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Joined: Oct 2002
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Hi, I just had a 2800$ Trany + Clutch replacememnt, and two new alternators. The car was running good for 2 weeks. Now everytime I am driving, when I take off (5spd) if I give it too much gas (which is halfway down on pedal) the car starts bucking (hard mind-you) and will do it through 3rd, unless I barely give it gas. I've been told by a guy at autozone that it is do to my "Vacuum hose." Any ideas on if this is correct? If you need more details, please ask. As far as I know that's all the car does. If it IS the vacuum hose, then i'm curious as to if this easy to replace, or let my mechanic do it? Thanx in advance for the  ! -Jeremy Houston, TX
Jeremy AKA Jai
**'95 SE Contour / Midnight Purple (R.I.P)**
--------------------------------------------
Hopefully soon to own a candy red 1992 Caddilac STS ~ w00t w00t!
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Joined: Mar 2003
Posts: 7,117
Hard-core CEG'er
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I'm thinkin' fuel pump. See if you can get the fuel pressure checked. Maybe some of the other guys can chime in...
Must be that jumbly-wumbly thing happening again.
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Joined: Sep 2000
Posts: 449
CEG\'er
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CEG\'er
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Originally posted by yungin16TX:
Hi,
I just had a 2800$ Trany + Clutch replacememnt, and two new alternators. The car was running good for 2 weeks. Now everytime I am driving, when I take off (5spd) if I give it too much gas (which is halfway down on pedal) the car starts bucking (hard mind-you) and will do it through 3rd, unless I barely give it gas. I've been told by a guy at autozone that it is do to my "Vacuum hose." Any ideas on if this is correct? If you need more details, please ask. As far as I know that's all the car does. If it IS the vacuum hose, then i'm curious as to if this easy to replace, or let my mechanic do it? Thanx in advance for the !
-Jeremy
Houston, TX
I'm having the same issue and now my rpm needle is acting weird all on it's own too, so I'm starting to think something's up with the RPM signal or TPS. Things I've replaced or checked with no luck: plug wires and plugs, fuel filter, & MAF. Gotta hook up the OBD2 software to see if that sheds any light on it - may be a fuel issue though (pump or injectors)??
98.5 SVT now gone ... new wheels = 2005 330i
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Joined: Jun 2003
Posts: 1,145
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Hard-core CEG\'er
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Originally posted by yungin16TX:
Hi,
I just had a 2800$ Trany + Clutch replacememnt, and two new alternators. The car was running good for 2 weeks. Now everytime I am driving, when I take off (5spd) if I give it too much gas (which is halfway down on pedal) the car starts bucking (hard mind-you) and will do it through 3rd, unless I barely give it gas. I've been told by a guy at autozone that it is do to my "Vacuum hose." Any ideas on if this is correct? If you need more details, please ask. As far as I know that's all the car does. If it IS the vacuum hose, then i'm curious as to if this easy to replace, or let my mechanic do it? Thanx in advance for the !
-Jeremy
Houston, TX
most likely a fuel pump problem, probably going out on you, like force said get your fuel pressure checked that will tell you alot, LBVSVT you should check yours too, as for the rpm jump, my old honda did that, but it was because of a alternator problem
98.5 Black SE ATX
S&B filter, SVT MAF, optimized SVT TB, mesh grille, removed orange reflectors, painted rear reflector, gutted pre-cats, optimized SVT LIM, 19lb injectors, resonator removed
cant afford an svt but lookin for 1 in nc
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Joined: Jul 2004
Posts: 129
CEG\'er
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CEG\'er
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New plugs and Redline fuel injector cleaner greatly reduced my 99's bucking.
Slow Vehicles in Training
01' Lightning
99' SVTC
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Joined: Nov 2003
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I'm having the same issue and now my rpm needle is acting weird all on it's own too
Sounds like your alternators going out. Go to Autozone and have them check it.
"Eagles may soar high, but weasels don't get sucked into jet engines."
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Joined: Nov 2003
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Have you replaced the battery recently? I had a 1990 Turbo Laser that kept going through alternators. It turned out that my replacement battery was a little too tall and the positive terminal of the battery was grounding out on the hood when I closed it.
"Eagles may soar high, but weasels don't get sucked into jet engines."
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Joined: Sep 2000
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Both the alternator and battery are about a year old. Yesterday, I removed the RPM pickup wire that I use when doing A/F on the Innovate Motorsports LM-1 A/F monitor from the appropriate ECU wire and the dancing rpm needle was ok last night. I'll have to keep an eye on it, but thanks for the input guys!
98.5 SVT now gone ... new wheels = 2005 330i
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Joined: Sep 2002
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I started bucking at 80k. But it goes away after the secondaries kick in. This is continued through all gears. I will try to fig this out before winter. But no promises as I drive the car a whole lot of never. It's not priority.
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Joined: Mar 2003
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Originally posted by MapOfTaziFoSho:
I started bucking at 80k. But it goes away after the secondaries kick in. ... I drive the car a whole lot of never.
This sounds like:
1) Dirty MAF
2) Air leak - check that accordian tube, & have you ever removed the UIM/LIM? If so, 80k sounds like a good time for a few gaskets.
Must be that jumbly-wumbly thing happening again.
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