Buick When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

High idle 2003 century

Thread Tools
 
Search this Thread
 
Old Aug 20, 2024 | 07:31 AM
  #11  
tglass1480's Avatar
Thread Starter
Junior Member
Posts like a Ricer Type-R
 
Joined: Aug 2024
Posts: 17
Likes: 17
tglass1480 is on a distinguished road
Default

Code is P0122. No Tach on the cluster itself, the tool shows no rpm with KOEO. I sprayed engine down with carb clean and no changes in rpm’*, I have another tps coming its a delphi which I think is more along the lines of oem. I pull the air box to get to the pcm to back probe all the wires for the tps and they all have good continuity. So it’* the circuit low code that is coming up. Numbers are in range as per manual. I’m stumped at the moment.
Reply
Old Aug 20, 2024 | 11:24 PM
  #12  
CathedralCub's Avatar
Senior Member


True Car Nut
 
Joined: Feb 2015
Posts: 6,809
Likes: 1,006
From: Earth
CathedralCub is a splendid one to beholdCathedralCub is a splendid one to beholdCathedralCub is a splendid one to beholdCathedralCub is a splendid one to beholdCathedralCub is a splendid one to beholdCathedralCub is a splendid one to beholdCathedralCub is a splendid one to behold
Default

Does it have the P0122 (or any other codes) stored currently?

Have you done a continuity check from the front side of the appropriate contacts (in the respective plugs) on each end of the wires for the TPS?
Reply
Old Aug 21, 2024 | 08:25 AM
  #13  
tglass1480's Avatar
Thread Starter
Junior Member
Posts like a Ricer Type-R
 
Joined: Aug 2024
Posts: 17
Likes: 17
tglass1480 is on a distinguished road
Default

No other stores codes, haven’t gotten a full drive cycle in since pulling the negative cable a few days ago, it the rpms are so high when I’m driving without my foot on the gas that I don’t really want to keep stressing it when I stop, it’* still trying to go. I checked continuity from the front side of the tps plug to the pcm, they all tested ok
Reply
Old Aug 21, 2024 | 02:01 PM
  #14  
carfixer007's Avatar
Senior Member


True Car Nut
 
Joined: Dec 2018
Posts: 3,239
Likes: 1,597
From: Flint, MI USA
carfixer007 is on a distinguished road
Default

What is the load pid at idle?
Reply
Old Aug 21, 2024 | 02:59 PM
  #15  
tglass1480's Avatar
Thread Starter
Junior Member
Posts like a Ricer Type-R
 
Joined: Aug 2024
Posts: 17
Likes: 17
tglass1480 is on a distinguished road
Default

The one picture shows 6.7 with it running higher idle, I’ve seen it as high as 7.9% when it gets really out of hand and idles at like 2300
Reply
Old Aug 21, 2024 | 04:11 PM
  #16  
carfixer007's Avatar
Senior Member


True Car Nut
 
Joined: Dec 2018
Posts: 3,239
Likes: 1,597
From: Flint, MI USA
carfixer007 is on a distinguished road
Default

Put these on one screen and let'* look at it with engine warm and at idle.
MAF
TPS
Load
Engine RPM
Set your MAF to grams per second
Reply
Old Aug 21, 2024 | 07:48 PM
  #17  
tglass1480's Avatar
Thread Starter
Junior Member
Posts like a Ricer Type-R
 
Joined: Aug 2024
Posts: 17
Likes: 17
tglass1480 is on a distinguished road
Default

Got the new tps today I’ll install tomorrow and put those numbers up, my tool doesn’t let me change from lbs/min to g/sec
Reply
Old Aug 21, 2024 | 09:26 PM
  #18  
carfixer007's Avatar
Senior Member


True Car Nut
 
Joined: Dec 2018
Posts: 3,239
Likes: 1,597
From: Flint, MI USA
carfixer007 is on a distinguished road
Default

Originally Posted by tglass1480
Got the new tps today I’ll install tomorrow and put those numbers up, my tool doesn’t let me change from lbs/min to g/sec
Should me in the settings.
Reply
Old Aug 22, 2024 | 10:07 AM
  #19  
tglass1480's Avatar
Thread Starter
Junior Member
Posts like a Ricer Type-R
 
Joined: Aug 2024
Posts: 17
Likes: 17
tglass1480 is on a distinguished road
Default




New TPS in. Seems worse now, idle is around 300 rpms higher, that’* the third tps, I know you get some junk but I find it hard to believe that three are all bad. This one is a Delphi. Load was 5.5% in this run wouldn’t upload the pic, the tps when I was driving was all over the place. Kind of settled down once I was back parked and idle.
Reply
Old Aug 22, 2024 | 11:34 AM
  #20  
carfixer007's Avatar
Senior Member


True Car Nut
 
Joined: Dec 2018
Posts: 3,239
Likes: 1,597
From: Flint, MI USA
carfixer007 is on a distinguished road
Default

The TPS should be a smooth rise without dropouts. I'd be looking at the wiring.
Your MAF is reading twice what it should at idle.MAP should run at about 18.
Reply



All times are GMT -4. The time now is 08:59 AM.