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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 06-03-2011, 08:15 AM   #1
John323i99
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Join Date: Aug 2008
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Engine has no response to gas pedal.

My vehicle a 1999 323I with 171K miles was operating normally when the engine suddenly was not responsive to the gas pedal. I pulled off the road and found no visible signs of problems, fluid leaks and no engine lights came on. I was able to limp home in first gear and park garage for further inspection after work. The vehicle runs smooth at idle, but will not go above idle RPM's.... approximately 600 RPM. I am looking for help to identify and common components or sensors that will cause this problem.. Also any tips on troubleshooting. I have the ODBII and BMW code reader for a 1999 but haven't scanned for any codes yet.
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Old 06-03-2011, 08:24 AM   #2
Theblackpearlmate
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See if you can blip the throttle manually at the throttle body itself. If it doesnt move (feels jammed) dont force it.
The vane inside can stick when dirty. Remove the throttle body, free it with a light tap and clean off any dirt residue.
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Old 06-03-2011, 08:37 AM   #3
John323i99
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Car died while cruising at about 45MPH. Throttle body may be dirty but unlikely, I keep a clean car / engine by running a bottle Seafoam twice a year.
I will be looking at all linkage from pedal to throttle body this evening.
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Old 06-03-2011, 12:58 PM   #4
g6
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surprised nobody has piped in - your throttle cable snapped most likely. 323s have a throttle cable.
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Old 06-03-2011, 01:07 PM   #5
Andy2108
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Originally Posted by g6 View Post
surprised nobody has piped in - your throttle cable snapped most likely. 323s have a throttle cable.
this
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Old 06-03-2011, 01:07 PM   #6
lvlikeWho
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^^what he said throttle cable


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Old 06-03-2011, 04:41 PM   #7
TheKingSim0n
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Believe it or not check your MAF (Mass Air-Flow Sensor) connection. Happened to my friends 328i where his connection was loose for his mass air flow sensor and the bimmer had NO reaction to the gas pedal.

good luck!
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Old 06-03-2011, 09:12 PM   #8
John323i99
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OK, I found out why there is no trottle response above ilde. The accelerator cable separated from the throttle body assembly. To reinstall the cable I removed the lower intake boot... not an easy job. After reinstalling the accelerator cable on the throttle body I proceeded to reinstall the mass air sensor. The problem is that the cable kept coming offf the throttle body. I pulled the throttle body to inspect why the cable will not stay secure. What happened, the throttle body has a piece of plastic broken off which secures the accelerator cable. There are 5 or 6 torq screws which secure the spring assembly to the center shaft of teh throttle body. I need to either replace the spring return assembly on the throttle body or replace the whole throttle body. My 323i won't be going anywhere for awhile.
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Old 06-03-2011, 09:21 PM   #9
Rob1990r
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Quote:
Originally Posted by John323i99 View Post
Car died while cruising at about 45MPH. Throttle body may be dirty but unlikely, I keep a clean car / engine by running a bottle Seafoam twice a year.
I will be looking at all linkage from pedal to throttle body this evening.
mine use to do the same thing it could just cut off at when i was at a cruising speed or slowing down it was my cam position sensors
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