Question about 1992 Toyota Previa
Tps is a throttle positioning sensor on the throttle body
maf is a mass air flow sensor which is mounted on the air intake to the air snorkle to the air filter tubing
Posted on Mar 20, 2011
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Posted on Jan 02, 2017
check for vacuum leak, could be power brake assist, high rpm indicates leak
Posted on Oct 26, 2009
Testimonial: "vaccuum leak wasnt the problem, unfortunatly the computer went bad in the car. Thank you for your quick response."
SOURCE: 1997 Ford E150 5.0 L
For the TPS you would need a voltmeter to measure the voltage variations as you move the TPS. Usually there is a marking for the stock position which is recommended to be set to that.
For the procedure and values please see link below:
As for the MAF sensor errors can be detected by the ECU. You may use a scanner to check for errors pertaining to the MAF. As to adjustments or fix, the only fix that can be done is by cleaning using ones used by tuners or contact cleaners to get rid of contaminants.
Posted on Apr 27, 2011
SOURCE: 1998 Astro code P0102 low
Try cleaning the TPS and IAC( idle air control) valve .also clean the throttle body with throttle cleaner.Then see, if that is helping.If not then MAF needs to be replaced, as the error code is triggering towards the MAF.--------
The IAC valve is screwed in to the side of the throttle housing (where the gas pedal hooks up to the engine).You'll need to remove the interior engine cover(dog house).Torx screws for the covers, 2 bolts on floor. and bolts against the fire wall (You can use a long extension with a swivel socket at the end).----------- This will help.Thanks.Helpmech.
Posted on Jun 20, 2011
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WITH MANUAL TRANSMISSION
Table 3: Using the Hi-Scan Pro in the Hyundai Diagnostic Menus Current Data Screen TPS (%) 0
MAF (kg/h) 9.5
Table 4: Using the Hi-Scan Pro in the OBD-II Menus Current Data Screen TPS (%) 0
MAF (g/h) 2.5
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