Prius (2001-03) :: Engine Knocking For 30 Seconds When First Starting Up
Jun 16, 2013
A few months back, I posted a problem with my '01 prius: engine knocking for @30 sec when first starting up. Does NOT happen on first start of day, only on subsequent ones. Random misfires not corrected by changing coils/plug. It's been in the shop for awhile, and no diagnosis. I'm ready to sell the thing, unless there is a quick fix. New hybrid battery 20# miles ago; used transaxle 10# miles ago (with 1.5 yrs left on 2 yr warranty); new tires 10 miles ago. Has 185,000 miles.
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The engine starts with knocking, rattling, and vibration that lasts for about 5 seconds. It seems to be an intermittent, rare event. With nearly 250,000 Prius in the North American market and the onset of cooler weather, it is time to see how frequently this occurs.
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Recently, when I start the engine (cold or even warm starts) I hear a subtle knocking noise that doesn't last too long but a few seconds. I figured that maybe it's because our area may still be using winter mix gasoline... but I'm not sure. Also, there's a rattle underneath the car when the engine switches into generating electricity with MG1.
This only happens after a start-up procedure (cold or warm). It stops when I push the gas pedal down a little bit (while still in park) then it goes into charging again, and by that time, it's stopped. I figured it may be a heat shield on the exhaust. It sounds more up in the front.
Also, when I start the car, the engine starts smoothly but then 1-2 seconds later goes into spinning MG1 which makes the car kinda sound like "vrrrrrrr---VRRRRRRRRrrrrrrrrrr...." .
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2001 Prius. Within 15 seconds of starting the engine, I captured the screeching sound from the engine bay. Noise went away after about 20 seconds. New serpentine belt and new 12v battery installed. Pass dealer 27-point check. Transmission fluid, inverter fluid, high voltage battery were replaced about 18,000 miles ago. Current mileage 174,000.
Noise is not from the serpentine belt. I attached a mp3 file of the sound. "2001 Prius Noise.MP3" ..... Which component is making this noise?
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I have an '01 Prius, 185,000 miles. A few years ago, it developed an engine (?) knock immediately after starting; disappears after 30 sec. It has gotten progressively louder and now runs very rough during those 30 sec. After that, just hums along.
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Sometimes 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).
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Sounds like a squirrel knocking on the rear hatch for a few seconds. Is this the fuel pump by any chance??
What i have noticed is that the relay clicking in the CECM is no longer clicking, yet now i hear this knocking in the rear hatch area when i start it up after it sits overnight.
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After starting my Prius the engine was knocking and shaking. After running the engine for 30 - 45 seconds it operated normally. The car is always parked in our garage and the outside temperature was approx 32 degrees or a few colder. I have 30750 miles on the car.
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I just turned 3000 miles on my C. I started the car and the engine chugged and knocked like I have never experienced. I turned off the engine and restarted and no problem. What gives?
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This is my new Prius C's engine warming up in the morning. The engine shakes once when starting up and I seems to be able to detect a slight knocking sound.
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When trying to drive my car out of the garage this weekend, it started backing up and then it stopped. It would also not do anything when I put it in drive. Next, the engine cut out. It would only stay on for a few seconds when starting it up again. It continued to do this. I had the car brought to my local mechanic who specializes in foreign cars. He called me today and said my car will not talk to the computer. He stated it must be the hybrid battery. He told me I need to take it to a Toyota dealer. My question is how to know if this battery is truly out and there is not another problem? I have a 2001 Prius.
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So My battery seems ok but the engine is running when I'm stopped a lot the last couple of days. I also hear a click from under the hood every once in a while like something is turning on.
Trying to even the voltage on a cell? I'm in SoCal but it's not hot or cold out.
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I have a 1.8T 2001.5 Passat, Tiptronic with an Upsolute chip. I recently had the turbo replaced (under warranty for the same stock one). After the turbo reinstall, the car did this after driving it a while: I ran it hard and spooled up the turbo good a few times, and then parked the car. I would wait 45-60 minutes. When I tried to start the car it wouldn't start for like 8 seconds on the ignition, and then it would start but in EPC mode!
The first time this happened I panicked, drove it home (just to make sure I got home.) I then tried again and it started fine and no more EPC. Also, if I wait much longer like 3 or 4 hours, it never happens. Since the first time, this has happened like 10 times or more. But now, I just turn it off right after it starts in EPC, turn it again, and it works fine.
The first time it happened I got some kind of codes, but I didn't save them and cleared them. I figured since it happened again, I would get the codes again, but they're not there. I took it to the dealer, and of course, they can't duplicate it. The codes where like speed implausible or not there or something but I can't remember now.
The master mechanic told me to vapor lock was not possible because I had no carb, but I seem to remember that my '83 fuel injects 280ZX turbo had a special cooler fan to cool down the injectors in the event of vapor lock after the car shut down so I'm pretty sure this is possible with injectors. I mean, the explanation for that fan was so that if the remaining fuel in the injectors would get so hot after car shut down that it would vaporize the fuel and the pressure would lock up the injectors.
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My 2001 Prius (230,000 miles) is unusable. I can clear the codes. The engine will start up fine. After a few seconds it starts bucking and jerking as if the engine is trying to engage something that won't turn and finally stalls. It is similar to a manual transmission car's action if you fail to push the clutch in when you stop the car. What the engine is trying to engage? I don't have any scanner to read the codes.
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I read the forums and found nothing quite like mine.
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Pretty soon this thing's gonna have ALL new parts and STILL running rough! The Jeep has about 40K on a Jasper motor, 175K on everything else. I was experiencing starting issues (crank for 20-30 seconds), and noticed a P0171 code on my odometer (O2 sensor?) so off to my mechanic. He replaced two O2 sensors, no change. New code read MAP sensor, replaced, no change.
Finally, changed Fuel Pump in tank (Fuel filter was changed 2 months ago), still no change. I tried starting it tonight by turning the key 5-10 sec. to prime gas, started but still rough at idle. Runs strong above idle 1500-2000RPM. Mechanic can't check fuel pressure at rails? for some reason. My next thoughts were spark plugs and vacuum lines...
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My car has less than 500 miles on it. Yesterday when I started it, I heard a knocking sound. I only put 87 octane gas in the car as the manual said 87 or higher. I don't know if I made a mistake putting 87 in there.
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I have recently noticed that my Azera makes a "knocking" sound right after starting the engine. It just about a dozen of fast short knocks one after another and it is gone after 2 seconds (like a diesel engine started on low temp. It appears more often when the engine is rather cold.
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I have a 2001 toyota prius. When I start the car and press on the gas pedal the engine rev's but nothing moves and there is some clatter from the engine. I can put it in B mode and drive it a short distance, but that's it.... The engine light has been coming off and on for a week now. It makes a loud audible tone and then I turn it off and back on and then it stops.
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I have a 2000 Accent with 90k miles. The last week or two, it takes about 5- 6 seconds of cranking to start when the engine is cold. Having had the car since new, I know that it's not normal.
The engine seems to crank strongly, and once started idles and drives well. This occurs once about every 4 starts when engine cold. Warm engine starts normal.
Changed plugs - no difference. Maintenance current per owners manual schedule.
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Weird noise I am hearing with my mothers new Elantra she just picked up. When starting engine has a knocking noise, not kinding. Letting motor run for a few minutes it goes away but is concerning. I was wondering if there is an issue with the MPFI engine which i believe is new this year which replaced the GDI engine. Definitely does not sound normal to me. to me it sounds like a rode knock or hydro lifter issue. Are these engines known for this. My mother traded her 2012 civic for this with 4500 miles. She did not like the seats and dash board layout in it and we got a good deal on this car.
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