Hesitation in acceleration - BMW Forum - BimmerWerkz.com
BMW Forum BMW Forum

Auto Insurance

» Featured Product
Wheel & Tire Center

Go Back   BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 1,6,7,8 - Series and Mini Cooper
Register Home Forum Active Topics Gallery / Showroom Auto Loans Garage Search Today's Posts Mark Forums Read Auto EscrowInsurance

1,6,7,8 - Series and Mini Cooper General Chat related to models that do not fit into particular categories above. Please try to put your discussion in more appropriate sections. This section does cover the 1 Series, MINI Cooper and 8-Series vehicles: BMW 830i, BMW 840Ci, BMW 850i, BMW 850Ci, BMW 850CSi, M8, Alpina B12, BMW CS Concept and others.

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 02-04-2009, 11:07 PM   #1 (permalink)
n00b
 
Join Date: Feb 2009
Car:
Posts: 2
Photos:
onitsway is on a distinguished road
Hesitation in acceleration

Hello all. Just joined the site. I bought a 1995 740iL and love it. It is a project car and I can't wait to get started. I have a problem with cold starts and acceleration. I have replaced:

MAF
cleaned the ICV
changed the plugs and coils
changed both O2 sensors
changed the fuel filter

I start the car in the morning and after it warms up it idles fine. As soon as I put it in gear, it hesitates even if I floor it like it lost power then it kicks in and goes. I never have that instant throttle response like I think I should. I appreciate any help.
onitsway is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-04-2009, 11:38 PM   #2 (permalink)
OMFG another one!?
 
witeshark's Avatar
 
Join Date: Aug 2004
Location: Miami FL
Car: 89 E30 325i, 2007 Honda
Posts: 14,690
Photos:
witeshark is just really nicewiteshark is just really nicewiteshark is just really nicewiteshark is just really nicewiteshark is just really nice
How does the 4.0 run during a longer drive? Is it very cold where you are?
__________________
BMW

Sig by zeaq
witeshark is offline   Reply With Quote
Old 02-04-2009, 11:44 PM   #3 (permalink)
n00b
 
Join Date: Feb 2009
Car:
Posts: 2
Photos:
onitsway is on a distinguished road
It is cold. During long drives it is fine under slow acceleration. As soon as I step on the gas for a pass it bogs down than kicks in and goes. Also, if I drive normal and park somewhere with the engine running--5 mins later I put it in drive to go and get the same sputter like its flooded or something--then it kicks in and drives normal.
onitsway is offline   Reply With Quote
Old 02-19-2009, 07:22 PM   #4 (permalink)
n00b
 
Join Date: Jan 2009
Car:
Posts: 8
Photos:
Acaminero is on a distinguished road
I have the same type of problem with my 323i 1999...it starts like it shoild and once I drive for a while and park it for 5 minutes it will start right off and when put in drive it will shut off, it also has a very slow response when I take off , it slowly pick up speed ...and it runs nice .. but it doesnt respond as it should...I just got the car
and would like some help in ttrying to solve this...thanks
Acaminero is offline   Reply With Quote
Old 02-23-2009, 04:30 PM   #5 (permalink)
n00b
 
Join Date: Nov 2008
Car:
Posts: 6
Photos:
Alandi is on a distinguished road
This sounds like a fuel system problem. What grade gas are you using? Does it seem to burn gas rather quickly? May need to change the ICV. Even if the CEL isn't on you may want to get an OBD done.
Also by chance do you smell fuel at anytime when the car is operating or even when parked. I had this same problem with Millenia S Type (Millercycle engine) I had. Drove fine until I tried to punch it. Came to find out there was a leak in the fuel line.
Alandi is offline   Reply With Quote
Old 02-26-2009, 06:12 AM   #6 (permalink)
Help from over the pond
 
marti5's Avatar
 
Join Date: Sep 2008
Location: IPSWICH. U.K.
Car: E38 1997 728i Individual
Posts: 3,242
Photos:
marti5 is on a distinguished road
I would have a look around the spark plugs, OIL ????? or your PCV valve is shot.
__________________
VELVET BLUE UK INDIVIDUAL , IM THE LAST
UNITED WE STAND DIVIDED WE FALL

I stepped in a plate of Pasta the other day - now I have to worry about my Carbonara footprint!
marti5 is offline   Reply With Quote
Old 03-08-2009, 04:00 PM   #7 (permalink)
n00b
 
Join Date: Jan 2009
Car:
Posts: 8
Photos:
Acaminero is on a distinguished road
I looked at spark plugs, change gas pump, new air filter, no gas line leak problem..it runs nice and when cold I get no hesitation on my 1999 323i...there is no leak on vacumm hose...do not know if there is a pcv valve, or if hesitation could be on presure gas regulator... it start hesitating about 15 or 20 minutes after started....need more leads to look for ..thanks
Acaminero is offline   Reply With Quote
Old 03-12-2009, 12:42 PM   #8 (permalink)
n00b
 
BMW_V8's Avatar
 
Join Date: Mar 2009
Location: eugene oregon
Car: 1994 740i (E32)
Posts: 22
Photos:
BMW_V8 is on a distinguished road
by the way u replaced all the coils? the local bmw shop quoted me around 100 per coild thats 800 dollars lol u must have a thick wallet lol
__________________
PROUD BMW OWNER
BMW_V8 is offline   Reply With Quote
Old 03-12-2009, 07:15 PM   #9 (permalink)
n00b
 
Join Date: Jan 2009
Car:
Posts: 8
Photos:
Acaminero is on a distinguished road
NO, I do'not think that is a place to look for..since it runs nice on cold and it jhust get lazy on hot..its got to be around fuel delivery..

thanks
Acaminero is offline   Reply With Quote
Old 03-13-2009, 07:49 AM   #10 (permalink)
Neutral Member
 
nnamdi's Avatar
 
Join Date: Oct 2008
Car:
Posts: 57
Photos:
nnamdi is on a distinguished road
Sounding more and more like a fuel line problem. A nozzle or two may not be happy. water in the fuel tank, dirt in the injector rails. That solved it on my 318, changed 2 nozzles and cleaned out the rail.
nnamdi is offline   Reply With Quote
Old 07-05-2009, 11:48 PM   #11 (permalink)
n00b
 
Join Date: Jul 2009
Car:
Posts: 3
Photos:
omarhr is on a distinguished road
323i hesitates in hot weather

I own a 1999 323i as well; I also had the same problem. I took in the car to a BMW dealership about five times for this problem; two times they kept the car for more than a week. They never found a problem with it, but I know that there was one. just a couple of weeks ago I took the car to a garage where the mechanic had asked me to bring the car when this was happening, after he connected the snop on computer he also was unable to get a code for the problem. It was very hot that day and we noticed that when the car was running the fan would go on and it blows a lot of hot air towards the sides and the back of the engine. I noticed that there was a big peace of plastic missing on the housing of the air filter intake this is the peace between the radiator support and cover of the air filter box. We put some silver tape around this part to cover the hole and it seems like that did it. The car is running a lot better I noticed a big improvement and as the days go by the car seems to be running a lot better. I knew it had something to do with the temperature. Since the car was horrible to drive in hot weather. I called the dealer, the part is going to cost me $28.00 that way I will remove the old one with the tape on it. Check that part in your car it seems like the hot air just burns it and as soon as you touch it, it breaks. The part is L shaped.
omarhr is offline   Reply With Quote
Old 07-05-2009, 11:51 PM   #12 (permalink)
OMFG another one!?
 
witeshark's Avatar
 
Join Date: Aug 2004
Location: Miami FL
Car: 89 E30 325i, 2007 Honda
Posts: 14,690
Photos:
witeshark is just really nicewiteshark is just really nicewiteshark is just really nicewiteshark is just really nicewiteshark is just really nice
Thanks omarhr for sharing that. This will help anyone with similar issues!
__________________
BMW

Sig by zeaq
witeshark is offline   Reply With Quote
Old 07-06-2009, 01:18 AM   #13 (permalink)
W00T
 
Numark318i's Avatar
 
Join Date: May 2004
Location: Rohnert Park, CA
Car: 1991 E30 318i 2008 E92 328i
Posts: 2,714
Photos:
Numark318i has a reputation beyond reputeNumark318i has a reputation beyond reputeNumark318i has a reputation beyond reputeNumark318i has a reputation beyond reputeNumark318i has a reputation beyond reputeNumark318i has a reputation beyond reputeNumark318i has a reputation beyond reputeNumark318i has a reputation beyond reputeNumark318i has a reputation beyond reputeNumark318i has a reputation beyond reputeNumark318i has a reputation beyond repute
Send a message via AIM to Numark318i
maybe PCV valve?

Does the car tick?
__________________
Numark318i is offline   Reply With Quote
Old 07-06-2009, 05:27 PM   #14 (permalink)
n00b
 
Join Date: Jan 2009
Car:
Posts: 8
Photos:
Acaminero is on a distinguished road
hesitation problem solved on my 323i

I Like to give my feeback on to you all with the same type of problem,
I had done all the mentioned possible causes, ended up replacing the camshaft sensor and finally got the car running perfect , more power and no hesitation at all, replacing the sensor was a 15 minutes diy job, and got the sensor for less than 100 dollars. just have to have the right tools. if you need instructions let me know.
it is recommended to change both sensor, but I believe otherwise, since camshat sensor is the one that causes the hesitation, the other is a CO2, and may not be damaged, so I took the chance.

thanks
Quote:
Originally Posted by onitsway View Post
Hello all. Just joined the site. I bought a 1995 740iL and love it. It is a project car and I can't wait to get started. I have a problem with cold starts and acceleration. I have replaced:

MAF
cleaned the ICV
changed the plugs and coils
changed both O2 sensors
changed the fuel filter

I start the car in the morning and after it warms up it idles fine. As soon as I put it in gear, it hesitates even if I floor it like it lost power then it kicks in and goes. I never have that instant throttle response like I think I should. I appreciate any help.
Acaminero is offline   Reply With Quote
Old 07-08-2009, 04:53 PM   #15 (permalink)
n00b
 
Join Date: Jul 2009
Car:
Posts: 3
Photos:
omarhr is on a distinguished road
question for Acaminero

Hi Acamireo I went to the BMW dealership to buy the camshaft sensor for my 1999 323i but they are telling me that there is 2 sensors in the camshaft one is an intake sensor and the otherone is an exhaust sensor can you please tell me which one is the one you replaced.
omarhr is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 1,6,7,8 - Series and Mini Cooper


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
Still have a hesitation NEED HELP seven 3-Series (E36) 4 06-10-2007 09:09 AM
Engine hesitation 325i_family 3-Series (E36) 12 10-28-2005 04:22 PM
Hesitation 85bmw535i 5-Series (E12,E28, E34, E39, E60) 7 10-19-2004 06:14 PM
94' 325is hesitation tyq94325is 3-Series (E36) 3 09-12-2004 11:37 AM
94' 325is hesitation tyq94325is 3-Series (E36) 8 08-21-2004 07:34 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 11:03 PM.



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.