Advertise with ProbeTalk - click here to find out how!



Advertise with ProbeTalk - click here to find out how!
Advertise with ProbeTalk - click here to find out how!

ProbeTalk.com Forums

Go Back   ProbeTalk.com Forums > Tech Section > 2nd Gen (93-97) V6 2.5L

2nd Gen (93-97) V6 2.5L Discussion of Maint Issues for V6

Reply
 
Thread Tools
Old March 20th, 2017, 02:43 PM   #1
93lazerpgt
Slow Learner
 
Join Date: May 2016
Posts: 45
Tps?!?

So I had a thread about my idle issues. Well with a new pcv valve and grommet I think I have that mostly corrected. Now I have a new issue I replaced my TPS (throttle position sensor) do to bouncing RPMs with partial throttle. Now I still have the bouncing and when letting off the throttle below 2000 RPM I get a severe jerk.

Decided to unplug it for the rest of my drive today and both the jerking and bouncing is nearly gone. So at this point I wanted some input on whether I should try a third TPS or is the problem most likely in the wiring to the ECU ?

Side note the new TPS could not be set via the fan trick I did adjust it via volt meter to .60 volts
93lazerpgt is online now   Reply With Quote
Old March 20th, 2017, 04:02 PM   #2
LowClassCC
Fazda Tuning
 
LowClassCC's Avatar
 
Join Date: Apr 2007
Location: Mauckport, Indiana
Age: 41
Posts: 2,043
Every time I have had a bouncing idle it was the idle air controller. Sometimes the car just had an air bubble in the coolant system at the IAC. Burping the system and topping off the coolant fixed this. On a different PGT the IAC needed to be taken off and cleaned. It was sticking and causing the problem.

Since you were unable to set the tps using the fan trick I would return it and try another one and see how that does.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
LowClassCC is offline   Reply With Quote
Old March 20th, 2017, 04:02 PM   #3
J_Unit
Member
 
Join Date: Dec 2014
Location: IL
Posts: 172
My experience with bouncing idle has always been related to lack of coolant and the idle air control motor. I once solved a bouncing idle by replacing the whole throttle body assembly with the tps and the iac on it with one from the junkyard. Later down the line the issue came back because of coolant leaking from the water pump. Fixed that and have Been smooth sailing ever since. Hope this helps.
J_Unit is offline   Reply With Quote
Old March 21st, 2017, 04:48 AM   #4
Greg 94 PGT
Donating Member
 
Greg 94 PGT's Avatar
 
Join Date: Feb 2000
Location: Hollywood, FL. USA
Age: 41
Posts: 4,781
I agree, try properly filling and burping your coolant.
__________________
'94 Red PGT Gone, but Project PGT has begun
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

'04 Black SRT-4 Um, no it's not stock. But "It's just a Neon, right?"
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
379whp @ 20lbs *Sold*
Greg 94 PGT is offline   Reply With Quote
Old March 21st, 2017, 02:26 PM   #5
93lazerpgt
Slow Learner
 
Join Date: May 2016
Posts: 45
I should have been more specific at idle it's a steady 750ish only raises when the a/c clutch activates to about 1000. The RPM bouncing is only with slight throttle. It bounces between approximately 1100 and 1500. I'm just having a hard time understanding how both sensors have the same bouncing area. Above 1100 it won't do it.

I originally thought it could be a vacuum leak but it still be happening with the TPS unplugged.

Drove to work and home today with it unplugged with no issues other than obvious more fuel consumption and the CEL.
93lazerpgt is online now   Reply With Quote
Old March 22nd, 2017, 03:06 PM   #6
93lazerpgt
Slow Learner
 
Join Date: May 2016
Posts: 45
Tested the voltage at the TPS with it running and bouncing RPMs.. the voltage does not change. It goes up from the .60v I set it at to .65v during the bouncing. Increasing RPMs increases volts.

New thought...is it possible I have a small vacuum leak but unplugging the TPS and forcing the computer to work off its base line settings is some how hiding the symptoms?
93lazerpgt is online now   Reply With Quote
Old March 23rd, 2017, 02:35 PM   #7
J_Unit
Member
 
Join Date: Dec 2014
Location: IL
Posts: 172
Even given all the additional info, I still think the problem is coolant and iac related. I don't know the forensics on how those sensors communicate with each other exactly. But if it were me, and i knew the coolant was good, I'd be slapping another throttle body assembly on it off a car with less miles and see how it acts after that.
J_Unit is offline   Reply With Quote
Old March 23rd, 2017, 03:26 PM   #8
93lazerpgt
Slow Learner
 
Join Date: May 2016
Posts: 45
Quote:
Originally Posted by J_Unit View Post
Even given all the additional info, I still think the problem is coolant and iac related. I don't know the forensics on how those sensors communicate with each other exactly. But if it were me, and i knew the coolant was good, I'd be slapping another throttle body assembly on it off a car with less miles and see how it acts after that.
That would be a easy solution if it were easy to find a throttle body. I also tried creating a small vacuum leak to see if the idle would change. Nothing...not a hiccup stumble or anything. I have been chasing this problem for about 2 months. I have tried every normal fix except a different throttle body or pulling the intake to verify all the vacuum lines
93lazerpgt is online now   Reply With Quote
Old March 26th, 2017, 10:02 AM   #9
93lazerpgt
Slow Learner
 
Join Date: May 2016
Posts: 45
Spent most of the day yesterday replacing vacuum lines and testing sensors. IAC resistance was 11.5. Set the TPS via feeler gauges. Also cleaned the TB and IAC. I am confident I have checked basically every normal cause of this. JUnit suggested a new TB which I will hopefully be trying. There does seem to be a little slop in the throttle linkage but I don't have a known good TB to compare to.
93lazerpgt is online now   Reply With Quote
Old March 26th, 2017, 03:55 PM   #10
fordprobegt67
Supercharged Member
 
Join Date: Apr 2011
Location: Manchester, IN
Age: 31
Posts: 1,145
where are you located..
__________________
95 PGT Current project
95 PSE swapped in 93 KL...Headers.... K&N cold Air.... Gutted Caged and ready for Dirt
01 Seabring Convert 01 Neon Rims With Spacers..
99 Olds Cutlas DD
fordprobegt67 is offline   Reply With Quote
Old March 26th, 2017, 04:24 PM   #11
93lazerpgt
Slow Learner
 
Join Date: May 2016
Posts: 45
PMing you.
93lazerpgt is online now   Reply With Quote
Old March 27th, 2017, 03:37 PM   #12
93lazerpgt
Slow Learner
 
Join Date: May 2016
Posts: 45
I know beating a dead horse at this point. Decided to verify my VAF was moving and not sticking possibly causing the issue. Well during the bouncing the plunger actually goes in when the RPMS go down. This doesn't seem right to me. If it is please inform me of that.
__________________
93 PGT CAI, Egay headers, high flow cat. 2.5 mandrel bent with Borla, Yonaka coilovers,19mm rear bar,CM 12lb fly and stage 2 clutch

She tends to argue with me daily...yep it's a Probe
93lazerpgt is online now   Reply With Quote
Reply

Thread Tools

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 Off
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Will a bad O2 or TPS sensor take HP? probelife 2nd Gen (93-97) V6 2.5L 6 April 25th, 2001 01:03 PM
Exactly What Bearing Does the TPS have on the Trans Computer (ATX) ....might be long pgt4speed 2nd Gen (93-97) V6 2.5L 4 April 7th, 2001 01:39 PM
TPS sensor...check/adjustment GSweetZ 2nd Gen (93-97) I4 2.0L 3 April 7th, 2001 01:52 AM
TPS not working???? HELP!! Probe225 2nd Gen (93-97) V6 2.5L 2 April 5th, 2001 06:53 PM
TPS adjustment didn't help bucking Mike94PGT 2nd Gen (93-97) V6 2.5L 9 April 4th, 2001 05:59 AM


All times are GMT -7. The time now is 09:39 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ProbeTalk.com is not affiliated in any way with the Ford Motor Company, the Mazda Motor Corporation, or any subsidiaries of either company.
All views and opinions expressed on this message board are those of the author and not the owners of ProbeTalk.com.