What will a bad tps do? - Third Generation F-Body Message Boards


Carburetors Carb discussion and questions. Upgrading your Third Gen's carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.

What will a bad tps do?

Reply
 
Thread Tools Search this Thread
Old 07-28-2008, 08:18 AM   #1
Member
Thread Starter
 
Join Date: Nov 2007
Location: Holland, MI
Posts: 276
What will a bad tps do?

I'm getting the 21 or 24 code, but the car runs ok. This is on an E4ME carb. I'm getting both codes but one is becuase my speedo isn't working.
I don't really want to replace the the TPS, I'm just wondering what kind of damage or problems this sensor malfunctioning is going to cause me.

Last edited by RazorN8; 07-28-2008 at 02:18 PM.
RazorN8 is offline   Reply With Quote
Old 07-31-2008, 12:53 PM   #2
Senior Member
iTrader: (3)
 
eightTfourTA's Avatar
 
Join Date: Mar 2001
Location: Deltona, FL
Posts: 505
Re: What will a bad tps do?

Mine was reading 5volts all the time when it went bad, had an off-idle bogging problem, and the torque converter locked up too soon. Bad gas mileage also. Not sure if it'll damage anything because I took care of it in short order, but sometimes if your mixture is too rich you'll smell fuel in the crankcase, which is never good for the internals.
eightTfourTA is offline   Reply With Quote
Old 08-02-2008, 07:32 AM   #3
Member
 
Join Date: Jul 2008
Location: NC USA
Posts: 144
Re: What will a bad tps do?

when i first bought my car i also got those codes. the issue i had is that the car was extremely slow to respond, very little power in the low rpm range, and no 0 to anything power. it was this way for almost five months and i never saw any change in the performance for better or worse, after changing the tps i immediately received what seemed like an insane amount of power. the car had horrible gas milage as well during the bad tps months. i would reccomend changing it if possible i think i picked one up at auto zone for fifty bucks.
dvardaman85 is offline   Reply With Quote
Old 08-02-2008, 08:46 AM   #4
Junior Member
 
Join Date: May 2007
Posts: 73
Re: What will a bad tps do?

The TPS is not that hard to check. I don't have the actual specs, but I can get them. With a volt meter you just look for a smooth resistance change as the TPS turns. If you find any dead spots or sudden spikes, its bad. I can get you more info if you want it. If its bad you will get syptoms like dvardaman85 described or you might find a bad spot at a particular speed. Car runs rough only at a particular point in acceleration.
dstss is offline   Reply With Quote
Old 07-16-2009, 07:57 PM   #5
Member
iTrader: (1)
 
Join Date: Jan 2005
Posts: 290
Re: What will a bad tps do?

I have a similar issue. My TPS is 1.58v at idle and goes up to 4.2v. The car has no low end power, even after head and cam change. I guess I swap the TPS, but do not have any codes.

Did you replace the airhorn gasket when you did it? Or is all you need the new sensor and just reuse everything else?
tommy z-28 is offline   Reply With Quote
Old 07-16-2009, 10:25 PM   #6
Supreme Member
iTrader: (5)
 
one92rs's Avatar
 
Join Date: Jan 2009
Location: league city
Posts: 2,928
Re: What will a bad tps do?

the specs are in the tech section. a bad tps sensor can cause boggong and erratic throttle. it needs to be a smoooth resistance from close to fully open. and there is a max and min reading.
one92rs is offline   Reply With Quote
Old 07-17-2009, 03:24 PM   #7
Moderator
iTrader: (14)
 
five7kid's Avatar
 
Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 43,110
Quote:
Originally Posted by dstss View Post
The TPS is not that hard to check. ... With a volt meter you just look for a smooth resistance change as the TPS turns.
Not to nit-pick, but the carb TPS is a plunger built into the carb.

If you said, "...smooth resistance change as the throttle is turned," that would be a little more accurate.

Personally, I've never had one go bad, so I don't know what would happen. I was fooling around once and disconnected it to see what wouldn't work, and as I recall all that happened was the SES light came on. Seemed to run fine, even the cruise control and TCC lock-up worked, but it wasn't an extensive "test".
five7kid is offline   Reply With Quote
Old 07-29-2009, 07:26 AM   #8
Member
iTrader: (1)
 
Join Date: Jan 2005
Posts: 290
Re: What will a bad tps do?

Well I finally located an airhorn gasket for $4 off a carb builder (Avanti--who are great!). I installed the new TPS late last night. One question: was i supposed to do something iwth the adjusting screw during re-installation of the airhorn? Everything fit back together and the little piston is on top of the plunger. Im just concerned that I didnt do something right with the adjusting screw. Very anxious to get this thing back on the car and see if this made a difference!
tommy z-28 is offline   Reply With Quote
Old 07-29-2009, 08:08 AM   #9
Member
 
Join Date: Jul 2008
Location: NC USA
Posts: 144
Re: What will a bad tps do?

when i replaced my tps i just replaced the tps assembly and thats all no gaskets no extra hardware. you factory q-jet should have adjustments already performed on it if you have made adjustments in the past then it is possible that you may need to tune it a bit but just with reinstalling the new tps (if that was in fact the problem) you should be able to see a world of difference. have you gotten the car back up and runnign again
dvardaman85 is offline   Reply With Quote
Old 07-29-2009, 08:15 AM   #10
Member
iTrader: (1)
 
Join Date: Jan 2005
Posts: 290
Re: What will a bad tps do?

No I have not. I am also trying to get information on re-sealing the well plugs. They may be leaking, or at least they have gas on them...

I need to figure out where exactly to spread the JB weld (I guess Im kinda dumb when it comes to Qjets.)
tommy z-28 is offline   Reply With Quote
Old 07-29-2009, 08:33 PM   #11
Member
iTrader: (1)
 
Join Date: Jan 2005
Posts: 290
Re: What will a bad tps do?

Started the car up with after reinstalling and calibrating the new TPS (.54 at idle and 4.2v WOT). Now the car will not rev smoothly. It stumbles between 1500 and 3000 rpms. The car cannot be driven, as it will stall with ANY amount of throttle over idle when in drive!!!! I swear I am going to lose it with this thing (cash for clunkers time???) Could this be the leaking well plugs, and the former TPS sensor at idle had 1.58v compensating for it?
tommy z-28 is offline   Reply With Quote
Old 07-29-2009, 11:17 PM   #12
Moderator
iTrader: (14)
 
five7kid's Avatar
 
Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 43,110
Quote:
Originally Posted by tommy z-28 View Post
(cash for clunkers time???)
Sorry, doesn't qualify.
five7kid is offline   Reply With Quote
Old 07-30-2009, 07:19 AM   #13
Member
iTrader: (1)
 
Join Date: Jan 2005
Posts: 290
Re: What will a bad tps do?

Why doesnt it qualify? It is rated at 17 mpg blended on the gov's site?

Anyways, I really need to figure out this lean condition off idle that is causing it to stall.

Someone told me to adjust the TPS one turn counter clockwise and see if it corrects the condition (disregarding the voltage settings suggested in the manual).
tommy z-28 is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
persistent 305tbi issue, please help! 92firebirdguy TBI 59 09-01-2016 07:53 AM
Please check my MAF diagnosis ... 1987 L98 code 33 /34 BumpaD82 Tech / General Engine 37 02-26-2016 02:57 PM
Engine light keeps coming on!!! 3rdgenkindagal Tech / General Engine 15 09-13-2015 02:02 PM
PLEASE HELP! diagnose my 89 GTA earlpote TPI 9 09-12-2015 11:55 AM
Problems with -86 305 TPI firebird, stalls when pressing gas, code 34. MikkoV TPI 2 09-09-2015 04:25 PM


Go Back   Third Generation F-Body Message Boards >

Tags
bad, camaros, car, carburetor, caus, change, chevy, e4me, gas, gen, mileage, rough, runs, sensor, stall, symptoms, tps

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are Off
Refbacks are Off


Advertising
Featured Sponsors
Vendor Directory

1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 04:09 AM.


All content copyright © 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: