TPS voltage at 15.v @ half throttle
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Joined: Jul 2006
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From: Oregon
Car: 87 Formula 350
Engine: 350tpi
Transmission: TH700R4
Axle/Gears: 3.23 limited
TPS voltage at 15.v @ half throttle
as you have guessed, my car is not running right.
When idling the voltage will vary from .54v to .59v and sometimes dropping to .10v, this is testing with a voltmeter at the TPS.
When I datalog with WinALDL, my dash display window says the car is at .7v at idle and around 15.v while driving (engine coughing, studdering etc.)
ANY idea what is causing this? the SES flashes once when I turn the car to "run", stating the ECM and PROM are functioning properly?
I've replaced -everything-, except the prom.
When idling the voltage will vary from .54v to .59v and sometimes dropping to .10v, this is testing with a voltmeter at the TPS.
When I datalog with WinALDL, my dash display window says the car is at .7v at idle and around 15.v while driving (engine coughing, studdering etc.)
ANY idea what is causing this? the SES flashes once when I turn the car to "run", stating the ECM and PROM are functioning properly?
I've replaced -everything-, except the prom.
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Joined: Jul 2005
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From: North Central Mass.
Car: 1985 Berlinetta
Engine: Megasquirted TPI
Transmission: Transgo 700R4
Axle/Gears: 3.42
Re: TPS voltage at 15.v @ half throttle
What is the reference voltage? This should be a regulated 5v from the ECM
If there is a difference in the voltage between the datalog and the actual reading I would suspect noisy/faulty grounding of the ecm.
Is that 15? or .15?
There is no way possible it is fifteen.
If there is a difference in the voltage between the datalog and the actual reading I would suspect noisy/faulty grounding of the ecm.
Is that 15? or .15?
There is no way possible it is fifteen.
Thread Starter
Member
iTrader: (2)
Joined: Jul 2006
Posts: 123
Likes: 0
From: Oregon
Car: 87 Formula 350
Engine: 350tpi
Transmission: TH700R4
Axle/Gears: 3.23 limited
Re: TPS voltage at 15.v @ half throttle
ohhhh, sorry, that was the percentage I was looking at. I'm new to datalogging.
but Toehead (or anyone else), if the SES light flashes once while turning the ignition to 'run', that means the ECM and PROM is working properly right?
the SES light will only flash when the fuel pump comes on.
the problem is the car accelerates fine but once the speed of the car levels out with the rpm the engine starts to misfire. every part is new or tested good, except the prom.
no codes either.
but Toehead (or anyone else), if the SES light flashes once while turning the ignition to 'run', that means the ECM and PROM is working properly right?
the SES light will only flash when the fuel pump comes on.
the problem is the car accelerates fine but once the speed of the car levels out with the rpm the engine starts to misfire. every part is new or tested good, except the prom.
no codes either.
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