Author Topic: TPS Adjustment  (Read 291 times)

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Offline gnonyx

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TPS Adjustment
« on: February 14 2020, 07:21:00 PM »
Which one is more important; adjust the TPS idle reading of between 0.40 and 0.46 volts?
 or
 adjust until the sensor reads between 4.55 volts and 4.85 volts?
87 GN T-Top, ScanMaster, hot-wire kit, Full Throttle chips w/ matching 60# injectors, adj. fuel pump, and triple pod gauges w/ AEM A/F gauge, oil pressure gauge, vac/boost gauge, Kenne Belle rear seat brace, upgraded tranny w/ Art Carr pan cover, and a pre-lube oil system.

Offline nocooler

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Re: TPS Adjustment
« Reply #1 on: February 14 2020, 08:07:42 PM »
IhaveaV8

Offline Scoobum

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Re: TPS Adjustment
« Reply #2 on: February 14 2020, 08:07:47 PM »
Steve has the complete writeup on his site. Jeremy...ya' beat me by 5 seconds.
109 235 Cubic Inch Stock Stroke Balanced Rotating Assembly
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Offline gnonyx

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Re: TPS Adjustment
« Reply #3 on: February 14 2020, 09:34:05 PM »
I appreciate all comments
I do know how to adjust it, I just wanted to know is it the TPS is important or is the WOT voltage is or both work together
87 GN T-Top, ScanMaster, hot-wire kit, Full Throttle chips w/ matching 60# injectors, adj. fuel pump, and triple pod gauges w/ AEM A/F gauge, oil pressure gauge, vac/boost gauge, Kenne Belle rear seat brace, upgraded tranny w/ Art Carr pan cover, and a pre-lube oil system.

Offline Steve Wood

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Re: TPS Adjustment
« Reply #4 on: February 14 2020, 09:42:25 PM »
If you read the tps link above, all is explained. Tps has very little to do with performance.  Set the low  0.38 to 0.44.  set the high to 4.25 to 4.8




Of course, if you do not read the appropriate section in the link, then you will not check what is important.
« Last Edit: February 15 2020, 09:44:37 AM by Steve Wood »
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Offline TexasT

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Re: TPS Adjustment
« Reply #5 on: February 15 2020, 10:24:35 AM »
Both the parameters need to be adjusted correctly. That is why there are screws on top and bottom. Get both upper and lower numbers in spec and you should be good. Take your time, do it right. The engine will run better. Garbage in garbage out as they say in the computer guys world.
Rich

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Offline gnonyx

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Re: TPS Adjustment
« Reply #6 on: February 15 2020, 12:45:38 PM »
Thank You all for the suggestions, I will post again the results
87 GN T-Top, ScanMaster, hot-wire kit, Full Throttle chips w/ matching 60# injectors, adj. fuel pump, and triple pod gauges w/ AEM A/F gauge, oil pressure gauge, vac/boost gauge, Kenne Belle rear seat brace, upgraded tranny w/ Art Carr pan cover, and a pre-lube oil system.

Offline gnonyx

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Re: TPS Adjustment
« Reply #7 on: February 15 2020, 05:18:24 PM »
If you read the tps link above, all is explained. Tps has very little to do with performance.  Set the low  0.38 to 0.44.  set the high to 4.25 to 4.8




Of course, if you do not read the appropriate section in the link, then you will not check what is important.


Okay Steve,
 I readjusted and the only issue I may have is the Detent cable. I tired to adjusted the TPS to .42-.44 key on engine off, and then the WOT reading was 4.10. I then disconnected the detent cable and the wot was 4.6
I reconnected and adjusted the detent cable by pressing the "D" tap press the pedal to the floor and the wot is 4.3
I disconnected the orange wire, and reconnected again, start engine, warm up, and the following results:
AF-04-05
L8-33
BAT-13.9
INT-126-130
BL-136-141
NPH-0.0
CLT-168-175
AT5-70
R-750
TPS-.42-.44
IAC-10
CC-146-228
NAL-0.0


VAC-16.5-17
OIL PSI-28
A/F-14.6-15.2
87 GN T-Top, ScanMaster, hot-wire kit, Full Throttle chips w/ matching 60# injectors, adj. fuel pump, and triple pod gauges w/ AEM A/F gauge, oil pressure gauge, vac/boost gauge, Kenne Belle rear seat brace, upgraded tranny w/ Art Carr pan cover, and a pre-lube oil system.

Offline reality

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Re: TPS Adjustment
« Reply #8 on: February 15 2020, 05:56:48 PM »
A couple things there that would bug me
MAF seems low
BL is high
What are the IAC in gear.
May be just me tho.

Offline Scoobum

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Re: TPS Adjustment
« Reply #9 on: February 15 2020, 07:12:53 PM »
BLM's are high. You've got an air leak. 02 sensor could be fukd as well.
109 235 Cubic Inch Stock Stroke Balanced Rotating Assembly
Stock Crank
TRW .030 Pistons
Stock Rods
Stock Timing Chain/Gears
212/212 Flat Tappet Cam
JB Racing Heads
Stock Rockers
5.7 TT Race Chip
Built 2004R
AC 16930
6262 JB

6.72 at 104.67-25 PSI

I see slow people

Offline gnonyx

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Re: TPS Adjustment
« Reply #10 on: February 15 2020, 07:35:08 PM »
BLM's are high. You've got an air leak. 02 sensor could be fukd as well.
Originally I had an about 7 air leaks, including the throttle body seals, I repaired the little air leaks, and then removed the throttle body, replaced the both seals, and also replaced the oxygen sensor from ACDelco to Denso type since many were claiming Denso is a better oxygen sensor. Afterward, I did checked for any air leak by using a smoke machine and found no air leaks at all. Even the digital display turbo indicator started to work
87 GN T-Top, ScanMaster, hot-wire kit, Full Throttle chips w/ matching 60# injectors, adj. fuel pump, and triple pod gauges w/ AEM A/F gauge, oil pressure gauge, vac/boost gauge, Kenne Belle rear seat brace, upgraded tranny w/ Art Carr pan cover, and a pre-lube oil system.

Offline Scoobum

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Re: TPS Adjustment
« Reply #11 on: February 15 2020, 07:39:13 PM »
Pre turbo exhaust leaks...start checking.
109 235 Cubic Inch Stock Stroke Balanced Rotating Assembly
Stock Crank
TRW .030 Pistons
Stock Rods
Stock Timing Chain/Gears
212/212 Flat Tappet Cam
JB Racing Heads
Stock Rockers
5.7 TT Race Chip
Built 2004R
AC 16930
6262 JB

6.72 at 104.67-25 PSI

I see slow people

Offline gnonyx

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Re: TPS Adjustment
« Reply #12 on: February 15 2020, 07:58:49 PM »
A couple things there that would bug me
MAF seems low
BL is high
What are the IAC in gear.
May be just me tho.
The MAF was replaced from stock to Delphi (AF10056) 3-1/2" Mass Air Flow Sensor
Would the little exhaust leak from the downpipe donut cause the BL to be high?
I wouldn't know what are the IAC in gear is since the car is up on all floor jacks
87 GN T-Top, ScanMaster, hot-wire kit, Full Throttle chips w/ matching 60# injectors, adj. fuel pump, and triple pod gauges w/ AEM A/F gauge, oil pressure gauge, vac/boost gauge, Kenne Belle rear seat brace, upgraded tranny w/ Art Carr pan cover, and a pre-lube oil system.

Offline Scoobum

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Re: TPS Adjustment
« Reply #13 on: February 15 2020, 08:06:48 PM »
IAC is 10-20...you're good. Look for leaks at the turbo flange...cross over pipe...headers to heads...header cracks. EGR as well.
109 235 Cubic Inch Stock Stroke Balanced Rotating Assembly
Stock Crank
TRW .030 Pistons
Stock Rods
Stock Timing Chain/Gears
212/212 Flat Tappet Cam
JB Racing Heads
Stock Rockers
5.7 TT Race Chip
Built 2004R
AC 16930
6262 JB

6.72 at 104.67-25 PSI

I see slow people

Offline Scoobum

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Re: TPS Adjustment
« Reply #14 on: February 15 2020, 08:18:15 PM »

Steve has more patience than I do...here's his BLM writeup. I'm gonna go on a rant about BLM's and pre-turbo exhaust leaks on my YouTube channel any day now...


http://www.vortexbuicks-etc.com/blms.htm
109 235 Cubic Inch Stock Stroke Balanced Rotating Assembly
Stock Crank
TRW .030 Pistons
Stock Rods
Stock Timing Chain/Gears
212/212 Flat Tappet Cam
JB Racing Heads
Stock Rockers
5.7 TT Race Chip
Built 2004R
AC 16930
6262 JB

6.72 at 104.67-25 PSI

I see slow people