what happens with disconnected TPS
#1
Registered User
Thread Starter
Join Date: Jan 2007
Location: In my drivers seat
Posts: 253
Likes: 0
Received 0 Likes
on
0 Posts
what happens with disconnected TPS
Simple question, What happens if the TPS is not hooked up? How will the engine run? More specifically, engine started running like crap, felt like it was missing and had very little power. And it will die at idle. Even going 65 with and warmed up, if I put in neutral and let off the gas it dies. Help, thanks.
#6
Registered User
So, with the understanding that I'm in a 3rd gen with a 3.4L, mine idled and ran "okay' up to about 2000RPM. Under load it had no power, and no throttle response above that 2k mark.
Last edited by midiwall; 01-26-2007 at 12:19 PM.
#7
Registered User
Join Date: Dec 2005
Location: central CA
Posts: 81
Likes: 0
Received 0 Likes
on
0 Posts
if your tps was disconnected you would get a CEL. Have you checked for CEL codes lately? Have you checked the air tube between the AFM and the throttle body for leaks?
Trending Topics
#8
Registered User
Thread Starter
Join Date: Jan 2007
Location: In my drivers seat
Posts: 253
Likes: 0
Received 0 Likes
on
0 Posts
I havent checked for codes because the light doesent come on. Should I try to pull them anyway? Im looking really hard to try to find some air leak because that is what it feels like.
You mentioned fluids, would a low fluid level cause this kind of problem (stumbling during acceleration, loss of power).
You mentioned fluids, would a low fluid level cause this kind of problem (stumbling during acceleration, loss of power).
#10
Registered User
Thread Starter
Join Date: Jan 2007
Location: In my drivers seat
Posts: 253
Likes: 0
Received 0 Likes
on
0 Posts
If that is the only test to see if it works, then yeah the light does come on for a few seconds. Any thoughts would be great cause iv been at it for days.
#13
Contributing Member
Join Date: May 2006
Location: Morgan Hill, Ca
Posts: 1,066
Likes: 0
Received 0 Likes
on
0 Posts
Simple question, What happens if the TPS is not hooked up? How will the engine run? More specifically, engine started running like crap, felt like it was missing and had very little power. And it will die at idle. Even going 65 with and warmed up, if I put in neutral and let off the gas it dies. Help, thanks.
If the TPS is not adjusted correctly as evidenced by a 500rpm idle, and hesitation with initial acceleration, unplugging the TPS connector should then cause a correct idle, and a normal acceleration.
Correcting the TPS then produced a correct idle, and no code.
Granted that is based on my experience, and the experience of several others with whom I've had exchanges.
Apparently others have had different experiences.
Be nice to have more data.
#14
I disconnected mine for a day once in a misguided troubleshooting attempt. It ran as well without it, but caveat here is that I already had a CEL for the knock sensor. Anyways - my 1990 3vze ran OK without the tps connected - however I suspect that it was already running in "failsafe mode"
#15
Contributing Member
Join Date: May 2006
Location: Morgan Hill, Ca
Posts: 1,066
Likes: 0
Received 0 Likes
on
0 Posts
I disconnected mine for a day once in a misguided troubleshooting attempt. It ran as well without it, but caveat here is that I already had a CEL for the knock sensor. Anyways - my 1990 3vze ran OK without the tps connected - however I suspect that it was already running in "failsafe mode"
I would think "fail safe" mode would be pretty miserable performance, although I couldn't find enough information on it to know one way or another. Neither for 2nd generation, or in general.
#16
You're right - my truck was already running poorly - but ran no worse after the tps disconnect. I already had a code 52 which apparently retards the timing to a safe value to prevent pinging. I've probably used the term "failsafe" incorrectly here - should of been more specific.
#17
Contributing Member
Join Date: May 2006
Location: Morgan Hill, Ca
Posts: 1,066
Likes: 0
Received 0 Likes
on
0 Posts
You're right - my truck was already running poorly - but ran no worse after the tps disconnect. I already had a code 52 which apparently retards the timing to a safe value to prevent pinging. I've probably used the term "failsafe" incorrectly here - should of been more specific.
#18
Tps
ok my toy started dieing randumly but start right back up, replaced mass air sensor and tps the tps made it high low ideal and bogg. Unpluged it runs good has good power is it fine to run with it unplugged
Thread
Thread Starter
Forum
Replies
Last Post