 car is bucking under acceleration...any ideas? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| era vulgaris |
 Aug 27 2014, 02:04 PM
Post
#1
|
|
J is for Genius  Group: Members Posts: 982 Joined: 10-November 13 From: Raleigh, NC Member No.: 16,629 Region Association: South East States  |
My car has developed an extremely annoying bucking under acceleration. It started about a week ago, and at first it would only happen while accelerating out of a fast turn. But now it does it all the time while accelerating. It's like the car is oscillating between half power and full power, making it lurch-slow-lurch-slow-lurch-slow. It's like you're riding a bucking bronco or something. The only cure seems to be to get off the throttle completely, upshift, then slowly accelerate.
Anyone have any idea where I should start looking first? |
   |
 
|
  |
Replies
| era vulgaris |
Aug 28 2014, 01:29 PM
Post
#2
|
|
J is for Genius Group: Members Posts: 982 Joined: 10-November 13 From: Raleigh, NC Member No.: 16,629 Region Association: South East States |
So first I cleaned every contact I could find in both the ignition and FI systems. Didn't help the problem at hand although the engine does run a little smoother.
Then I changed the fuel filter...and holy crap! That was it....mostly. I drove around for about 30 min and the car had completely woken up with smooth acceleration. I did have a couple very slight instances of bucking, and I suspect a professional fuel tank cleaning is in my future. Especially judging by the crap that came out of the old fuel filter! But it's 99% better than what it was before changing the filter. |
|
|
|
Posts in this topic
era vulgaris car is bucking under acceleration...any ideas? Aug 27 2014, 02:04 PM
Mike Bellis sounds like a lack of fuel. Aug 27 2014, 02:50 PM jt914-6 When you get the bucking worked out check your mot... Aug 27 2014, 03:23 PM Rand Don 't know if the TPS would cause bucking to ... Aug 27 2014, 03:45 PM wndsnd Car still have the Djet?
Has the tank ever been c... Aug 27 2014, 03:45 PM era vulgaris Motor mounts and trans mounts are still good.
TPS... Aug 27 2014, 04:32 PM
brp986s
Motor mounts and trans mounts are still good.
TP... Aug 27 2014, 07:31 PM era vulgaris Any chance a dying fuel pump would cause this?
Ju... Aug 27 2014, 04:52 PM Mike Bellis
Any chance a dying fuel pump would cause this?
J... Aug 27 2014, 06:52 PM scotty b Check all of the vaccum lines. there is one in par... Aug 27 2014, 07:18 PM jasons When my 2.0 did this, it was the trigger points in... Aug 27 2014, 07:21 PM mepstein Mine did this. Did a LOT of things to try to fix b... Aug 27 2014, 07:52 PM warrenoliver Could be a loose ground wire on your distributor p... Aug 27 2014, 09:16 PM era vulgaris
Check all of the vaccum lines. there is one in pa... Aug 27 2014, 09:44 PM BeatNavy
I think it's probably worth reading this thre... Aug 28 2014, 04:30 AM 76-914 What's your fuel pressure? Aug 27 2014, 09:46 PM The Cabinetmaker I'm surprised that no one has mentioned the f... Aug 28 2014, 04:03 AM dknechtly There's a lot of good advice here. Make sure ... Aug 28 2014, 07:55 AM Phoenix914 :headbanger: :Qarl: :driving: Aug 28 2014, 03:43 PM The Cabinetmaker don't you love the simple fixes Aug 28 2014, 04:19 PM era vulgaris Definitely! :Qarl: Aug 28 2014, 04:40 PM era vulgaris Celebrated too soon :(
Went for another drive t... Aug 28 2014, 09:44 PM PancakePorsche
Celebrated too soon :(
Went for another drive ... Aug 29 2014, 02:33 AM era vulgaris Got a friend bringing over his fuel pressure gauge... Sep 2 2014, 05:35 PM Rand
Disregard that since you have a carb now. You don... Sep 2 2014, 06:20 PM era vulgaris
Disregard that since you have a carb now. You do... Sep 2 2014, 07:12 PM r_towle I would suggest a few things.
A new fuel tank sock... Sep 2 2014, 09:47 PM era vulgaris
I would suggest a few things.
A new fuel tank soc... Sep 3 2014, 09:05 AM BeatNavy
Is there a good guide somewhere to pulling and c... Sep 3 2014, 09:22 AM era vulgaris
I say again (from page 1 of this thread), you may... Sep 3 2014, 10:49 AM BeatNavy
[quote name='BeatNavy' post='2081511' date='Sep 3... Sep 3 2014, 01:24 PM 914_teener
I would suggest a few things.
A new fuel tank soc... Sep 2 2014, 10:22 PM era vulgaris
Couple of extra things I thought of:
Check your... Sep 3 2014, 09:08 AM 914_teener :agree:
I assumed you had already done this.
Ge... Sep 3 2014, 09:47 AM BeatNavy Sorry, a couple more things to note: you probably... Sep 3 2014, 02:08 PM era vulgaris
Sorry, a couple more things to note: you probabl... Sep 3 2014, 04:05 PM BeatNavy
Sorry, a couple more things to note: you probab... Sep 3 2014, 04:18 PM jacksun hi, maybe the below will help?
"Throttle Swi... Sep 3 2014, 07:52 PM era vulgaris Aha! i finally got it. After a couple weeks ... Sep 15 2014, 11:47 AM BeatNavy
check the obvious shit first before diving into t... Sep 15 2014, 11:56 AM era vulgaris
But at least you learned a lot of things that co... Sep 15 2014, 01:10 PM dknechtly Geesh, thanks for posting the solution. That... Sep 15 2014, 12:16 PM |
14 User(s) are reading this topic (14 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 28th December 2024 - 02:26 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.