Question about Ford F-150
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Posted on Jan 02, 2017
SOURCE: tps voltage high
is the tps adjustable on set screws? is something holding the throttle plate open a bit? throttle bore gummed up? a normal tps sweep is about .6 with throttle closed and about 5 volts wide open throttle(key on/engine off) 2nd check for vacuum leaks. what about mass airflow readings?
Posted on Nov 09, 2008
Voltage regulator is going bad. Have alternator tested or go ahead and have it replaced. Also this would be a good time to have the battery tested. Usually an alternator that is over charging will "cook" the battery causing it to not charge, not hold a charge, to losing the gel/electrolyte solution due to boil out.
Posted on Jul 17, 2009
I was reading in one of my repair manuals and it says in there that there could be a block where the exhaust gas pressure sensor is. There could be a blocked inlet hose. Or it could be the ECM.
Posted on Sep 11, 2009
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Mar 30, 2015 | Cars & Trucks
Sep 08, 2014 | 1994 Jeep Cherokee
Jul 07, 2014 | Cars & Trucks
Nov 10, 2013 | 2004 Ford Explorer
Fig. Fig. 1: ALDL connector-1994 models
Listings of the trouble for the various engine control system covered in this guide are located in this section. Remember that a code only points to the faulty circuit NOT necessarily to a faulty component. Loose, damaged or corroded connections may contribute to a fault code on a circuit when the sensor or component is operating properly. Be sure that the components are faulty before replacing them, especially the expensive ones. The Assembly Line Diagnostic Link (ALDL) connector or Data Link Connector (DLC) may be located under the dash and sometimes covered with a plastic cover labeled DIAGNOSTIC CONNECTOR.
Fig. Fig. 1: Typical Manifold Absolute Pressure (MAP) sensor
wiring diagram (wire color, terminal identification/location may vary on
Fig. Fig. 2: Using jumper wires and a high impedance voltmeter
test between MAP sensor terminals A and C with the key ON and engine
off. The voltage should be approximately 5 volts
Fig. Fig. 3: Next test between MAP sensor terminals A and B with
the key ON and engine off. The voltage should be approximately 0.5 volts
Throttle position sensor test
TESTINGSee Figures 1, 2 and 3
Fig. Fig. 1: Common Throttle Position Sensor (TPS) wiring diagram
(wire color, terminal identification/location may vary on certain
Fig. Fig. 2: Using jumper wires and high impedance voltmeter, test
between the sensor ground and reference terminals, the voltage should
be approximately 5 volts
Fig. Fig. 3: Next test between the sensor signal and ground
terminals, verify that the TPS voltage increases or decreases smoothly
as the throttle is opened or closed
Oct 01, 2011 | 1994 Chevrolet S-10 Blazer
Aug 15, 2011 | 2004 Kia Optima
1) Maladjusted TPS
2) Defective TPS
3) No +5 volt reference to TPS
4) TPS-return to ECM is shorted to ground or to sensor ground
5) Defective ECM
Good luck, i hope this helps.
Jul 01, 2011 | 1995 GMC Sierra C1500
Jan 12, 2011 | 2005 Kia Sedona
Oct 29, 2010 | 1993 Chevrolet C1500
Nov 13, 2009 | 1995 GMC Sierra C1500
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