LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

takes more throttle than it should.

Old Feb 21, 2009 | 08:14 PM
  #1  
mrmint69's Avatar
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From: Post Falls, Idaho
takes more throttle than it should.

Just got the car on the road after a long winter and tons of snow. I noticed that when I accelerate the gas pedal has to be pushed pretty far before you notice any real rise in rpm's. Is there something like the throttle cable that needs adjusting of what should I look for? If I give it over 1/2 throttle its fine but it feels like I have to mash the throttle to get it to wake up and then it screams.
Old Feb 21, 2009 | 10:16 PM
  #2  
z28camaro1090's Avatar
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From: wilmington de
mine does that same thing.. and it seems dead inbetween 1500 and 2000 rpms .. most people tell me its the opti spark going bad.
Old Feb 22, 2009 | 02:41 AM
  #3  
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clogged cat? does the exhaust ever smell like sulfur? could be opti related, could be TPS, any trouble codes?

Then again your torque converter lockup clutch does what you're describing.

So do you think the non-revving condition due to it being in gear with the TCC locked, (and it'll rev fine in neutral or when it downshifts), or is it due to a problem like a clogged cat, or something electrical? ...more info.
Old Feb 22, 2009 | 12:47 PM
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My guess is maybe the TPS. How do you check it? The cat is pretty new and it does not have any issues to make me think its that. Can the throttle cable need adjusting and how do you do it.
Old Feb 22, 2009 | 08:12 PM
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The TPS has 3 wires: 5 volts, ground, and 0-5v sensor output.

Using a multimeter with the engine off and ignition on, measure the voltage between ground and the sensor output wires.
Ramp the throttle open verry slowly with your finger and see if the output voltage ramps smoothly and with linearity. If it glitches or has like a dead zone or something it's bad. It should swing from .55v to 4.55v or so.

I'm guessing it's fine though as this could cause all sorts of sputtering during driving.

As for the throttle cable adjustment, I would immagine there should only about 1/8" of slop or less, so that slight input from your foot cracks it open.

Last edited by MikeGyver; Feb 22, 2009 at 08:15 PM.
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