I feel that Bob's thread on the frequency of rough engine starts needs a companion poll; whether it's caused by a warm-up cycle that was cut short or not. It seems to me like this is what is most often fingered as the culprit of the rough engine starts, but feel free to post other theories below.
Same rules as his, for ease: ZVW30, 2010 Prius owners only.
I just bought my first Prius, a used 2009. So far I like it very much. I just have one concern: The engine seems to run roughly, especially when it's idling and when it goes up to about 45mph. I'm not sure if this is normal for a hybrid and I'm just not used to it or if it indicates a problem. The problem persists even after it's warmed up.
View 17 RepliesI have a 1999 F150 4x4 5.4, I pulled the heads due to blown head gasket. Prior to pulling heads truck started and run fine other than miss on #1 cylinder. I timed the engine according to Haynes manual and posts on this site. Truck is now hard to start and idles very rough. I does seem to smooth out when reving the engine and seems to have plenty of power. Cant find any vacuum leaks or unplugged wires.
View 1 RepliesI am a new Prius owner. I have a 2014 model. When I leave the house the gas engine starts before I get out of the drive way. This is not normal is it.
View 19 RepliesSometimes I have to park my car two blocks away in the afternoon, and later in the evening i need to park my car back to the spots in front of my apartment.
EV mode won't be enough to last the two blocks, even at 7 bars. Or sometimes the car won't let me turn on EV mode, even at 7 bars (battery too cold).
So the engine must run if i want to park my car back near my apartment. But the two block distance will not suffice to completely warm up the engine
So the next morning... (20~ Fahrenheit)
My car knocks for a few seconds the next morning the car starts up...
What is the definition of completing the warm up cycle? 120F? My car will turn off the engine after coolant temp reaches 120F (ECO mode).
At 13,000 miles I've experienced the "rough start". Pulled it out of the garage to wash and wax it. I tried to put it in EV Mode but it wouldn't because the traction battery was down to only 3 bars, I assume. The engine only ran for 4-5 seconds than I shut it off, washed it and waxed it. Left it outside, temperature was about 55 degrees. When I went to start it about 2 hours later to run an errand it felt like the engine was down a cylinder and I shut it off immediately. I waited a minute and it restarted just fine. After reading the threads about the "rough start" I believe it happened because I didn't let it run through all the necessary cycles during the prior start up.
View 7 RepliesI had my car shipped (probably 8 days without being driven) and it has a flashing P when they try to start it, and the engine doesn't come on. Nothing happens if they try to shift to D but they say they can get it into Neutral and then roll the car.
View 4 RepliesMy Prius is having a problem during cold start. When I bought it, the cold start was very energetic with a high rev tone then gradually regulate to a normal pace and petrol engine shuts down. But about 4 months I noticed the tone of the cold start has changed, it starts with a weak and low engine rev and delays to turn off the engine. Today it took about 10 mins to power off the engine. Got 2 months I changed my 12V battery (Bosch now), thought that these symptoms was to notify that battery is failing. But the problem is persistent despite I put new battery..
View 7 RepliesI've been recently having the engine rattle/knock noise occasionally when I start the car. After my first oil change, I mentioned this to the dealer and demonstrated this to them while they documented the issue. I left my car at the dealership for investigation.
The following day, my dealer said they called Toyota and created a case about this. Toyota responded saying they heard about this and the possible root cause is the Motor Mounts on the Prius. They will be sending parts (date is still unknown) to fix the issue. :rockon:
I specifically asked if there is any damage to the engine and they said absolutely not and there is nothing wrong internally with the car. This also makes kinda sense because if I press the accelerator to the ground when it starts up, the knock doesn't appear. It also works if I put the car into D and drive away.
I've been recently having the engine rattle/knock noise occasionally when I start the car. After my first oil change, I mentioned this to the dealer and demonstrated this to them while they documented the issue. I left my car at the dealership for investigation.
The following day, my dealer said they called Toyota and created a case about this. Toyota responded saying they heard about this and the possible root cause is the Motor Mounts on the Prius. They will be sending parts (date is still unknown) to fix the issue. :rockon:
I specifically asked if there is any damage to the engine and they said absolutely not and there is nothing wrong internally with the car. This also makes kinda sense because if I press the accelerator to the ground when it starts up, the knock doesn't appear. It also works if I put the car into D and drive away..
Been having a problem starting the car (2010 T Spirit - 25k mileage RSH) in the mornings for about 3 weeks. When you power on, the dashboard lights up most options and the power light goes amber with no engine start.
This can take 5 or 6 attempts before getting the engine to start and then half the dashboard like the clock etc will not light up for that journey. Subsequent journeys that day are ok but the issue returns for the first start every day.
I am wondering how does the jump start works on the Prius since it uses a electric motor to start the engine but not a conventional starter.I recently drained the 12V battery (left the interior lights on for two days) and had to take the battery out from the trunk to recharge it. Initially, I tried to jump start it at the specific jump port at the front of the car but it didn't have any effect at all. By that, I mean as if there was no external power source given to the Prius - i.e., no lights came on and no response when pressing the Start button.
I mean zero electric current at the Prius. Is the electronic starter motor power driven by the hybrid battery? If that is the case, it may explain why jump start didn't work in my case because it only passes the power to the 12V battery which doesn't drive the electric starter motor. So what good is the jump start for if it doesn't work like a conventional car? How this process works on Prius?
I bought a new 2013 Toyota Prius Three. It has 23K mile on it now. I have noticed a weird noise with vibration from engine when I start the car for the first time in the morning. The first 10 or 15 seconds after it is on, there is no problem as soon as the engine wants to turn on (engage) I hear the noise. There is no engine light or triangle alarm on. What is going on?
View 7 RepliesI own a 2010 Seat Leon 1.4 TSI 125hp 6 speed manual with 20000km (same engine, transmission, electronics as a Golf - 1.4TSI 123hp or Audi A3 - 1.4TSI 125hp, in North America you can consider it a poor mans VW or Audi, i prefer Audi LOL).
Ever so often maybe once a month when the engine is cold (usually during cold weather and in the morning) the following happens:
I crank the engine and get a really rough idle that's about 300-500rpm... the engine struggles and then shuts off after about 5-10 seconds and while this is happening the CEL an EPC light are on. after the engine turns off by its self, the next time I start the engine it works perfectly.
I have taken the car to a certified VW workshop since its under warranty (4 years) several times and they have found no fault codes. The second time I took the car they flashed the ECU to the newest software. The other day (Fourth time) after the above happened again.. they hooked up the car to the diagnostics tool in front of me to prove there are no fault codes stored. I left the car for testing and they came up with nothing.
So I had 1st rough cold start today on 2010 Prius with 72K. Wasn't too cold low 40s. The fix was to shut it down and then turn on again.
Engine sounded like it was working on 3 cylinders. It is probably ignition or perhaps valve train issue.. with ignition being prime suspect. If it happens again I'll pull and check plugs.
I've had my 2010 Prius for about 3.5 years now and this is the 3rd maybe 4th time happening. This morning I started the car and the car started to vibrate/rattle from the engine bay. It almost sounded like the wheel of fortune being spun but louder.
View 5 RepliesI went to the workshop of Toyota in Iraq to repair the car. But do not have engineers repairing Prius cars. And they examine the device to detect faults only... These numbers faults
(P0A0F)Engine failed to start.
(P261C)water pump.
I have a 2005 Ford Explorer 4wd with 4.0 SOHC 6 cyl Flex Fuel. For months the vehicle has idle rough and increasingly becoming difficult to start. I decicded to replace the spark plugs and wires hoping to solve this issue! gap set to 052. When I started the vehicle it went into engine fail safe mode and wrench light came on. I then replaced the TPS on the throttle body and had no diference (I may have installed incorrectly! when I put it on the armature felt like it broke free inside the sensor). DTC codes read P0223, P2106, P2110 and with P0122 pending, P0223 pdg, P2106 pdg, & 2110 pdg.
With the old tps installed and wiring harness disconnected the truck will start in fail safe mode, but will not start at all with wire harness connected. A volt meter reads at computer end of wire plug 3.69 volts at pin one (gray/red wire +) and pin three (gray/white wire -) with key to on but not running.
1993 Buick Regal 3.1l V6 Multiport injection
Problem: The care currently has a hard start, and a fluctuating idle. I bought the car a year and a half ago it still has low miles about 94,000. The care used to start fine but had a fluctuating idle in the range of 750 to 2500 rpm. My brother who is a mechanic and doesn’t live near, do all the gaskets when he visited. Then the idle fluctuation dropped to 750 to 1000rpm, when the car rpms fluctuate there is a whirring sound I can hear from the cab, like a pump or pull system. On occasion there is a vibration as well but it is inconstant and irregular. Fuel pressure seems to fluctuate as well. If the car will not start I give it a little gas and it will run fine after a minute or two, but then the idle starts to fluctuate.
No fuse issues I can tell and relays seem to be fine.Checked for lose wiring connections found, none. I have replaced:
- Hoses and gaskets
- Starter motor
- Battery
- Fuel Pressure regulator
- Fuel Filter
- Spark plugs and wires
- TPS
- Idle Air control Valve
- Crank shaft sensor
- PCV.
Right now I’m thinking it could be the fuel pump (a nightmare to change on this car), a fuel injector failing, and the ignition switch.
I drive a 2004 Toyota Tacoma 4x4 and wound up doing a bit of unexpected rock crawling on a recent camping trip. After a whole lot of cussing and praying I got out with a couple of dents. Since then, I started to notice a strange noise. When I shift from 2nd to 3rd (~2500 rpm) and start to accelerate, I hear a metallic grinding/pinging for roughly a second. The clutch is fully released and it happens whether or not the engine is hot. It's the 2.7 liter 4 cylinder.
View 1 RepliesOn July 18 my 1999 Ford Windstar van was towed and diagnosed with a blown head gasket. I FINALLY got it back on Sept 4th and was told it was idling a little rough, but it was probably due to water that got in the catalytic converter and would work itself out. The next day we drove it about an hour away it was idling VERY rough and started to stall every time we came to a stop or tried to slowly pull into a parking spot. The following Monday September 8th it wouldn't start and the shop came and towed it back in. It's still there and they are saying they aren't sure what's wrong with it, but are assuring me the problem is unrelated to their repairs. Every time I call they continue to say they are working on it. Where do I go from here?!?!
View 10 Replies