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| This is a discussion on Shuddering on acceleration within the Generation 1 Prius Discussion forums, part of the Gen II Prius Main Forum category; From cold my Gen1 drives fine, after about 15 minutes you can start to feel it vibrating upon accelerating which ... |
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Shuddering on acceleration
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10-12-2009, 05:56 PM
| #1 |
| Junior Member Join Date: Oct 2009 Location: Ireland
Posts: 8
My Car: Other Hybrid Model: N/A Package: N/A Thanks: 0
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Friends: 0 |  Shuddering on acceleration From cold my Gen1 drives fine, after about 15 minutes you can start to feel it vibrating upon accelerating which gets worse as it continues to warm up. When stopped in neutral the engine bay seems to vibrate as if struggling some what. Could this be a problem with the transaxle? |
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10-13-2009, 01:07 AM
| #2 | |
| 03 and 10 Prius  Join Date: Nov 2005 Location: Huntsville AL with 2003 Prius
Posts: 3,885
My Car: 2010 Prius Model: III Package: #1 Thanks: 148
Thanked 370 Times in 206 Posts
Friends: 20 | Re: Shuddering on acceleration Quote:
Bob Wilson | |
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10-13-2009, 10:48 AM
| #3 |
| Senior Member  Join Date: Aug 2008 Location: Toronto
Posts: 161
My Car: 2002 Prius Model: I Package: Navigation Thanks: 4
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Friends: 1 | Re: Shuddering on acceleration Sounds like you need some fuel injector cleaner, maybe throttle body cleaner as well. Seems like you have a tremendous amount of carbon buildup in the engine. Try some Duralube as well. It should help. Sounds like as your engine is heating up, the carbon is detonating the fuel before the spark has had a change to ignite it. Get this done soon, as too much detonation can cause severe damage to your engine. A simple $20.00 fluid can save thousands in repairs. Please keep us posted. |
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10-13-2009, 05:59 PM
| #4 | |
| Junior Member Join Date: Oct 2009 Location: Ireland
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Friends: 0 | Re: Shuddering on acceleration I just rolled it down the hill in 'D' with the engine off and it felt fine, I'll try some cleaner tomorrow. thanks for the replies! Quote:
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10-13-2009, 06:27 PM
| #5 |
| Junior Member Join Date: Oct 2009 Location: Ireland
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Friends: 0 | Re: Shuddering on acceleration . Last edited by matthis; 10-13-2009 at 06:30 PM. Reason: double post |
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10-14-2009, 04:10 AM
| #6 |
| 03 and 10 Prius Join Date: Nov 2005 Location: Huntsville AL with 2003 Prius
Posts: 3,885
My Car: 2010 Prius Model: III Package: #1 Thanks: 148
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Friends: 20 | Re: Shuddering on acceleration Cleaning the throttle body is fairly easy: http://hiwaay.net/~bzwilson/prius/pri_throttle.htmlStart with testing the throttle and if it is sticky, you may have an easy fix. Bob Wilson |
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10-14-2009, 05:29 AM
| #7 |
| Senior Member Join Date: Jun 2004 Location: hell
Posts: 2,894
My Car: 2004 Prius Model: N/A Package: #9 Thanks: 9
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Friends: 5 | Re: Shuddering on acceleration my 04 started acting like that when the ignition coil was failing. if the gen I's are anything like my Gen II... then you just about have to unplug the spark plugs or ignition coils before it throws codes ( just fyi).... |
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10-14-2009, 08:29 AM
| #8 |
| An Aussie perspective  Join Date: Jul 2007 Location: Adelaide South Australia
Posts: 9,273
My Car: 2004 Prius Model: N/A Package: Base Thanks: 133
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Friends: 33 | Re: Shuddering on acceleration Might be an ignition coil having a holiday. |
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10-14-2009, 09:54 AM
| #9 |
| Junior Member Join Date: Oct 2009 Location: Ireland
Posts: 8
My Car: Other Hybrid Model: N/A Package: N/A Thanks: 0
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Friends: 0 | Re: Shuddering on acceleration cleaned the throttle body, and added injecter cleaner to the fuel. There was an instant improvement from cleaning the throttle body but the problem is still there although less extreme. The problem is now most noticable when stopped in P or D while the HV battery is charging. I'll move on to the ignition coils next! |
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10-14-2009, 01:13 PM
| #10 |
| Junior Member Join Date: Oct 2009 Location: Ireland
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Friends: 0 | Re: Shuddering on acceleration ok so me and a mechanic friend got to the bottom of this. Coils/plugs 1 and 2 where drenched in water. After running some water down the windscreen it was found that the water was leaking between the rubber seal and the plastic sill it connects to which are directly below the wipers, the water collects at a small point of the plastic which extrudes downwards where it drips onto coils 1 and 2. We applied sealant between the rubber, the plastic and the metal frame they both sit on to stop the water from dripping here. Strangly enough he had replaced the plugs in June and said there had been no sign of moisture then. After cleaning out the coil packs and reconnecting them everything seems fine. Thanks for you help with this. much appreciated!! |
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| acceleration, shuddering |
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