Throttle response question / aftermarket TPS
Thread Starter
Team Owner
Joined: Oct 2000
Posts: 29,937
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St. Jude Donor '03-'04
Cruise-In 1-2-3-4-5 Veteran
Throttle response question / aftermarket TPS
My '93 LT1 coupe has a condition that I consider to be a minor annoyance. Is it just my car, or do all of the LT1s tend to run like this -
WOT acceleration from a roll - you go STOMP...and the engine goes (pause) WHAAAAAAA!
One more time...
STOMP (lub-dub, lub-) WHAAAAAAA!
Can I get this to be more of a stompWHAAAAA! without the noticeable second or second and a half between command and action? Or is this standard?
Does anyone have the in-line TPS signal booster that sends a WOT signal when the throttle hits 60% or more? Would it help this condition?
Just wondering...
~Matt
WOT acceleration from a roll - you go STOMP...and the engine goes (pause) WHAAAAAAA!
One more time...
STOMP (lub-dub, lub-) WHAAAAAAA!
Can I get this to be more of a stompWHAAAAA! without the noticeable second or second and a half between command and action? Or is this standard?
Does anyone have the in-line TPS signal booster that sends a WOT signal when the throttle hits 60% or more? Would it help this condition?
Just wondering...
~Matt
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Re: Throttle response question / aftermarket TPS (Matt Black)
My L98 has an adjustable TPS and I have it set to .65Vdc, the max before the ECM throws a code. When I hit the throttle on a roll the back end comes lose big time.
Your problem may not be the TPS but I think it might help. Maybe some guys with LT1s will come in with a better answer.
Your problem may not be the TPS but I think it might help. Maybe some guys with LT1s will come in with a better answer.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Re: Throttle response question / aftermarket TPS (65Z01)
What you're describing is similar to a bog with a carbed engine.
I cured mine the same way by raising the TPS voltage to .64. I settled on this after trying everything from .55 up. When I set it at .64 the problem was cured so I left it there.
Each engine combo is different though, so yours may need more or less. I know that some engines don't allow this TPS voltage adjustability, but I believe the aftermarket has a electrical plug-in deal that can be used to raise the voltage - don't know how well it works though.
Jake
I cured mine the same way by raising the TPS voltage to .64. I settled on this after trying everything from .55 up. When I set it at .64 the problem was cured so I left it there.
Each engine combo is different though, so yours may need more or less. I know that some engines don't allow this TPS voltage adjustability, but I believe the aftermarket has a electrical plug-in deal that can be used to raise the voltage - don't know how well it works though.
Jake
Thread Starter
Team Owner
Joined: Oct 2000
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St. Jude Donor '03-'04
Cruise-In 1-2-3-4-5 Veteran
Re: Throttle response question / aftermarket TPS (JAKE)
So...anyone know if the LT1's TPS is adjustable? Or if there's a decent aftermarket replacement that's adjustable?
Le Mans Master
Joined: Dec 1999
Posts: 8,540
Likes: 1
From: And on the fifth day, subpoenas were served to Obama senior staff
Re: Throttle response question / aftermarket TPS (Matt Black)
Matt, I'm not an LT1 guy but I don't think you need any aftermarket stuff here; you have a problem! All these sub 2 second 60' LT1's don't have this tip in problem.
Personally I would look for a failed TPS sensor or vacuum leak. Perhaps the egr is stuck slightly open from carbon buildup or any number of thinks could be wrong.
Best think would be to get a scanner on the car, fuel pressure guage and perhaps a vacuum guage and see what's going on.
It should pull when you hit the go pedal. You don't need aftermarket parts, you need to find out whats broken. :yesnod:
Good Luck, you will find it.
Pete
Personally I would look for a failed TPS sensor or vacuum leak. Perhaps the egr is stuck slightly open from carbon buildup or any number of thinks could be wrong.
Best think would be to get a scanner on the car, fuel pressure guage and perhaps a vacuum guage and see what's going on.
It should pull when you hit the go pedal. You don't need aftermarket parts, you need to find out whats broken. :yesnod:
Good Luck, you will find it.
Pete
Original Founding Member!
Joined: Jul 1999
Posts: 9,037
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From: Granby, MA
Cruise-In 1, 3, 9. 10 & 11 Veteran
Re: Throttle response question / aftermarket TPS (65Z01)
65z01.....my L-98.....I would like to also check and adjust mine to .65....how do i do this?
pics would be great!....thanks
jeff
Jon M...is this what you were telling me about a little while ago too?
pics would be great!....thanks
jeff
Jon M...is this what you were telling me about a little while ago too?
Original Founding Member!
Joined: Jul 1999
Posts: 9,037
Likes: 88
From: Granby, MA
Cruise-In 1, 3, 9. 10 & 11 Veteran
Re: Throttle response question / aftermarket TPS (Yanni88)
yanni...what exactly did you do....i want to do this to mine.....is that voltage what it is at idle? and you just turn a screw on the tps?
thanks jeff
thanks jeff
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