throttle position sensor error...on a new sensor!!!
#1
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Car: 1989 pontiac firebird formula
Engine: 5.7 350 tpi
Transmission: 700r4 i think
throttle position sensor error...on a new sensor!!!
howdy all, I've been struggling with my 89 formula and its running ruff im getting the the throttle position sensor code and ive already put a new sensor in it. the sensor is putting out enough voltage so im at a loss any ideas, im starting to truly get desperate.
#2
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Re: throttle position sensor error...on a new sensor!!!
Did you reset the ECM yet?
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Car: 1989 pontiac firebird formula
Engine: 5.7 350 tpi
Transmission: 700r4 i think
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Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: throttle position sensor error...on a new sensor!!!
Be aware
A code is for a fault SOMEWHERE in a system ;NOT that the sensor of that system is actually faulty.
You have to work through the fault diagnostics for that code ; could be a power , wiring or ground problem .
Which is why you identify the actual problem 1st before throwing $$$ at it in the hope it goes away
#5
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Re: throttle position sensor error...on a new sensor!!!
How long did you leave it unhooked for. It needs to be a unhooked for a few minutes to reset.
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Car: 86 IROC
Engine: 5.0 TPI
Transmission: 700-R-4
Axle/Gears: 2.73 open
Re: throttle position sensor error...on a new sensor!!!
Which code ; high or low ?
Be aware
A code is for a fault SOMEWHERE in a system ;NOT that the sensor of that system is actually faulty.
You have to work through the fault diagnostics for that code ; could be a power , wiring or ground problem .
Which is why you identify the actual problem 1st before throwing $$$ at it in the hope it goes away
Be aware
A code is for a fault SOMEWHERE in a system ;NOT that the sensor of that system is actually faulty.
You have to work through the fault diagnostics for that code ; could be a power , wiring or ground problem .
Which is why you identify the actual problem 1st before throwing $$$ at it in the hope it goes away
#7
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Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: throttle position sensor error...on a new sensor!!!
They only indicate a problem seen in a system , with a flow chart on how to identify the problem
They don't tell you what is actually wrong and give you the part # needed to fix it
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#8
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Re: throttle position sensor error...on a new sensor!!!
#9
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Car: 1989 pontiac firebird formula
Engine: 5.7 350 tpi
Transmission: 700r4 i think
#10
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Re: throttle position sensor error...on a new sensor!!!
#12
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Re: throttle position sensor error...on a new sensor!!!
all you really need to do is "center it out" on the bolts.
(it needs to be straight up and down with no angle)
(it needs to be straight up and down with no angle)
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Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: throttle position sensor error...on a new sensor!!!
Really handy having newbies handing out potentially wrong advice
Need to state what year you are talking about ; not all are the same.
85 - 89 have to be set to a certain V value as stated above
90 - 92 are non adjustable and the ECM uses a different method to set the base value
Need to state what year you are talking about ; not all are the same.
85 - 89 have to be set to a certain V value as stated above
90 - 92 are non adjustable and the ECM uses a different method to set the base value
#15
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Re: throttle position sensor error...on a new sensor!!!
Really handy having newbies handing out potentially wrong advice
Need to state what year you are talking about ; not all are the same.
85 - 89 have to be set to a certain V value as stated above
90 - 92 are non adjustable and the ECM uses a different method to set the base value
Need to state what year you are talking about ; not all are the same.
85 - 89 have to be set to a certain V value as stated above
90 - 92 are non adjustable and the ECM uses a different method to set the base value
88 IROC-Z
My car ran wrong and threw a code when it wasn't centered. But then again my car is a little "weird" from the factory...
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: throttle position sensor error...on a new sensor!!!
#17
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Car: 1989 pontiac firebird formula
Engine: 5.7 350 tpi
Transmission: 700r4 i think
Re: throttle position sensor error...on a new sensor!!!
I thought I had, it's an 89 tpi 5.7
#18
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Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: throttle position sensor error...on a new sensor!!!
I suspect ( actually I know ) if you read the TPS section in your FSM it will say different
The procedure is well documented on here and other online sources
https://www.thirdgen.org/tpimod2
http://www.iroczone.com/2009/10/adju...on-sensor-tps/
The procedure is well documented on here and other online sources
https://www.thirdgen.org/tpimod2
http://www.iroczone.com/2009/10/adju...on-sensor-tps/
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Car: 91 Camaro RS
Engine: 305 TPI conversion.
Transmission: T56
Axle/Gears: 3.73 posi 4th gen rear
Re: throttle position sensor error...on a new sensor!!!
I had been having issues with my 305 tpi as well. it idles fine but a little gas ad it studders and pops. I switched out the tps for another one and adjusted it as it read in the articles provided above. No effect. I came across this thread and read that 90-92 are non adjustable. I have a 92 tpi. could this be why im still having the issue? I thought all tps were basically the same?
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Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: throttle position sensor error...on a new sensor!!!
The '730 ECM used in the MAP cars uses whatever voltage it sees when the key is 1st turned on from the TPS as it's base value ; hence the non adjustable TPS on those engines
The MAF cars require the TPS to be set to the prescribed value
#21
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Car: 91 Camaro RS
Engine: 305 TPI conversion.
Transmission: T56
Axle/Gears: 3.73 posi 4th gen rear
Re: throttle position sensor error...on a new sensor!!!
They are but are setup differently
The '730 ECM used in the MAP cars uses whatever voltage it sees when the key is 1st turned on from the TPS as it's base value ; hence the non adjustable TPS on those engines
The MAF cars require the TPS to be set to the prescribed value
The '730 ECM used in the MAP cars uses whatever voltage it sees when the key is 1st turned on from the TPS as it's base value ; hence the non adjustable TPS on those engines
The MAF cars require the TPS to be set to the prescribed value
I need to switch back to a non adjustable tps in my car. I have the 730 ecm and map. what should the voltage be at turn on, or how do I test this type of tps to see if its correct or defective. im not getting any codes on it, before or now
#22
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Car: 91 Trans Am
Engine: 355 TPI
Transmission: Built T-5
It doesn't matter what voltage is at. The ecm uses whatever voltage its at on startup as its base reference. As long as the voltage goes up smoothly its good
#23
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Car: 1989 pontiac firebird formula
Engine: 5.7 350 tpi
Transmission: 700r4 i think
Re: throttle position sensor error...on a new sensor!!!
i just remembered the first problem this car had was the engine coolant fan wouldn't shut off. it lead to the battery dying, then the ignition relay went out, then the fuel pump would randomly not work so I replaced that, and now its something in the throttle position sensor's loop. could any of this be related? could it be the manifold air temperature sensor? or the coolant temperature sensor? im only getting the tps code
Last edited by Hlvo13; 04-16-2014 at 01:46 PM.
#24
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Re: throttle position sensor error...on a new sensor!!!
What code is it?
#25
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Car: 1989 pontiac firebird formula
Engine: 5.7 350 tpi
Transmission: 700r4 i think
#26
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Re: throttle position sensor error...on a new sensor!!!
May need to double check, I show code 43 is for Electronic Spark control.
#27
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Re: throttle position sensor error...on a new sensor!!!
I show code 21 for TPS Voltage High and code 22 TPS Voltage low.
Mitchel 1 refers to it as a 5.7 PFI. Even though it is TPI.
Mitchel 1 refers to it as a 5.7 PFI. Even though it is TPI.
#28
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Car: 1989 pontiac firebird formula
Engine: 5.7 350 tpi
Transmission: 700r4 i think
Re: throttle position sensor error...on a new sensor!!!
I show that 43 can be tps, knock, or low voltage, but for the low voltage what should I do? also those small Bluetooth code readers worth anything? the like 20 dollar ones that you connect to a smart phone or laptop?
#29
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Re: throttle position sensor error...on a new sensor!!!
If you have a fax machine I can send you a flow chart?
#30
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Car: 1989 pontiac firebird formula
Engine: 5.7 350 tpi
Transmission: 700r4 i think
#31
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Re: throttle position sensor error...on a new sensor!!!
I have no scanner sir. Sorry.
#32
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Car: 1989 pontiac firebird formula
Engine: 5.7 350 tpi
Transmission: 700r4 i think
Re: throttle position sensor error...on a new sensor!!!
its fine maybe I can find it on google, what should I look for?
#33
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Re: throttle position sensor error...on a new sensor!!!
Pics from my phone.
Hope this helps.
Hope this helps.
#34
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Car: 1989 pontiac firebird formula
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Transmission: 700r4 i think
Re: throttle position sensor error...on a new sensor!!!
thank you this should really come in handy
#35
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Car: 1989 pontiac firebird formula
Engine: 5.7 350 tpi
Transmission: 700r4 i think
Re: throttle position sensor error...on a new sensor!!!
So quick update I got the new tps and dialed it in and the check engine light when off after I reset the car. It runs fine up until about 1800rpm then it misses like crazy and the tac jumps to 7000rpm. Then when it gets to about 2100rpm the tac drops to where it's supposed to be and the engine runs fine, I took off my distributor cap and there is buildup in it along with black carbon marks on the center also the rotor is pretty worn. The shaft itself is pretty rusty but turned alright. Could the cap be the issue? It is also running pretty rich from the smell
#36
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: throttle position sensor error...on a new sensor!!!
Sounds like you need a tuneup.
#37
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Car: 1989 pontiac firebird formula
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Transmission: 700r4 i think
Re: throttle position sensor error...on a new sensor!!!
Yah I might aswell
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