My accelerator pedal doesn't work !!!

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DeanP66

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My 2000 Trans Am has been sitting idle for a couple of months and everything was fine. After charging the battery, I started it with no problem, but I can't get it to rev at all, whether I'm in gear or not. Gas pedal doesn't respond at all.

If I put it in gear, it drives at idle speeds only. If I manually turn the throttle under the hood by hand, the engine revs just fine.
The pedal is not opening the throttle.

Any ideas???
 
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did you check for a broken or disconnected cable?
 
I don't think it's the cable. The gas pedal is still stiff just like before. Could it be some type of sensor that's gone bad.

One other thing, I opened up the fuse boxes and checked to see if any were blown, but didn't find any.
 
you dont have somebody who can sit in the car and step on the gas peddle while you watch if the throttle body connection moves?
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The throttle definitely doesn't move when I press the gas pedal. However, the gas pedal cable doesn't go straight to the throttle body. It first goes to some type of pulley that's sitting on some kind of solenoid, I believe, and from there it goes back to the throttle body.

Does anybody have any idea what that part is called?

I've attached a picture of it with the plastic cover off. It's to the left of the battery in the picture with the cover sitting to the right of the battery.
 

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Thanks for the diagram. Now let's see if I can solve this thing.

So, I tried pressing the gas again and I noticed the pulley moving which would seem to indicate that cable #1 is moving as well since it's connected to the pulley.

However, cable #23 doesn't seem to be moving. I've checked and the connector is firmly in place in the lower part of the pulley wheel.

There's also a 3rd cable that comes from the same general area as cable #1 and also goes to the pulley assembly. I didn't see anything like that in the diagram. Any ideas what that is?
 
What exactly is under that rubber boot on cable #23 that is half way between the pulley and the throttle?
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part #23 is only serviced as a complete assembly, the boot appears to be part of the cable
the third cable is probably for cruise control
when cable 1 turns the pulley, does the section of the pulley where 23 is connected also turn?
if you disconnect cable 23 on either end and pull it does it appear to be broken internally?
 
When cable #1 turns the pulley, the lower section with #23 does NOT turn at all.

If I hold cable #23 near the pulley and pull on the other end just after the boot, the throttle gets tension and opens up. It appears that there is some kind of spring inside the boot with a rubber seal of some type. I'm not really sure how it works.

One other thought, if you look at the pulley there is a power connector that runs to the solenoid below it. What does that thing need power for? Could that be my problem? How do I test that unit? With a multimeter?

Here's a picture.
 

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So, I tried testing the pulley's power connector and the electrical connector that it attaches to. When I checked the electrical connector, I got around
10.9 Volts with the key in the ON position. I put the multimeter's black cable on my negative battery terminal and the red cable on the connector and got my reading. Hope I did it right.

Then I plugged the connector back into the pulley's plug and stuck a paper clip down the back until it made contact. Did the same measurement and I only got 5.5 Volts.

Again, I'm not sure what this means or even if I did the test right. Maybe I should have opened the throttle by hand as I did the second test and looked for variances in the voltage as I increased and decreased the throttle?
 
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there is barely a mention of the pulley on the internet. One site I found had same issue as you and they manually turned the part of the pulley with the second cable on it which then for some reason resolved the issue. I can not find any testing procedures, you need a shop manual of some kind, factory, hanes, chilton. The pulley assembly is discontinued from GM so if you have to replace it would have to come from a salvage yard.
http://ls1tech.com/forums/generatio...61075-no-acceleration-even-pedal-floored.html
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I have found very little info as well. I paid for a daily subscription to a service manual site but, you guessed it, there's no mention of that part at all.

Does the lower voltage coming from the pulley assembly (5.5V) compared to the voltage coming from the electrical connector (10.9V) seem to indicate a bad part in your opinion?

It looks like I may have to go to the junk yard.
 
when dealing with systems that use computer control having less than 12 volts in circuits is not unusual. I wish I could find a better answer for you. There are paid sites on the internet where you can get technicians with access to GM test procedures. You also may find a cooperative GM dealer willing to share the test procedure.
http://www.justanswer.com/sip/ponti...e&pmt=b&plc=&gclid=CMfk2_KxzMYCFZU2aQodaDUA2g
 
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