 car is bucking under acceleration...any ideas? |
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| era vulgaris |
 Aug 27 2014, 02:04 PM
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#1
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J is for Genius  Group: Members Posts: 986 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? |
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| era vulgaris |
Sep 15 2014, 11:47 AM
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J is for Genius Group: Members Posts: 986 Joined: 10-November 13 From: Raleigh, NC Member No.: 16,629 Region Association: South East States |
Aha! i finally got it. After a couple weeks or whatever of dealing with this, and after cleaning the dizzy, cleaning every electrical contact I could find, after replacing the fuel filter, and after thinking I had a bad intake air temp sensor, and having nothing permanently fix the problem...I finally figured the issue out!
I decided to clean all the multi pin connectors on the relay board today, and when I went to unhook the negative battery terminal, the clamp broke off of the main ground wire that connects to the chassis. There were probably only a couple wires of the multi core cable still attached to the clamp, which would've not been enough to handle the full current all the electronics needed. Probably on occasion the wire would move close enough to the connector to make decent contact for full power, and then move away again when I'd lose power. Got a new connector on there and the car is GOLDEN! (IMG:style_emoticons/default/aktion035.gif) Full power under all driving conditions, and everything on the car seems to be working better. Moral of the story: check the obvious shit first before diving into the complex stuff! |
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| BeatNavy |
Sep 15 2014, 11:56 AM
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#3
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Certified Professional Scapegoat Group: Members Posts: 2,960 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region 
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QUOTE(era vulgaris @ Sep 15 2014, 01:47 PM)  check the obvious shit first before diving into the complex stuff! Amen brother! (IMG:style_emoticons/default/piratenanner.gif) But at least you learned a lot of things that could help later. |
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| era vulgaris |
Sep 15 2014, 01:10 PM
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#4
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J is for Genius Group: Members Posts: 986 Joined: 10-November 13 From: Raleigh, NC Member No.: 16,629 Region Association: South East States |
QUOTE(BeatNavy @ Sep 15 2014, 01:56 PM) But at least you learned a lot of things that could help later. Very true! Thanks to everyone that lent suggestions and help! (IMG:style_emoticons/default/beerchug.gif) |
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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 era vulgaris So first I cleaned every contact I could find in b... Aug 28 2014, 01:29 PM 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 dknechtly Geesh, thanks for posting the solution. That... Sep 15 2014, 12:16 PM |
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