Question about 1994 Honda Accord

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HELP!! My 94 Honda accord automatic is shifting too early????

I replaced my tps and map sensor on the throttle body and now its shifting too early. could it be my timings off a little...? I think maybe when I put my tps ( trottle position sensor ) on i didnt line it up right or somthing.

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  • Anonymous Mar 24, 2014

    automatic when started can shift with tps connected, once disconnected i can shift

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Are you sure you placed the tab correctly when you installed the TPS. Is the TPS adjustable. Be sure its centered as best as possible,

Posted on Jul 15, 2009

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  • Master
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Remove put in old ones and see if problem goes away you need to do some process of elimination whatever the cause could be a defective sensor or wrong part? wiring wrong? many things can cause this also check oxygen sensor....

Posted on Jul 15, 2009

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I have a 94 Dodge ram 1500 four-wheel-drive 5.9 L the truck has no power the transmission shifts at the wrong time and jugs on the freeway


Test the map and tps. If the throttle is controlled electronically, also test the accelerator position sensor. Make sure the tps signal changes smoothly as the throttle is opened.

Manifold Absolute Pressure (MAP) Sensor
OPERATION The Manifold Absolute Pressure (MAP) sensor is a device which monitors manifold vacuum. It is either mounted on the firewall or throttle body and is linked electrically to the on-board computer. The MAP transmits information on manifold vacuum conditions to the computer. This data determines engine load and is used with data from other sensors to adjust the air/fuel mixture.
On the 2.5L engine, the MAP sensor is mounted in the right rear side of the engine compartment. It is connected to the throttle body by vacuum line. The MAP sensor on V6 and V8 engines is mounted to the throttle body. It is connected by an L-shaped rubber fitting. The V10 MAP sensor is found on the right side of the intake manifold and senses vacuum in the manifold.
TESTING See Figure 1
To completely test this sensor and its circuitry, you will need a DRBII scan tool, or equivalent. This is a test of the MAP sensor only. This test is for all engines except the 4-cylinder.
On the V6 and V8 engines: inspect the rubber fitting from the MAP sensor to the throttle body. Repair if necessary.On the V6 and V8 engines: test the MAP sensor output voltage at the connector between terminals A and B (see drawing). With the ignition ONand the engine OFF , the output voltage should be 4-5 volts.Test the engine controller terminal No. 1 for the same voltage to confirm that the wiring is in good shape. Repair if necessary.Test the MAP sensor voltage at the sensor connector between terminals A and C with the ignition ON . The voltage should be 4.5-5.5 volts. Also check terminal No. 6 of the engine controller wiring harness for the same voltage. Repair or replace the wiring as necessary.Test the engine controller pin-1 for the same voltage to verify the wire harness condition.
0900c15280070d92-jnh1p0frnkt3q2fbcpfimq4v-1-1.gif Fig. 1: Terminal connections for testing the MAP sensor


Throttle Position Sensor (TPS)
The Throttle Position Sensor (TPS) is located on the throttle body and tells the computer when the engine is at idle, off-idle, or at Wide-Open Throttle (WOT). At idle, the computer cancels the spark advance. Idle speed is computer-controlled through the automatic idle speed motor.
TESTING To completely test this sensor and circuitry, you need the DRBII scan tool, or equivalent. This is a test of the sensor only. This test applies only to V6, V8 and V10 engines.
This test requires a digital voltmeter. The sensor must be checked on the vehicle with its 3-wire connector engaged to the sensor. The center terminal wire of the sensor connector is the output terminal.
Remove the air cleaner housing.Attach the positive lead of the voltmeter to the center terminal of the sensor harness.Attach the negative lead of the voltmeter to a good ground.With the ignition key in the ON position and engine not running, check the sensor output voltage at the center terminal wire of the connector. Check this at idle (throttle plate closed) and at Wide Open Throttle (WOT). At idle, the sensor output voltage should be greater than 200 millivolts. At WOT, the sensor output voltage should be less than 4.8 volts. The output voltage should increase gradually as the throttle plate is slowly opened from idle to WOT.If the sensor does not meet specifications, replace it.

Fig. 1: Common TPS mounting-V6 and V8 engines

0900c15280070d99-jnh1p0frnkt3q2fbcpfimq4v-1-4.gif


Fig. Fig. 2: Common TPS mounting-V10 engine


0900c15280070d9c-jnh1p0frnkt3q2fbcpfimq4v-1-8.gif

Aug 13, 2017 | Dodge Cars & Trucks

1 Answer

How to Adjust idle RPM for a 2003 honda accord. some people were talking about a screw on the throttle body. but I can't find that screw. How do you go with adjusting this and where to find it ?


There isn't an adjustment screw that you really manipulate. The computer dynamically controls the throttle using the information it gets from the throttle positioning sensor (TPS) on the throttle body. The TPS is secured with tamper proof bolts that the head breaks off when torqued down. If you remove the throttle body and extract those bolts, then you can add bolts/screws with head and can be loosened and tightened. Then you can move the TPS back and forth to adjust the idle.

I wouldn't recommend doing this though: if there is and issue with the idle, it is because something is malfunctioning, not because it needs to be adjusted.

Mar 04, 2012 | 2006 Honda Accord

1 Answer

How do i stop the egine from idleing when it warm up ?


When your vehicle is warm and it idles like it is cold, you have a faulty TPS-throttle position sensor, and it needs to be replaced. The TPS sensor is located on the throttle body, has a plugin and is usually held on by 2 screws.

Apr 01, 2011 | 1990 Honda Accord

1 Answer

94 Mercury Villager,160K. With overdrive on shifts hard in and out. Recently developed trouble shifting into 3rd. Not constant. Fluid looks good. Not slipping.


check or replace the TPS sensor on the throttle body. Throttle position sensor.

It is a very delicate adjustment after replacement with a voltmeter.

If not that, replace the dropping resister.

go here for files and photos on how to do it

http://groups.yahoo.com/group/villagerquest/

Dec 08, 2009 | 1994 Mercury Villager

1 Answer

Rpm shoots up to 3500 dwn to 1500 up again down again .


scan it check tps sensor.also check for sticking throttle linkage.also check idle speed control.

Jul 17, 2009 | 1995 Honda Accord

2 Answers

My 2000 Neon starts early in the morning when temp is down, as soon as the engine heats up and the fan engages, the car will die and not start again. Help please.


you should check the voltage out put it should be 13.50v or more if it's less the you have a problem with the wiring or alternator

Jul 12, 2009 | 2000 Plymouth Neon

1 Answer

2001 Acura 3.2 CL Type-S TPS and Map sensor issues...


no need to replace the throttle body , and i think that you make a test before to buy any piece . disconnect the negative battery terminal few minutes, then connnect and start engine again, drive few minutes by observing the engine, if light comes again, replace only map sensor ,good luckl

Apr 24, 2009 | 2001 Acura 3.2CL

3 Answers

2002 Honda Civic Lx - TPS Sensor


The sensor does control trans.It takes a reading to where the throttle is and tells the trans what gear to be in and when to shift,down shift.So if your getting that reading and the car does not seem to be shifting right suspect that sensor..Hope this helps you and have a great day>>>

Apr 01, 2009 | 2002 Honda Civic

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