Weak Acceleration! Need a diagnosis!!! - BMW Forum - BimmerWerkz.com
BMW Forum BMW Forum

Ľ Auto Insurance

» Featured Product
Ľ Wheel & Tire Center

Go Back   BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E21, E30)
Register Home Forum Active Topics Gallery / Showroom Auto Loans Garage Search Today's Posts Mark Forums Read Auto EscrowInsurance

3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

BimmerWerkz.com is the premier BMW Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 11-30-2005, 10:38 PM   #1 (permalink)
n00b
 
dagli's Avatar
 
Join Date: Nov 2005
Location: Missouri
Car:
Posts: 15
Photos:
dagli is on a distinguished road
Weak Acceleration! Need a diagnosis!!!

Okay, here's my problem. I have a 1987 325es, and I've been happy with it for a while, but now it's just come to my attention that my gas pedal may be "sticking". You see, when I put it into gear and hit the gas pedal my car lags for a brief second or two, then goes ahead and pulls me forward. Is this one of the characteristics of the economy series; a weak, initial acceleration? Would a performance chip solve this problem?

What do I have to do to bring back a strong gas pedal like this car must have at one time had?

With a straight 6 under my hood I'd like to maximize it's true potential, but this lag in the the pedal to the engine proves to be a pesky problem.
dagli is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-01-2005, 07:37 AM   #2 (permalink)
Teh Peetsa Gai
 
ldsbeaker's Avatar
 
Join Date: Apr 2004
Location: Havelock, NC
Car: '86 325es, '87 535is
Posts: 3,478
Photos:
ldsbeaker has a reputation beyond reputeldsbeaker has a reputation beyond reputeldsbeaker has a reputation beyond reputeldsbeaker has a reputation beyond reputeldsbeaker has a reputation beyond reputeldsbeaker has a reputation beyond reputeldsbeaker has a reputation beyond reputeldsbeaker has a reputation beyond reputeldsbeaker has a reputation beyond reputeldsbeaker has a reputation beyond reputeldsbeaker has a reputation beyond repute
I've had this happen a bit... I think my clutch is on it's way out.
__________________
'86 325es (TURTL3): PJ peetsa hawler
'87 535is (BADWATER): almost done... really.
'86 325e (GRN HLL): DD/show/rocket
'04 x3 3.0i: Wife's Bimmer (manual, woot!)
My BMW Blog
ldsbeaker is offline   Reply With Quote
Old 12-01-2005, 09:09 AM   #3 (permalink)
77th Gear Member
 
325eXTATIC's Avatar
 
Join Date: Mar 2005
Location: See at ell! aka HOME!
Car:
Posts: 553
Photos:
325eXTATIC is a glorious beacon of light325eXTATIC is a glorious beacon of light325eXTATIC is a glorious beacon of light325eXTATIC is a glorious beacon of light325eXTATIC is a glorious beacon of light
Send a message via ICQ to 325eXTATIC Send a message via AIM to 325eXTATIC Send a message via MSN to 325eXTATIC Send a message via Yahoo to 325eXTATIC
you want to maximize all the links in the chain so to speak... Spark Plugs, Wires, Cap, Rotor, Throttle Cable, Air Filter, CLEAN YOUR INJECTORS!!! And as the Turtl3 mentioned... Could be your clutch starting to slip.

Just a few ideas!

Josh W.
__________________
Not currently on the Bimmer kick. Drivin' a 2003 Silver Civic at the moment, but I am STILL the Founding Member of the "325eXTATIC You're my hero" club.
Quote:
Originally Posted by <b>superdeadman</b><br>Josh W. IS my hero!

Originally Posted by <b>JoeMadoo</b><br>325eXTATIC, you're my hero...
Originally Posted by <b>Moosepuck</b><br>Oh yeah... 325eXTATIC...you're my hero...
Originally Posted by <b>e30dream</b><br>325eXTATIC....youre my hero.
325eXTATIC is offline   Reply With Quote
Old 12-01-2005, 02:04 PM   #4 (permalink)
n00b
 
Morgenster's Avatar
 
Join Date: Sep 2005
Location: Antwerp, Belgium
Car:
Posts: 29
Photos:
Morgenster is on a distinguished road
Quote:
Originally Posted by 325eXTATIC
you want to maximize all the links in the chain so to speak... Spark Plugs, Wires, Cap, Rotor, Throttle Cable, Air Filter, CLEAN YOUR INJECTORS!!! And as the Turtl3 mentioned... Could be your clutch starting to slip.

Just a few ideas!

Josh W.
Yeah,

I got into some compound problems with my M40 316i. Lot's of different small fixes are now bringing the car back to life.
Vacuum leaks, electrical current leaks, and dirty engine insides can do that.
If you're lucky it 'll be an easy and cheap fix, but you'll have to post a little more info, like does it only happen in gear? Does the weather influence this? Does engine temperature influence this?, etc. I started from knowing absolutely nothing about cars four months ago...
Morgenster is offline   Reply With Quote
Old 12-01-2005, 09:29 PM   #5 (permalink)
4th Gear Member
 
WardJ's Avatar
 
Join Date: Nov 2005
Location: Seacoast, NH
Car:
Posts: 842
Photos:
WardJ is on a distinguished road
Send a message via AIM to WardJ Send a message via MSN to WardJ Send a message via Yahoo to WardJ
yeah i'm just reiterating what they said

could be:
spark plugs fouled
fuel injector malfunctioning
fuel filter clogged
ignition timing could be off
or worse, intake manifold air leak
__________________
'85 325e
'Arrest Me Red'
mods to come:
Window Tint
New Badges - Check!
Muffler - Check! - Ansa free flow
New Radio
Sport Shocks - Bilstein
Keyless Entry + Alarm - BMW Security Systems
Power Flow Intake


THE founding member of "i don't hate on del"
WardJ is offline   Reply With Quote
Old 12-02-2005, 05:01 PM   #6 (permalink)
n00b
 
dagli's Avatar
 
Join Date: Nov 2005
Location: Missouri
Car:
Posts: 15
Photos:
dagli is on a distinguished road
Well, I Techroned the engine the first time I filled up when I got the car. As far as spark plugs go I havn't really tinkered with them all that much. As of lately I've just been detailing the paint/plastic off it.

Going into detail about the problem: it happens in all gears and is particularly more troublesome when it's cold out. I've been watching the tach closely while driving and I noticed that as I shift the RPM goes down, and fluctuates as I step on the gas. A half a second or so later, it picks up all of a sudden to a slightly higher RPM and drives normally. Since it's got down to the 20s here in Missouri, every now and then I smell exhaust/gas in the cabin.

In addition to checking the spark plugs and changing the air filter, and all that regular maintenance I think it may be something to do with the fuel lines. Is it an easy job to tighten the fuel line rings myself, or should I have one of my friend's dad's BMW mechanic guy who's worked on their various BMW's do it? Really, its a question of DIY or have someone who knows what he's doing do it.
dagli is offline   Reply With Quote
Old 12-03-2005, 03:31 AM   #7 (permalink)
n00b
 
Morgenster's Avatar
 
Join Date: Sep 2005
Location: Antwerp, Belgium
Car:
Posts: 29
Photos:
Morgenster is on a distinguished road
Here's a few pointers to make it easier for you or a mechanic to pinpoint the problem:
-Let the car idle cold and hot to see how it does this and if there's any difference. listen to and feel the engine. Does the tach needle go up and down and if so, how much? Does the engine stumble or stutter? Also, step out of the car and listen to your engine out there or look under the hood.
-Hold the throttle steady in neutral and see if the tach stays at the same RPM. (also when the engine is hot or cold)
-Check your spark plug wires on both ends for corrosion. Mine were just plain dirty and caused a drop in power by almost 30%. Especially in cold damp weather.
If cold weather makes things worse I'd think it'll either be an electrical or vacuum problem.
The exhaust gas smell is a major alarmbell, though. I'm not sure if anyone here ever experienced this as normal, but I think it's a safety hazard.
If you do some checks yourself it'll be easier to tell a mechanic what's wrong with the car. It often cuts labour-time bills in half and makes the fix much more accurate.
Morgenster is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E21, E30)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
318 ci need to increase initial acceleration DaveCotter 3-Series (E46, E90) 26 12-14-2005 03:16 PM
1995 E34 540i Poor Acceleration Cambridge 5-Series (E12,E28, E34, E39, E60) 1 03-29-2005 12:16 PM
Diagnosis Software For E36 ayrtons27 3-Series (E36) 0 12-11-2004 07:21 PM
Acceleration problem for 328i ??? mstar 3-Series (E36) 10 05-19-2004 10:27 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 05:24 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.