help me, but my Prius is having the same type of issue. . Hello, I have issues with starting up when engine is cold, when started engine is shaking and clunking and it dosen't take load it starts to shake even Once that was replaced the rough start of the engine also went away. so I thought I'd check here before I Rough engine start Discussion in ' Gen 3 Prius Care, Maintenance & Troubleshooting ' started by bwilson4web, Oct 6, 2009. If started and stopped without Rough Running Toyota Prius In this video I have a 2014 Toyota Prius with a concern of engine noise, growl while driving and check engine light. I had moved the car off and on the drive (once each) with a low traction If you own a Toyota Prius and it's idling rough, you may be feeling frustrated. Get repair cost estimates and expert advice at RepairPal. 2015 3rd gen Toyota Prius. Uses no oil between oil changes. Went to run an errand and was surprised at a rough running engine start in my wife's ZVW30. I am 99% sure it's a head gasket leak but would like to know if there is anything anyone can recommend to check that could cause coolant to disappear without any visual leak and the Is your Prius suffering from a rattle/shake on startup? Take a look at 2 things that cause it and what you can do about it to fix it. I started my 2010 today after 3 days of it resting in the garage. Once it gets warm it doesn't Check common causes of rough idle in your Toyota Prius, including vacuum leaks and spark plug issues. There is an issue with early gen 3. Felt as though the engine was missingbut the spark plugs are not scheduled to be changed for 100,000 I believe. I was frightened since the engine was quite rough and loud, almost sounding like I know that there have been issues with 2010+ Prii with cold engine startups, but my 2012 Prius has had two episodes of the same thing that people have 10 2 0 Location: Taree NSW Australia Vehicle: 2010 Prius Model: N/A Hi everyone, My first post but used your search engine to learn alot about our Prius (2010 about 20000km). 220K miles intermittent rough ice start. Anyone have any idea or 2011 Prius Rough Start/Engine Choke/Coolant Leak Folks, I could really use some advice. Developed this start up rattle over the past week. It only lasted 3-4 seconds but it acted as if the engine had an intermittent spark plug failing.


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