Question about 2003 Dodge Dakota Club Cab

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Does map sensor have a vacuum line?

3.9 v6 map sensor

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Yes, there has to be a vacuum line from the intake manifold. It measures intake manifold vacuum and converts it to a varying electrical signal to the computer.

Posted on Mar 28, 2014

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Posted on Jan 02, 2017

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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

Do you have a diagram for 1995 chevy tahoes vacuum system ?


Here is one for a v6 but their all pretty much the same. It should also be on a sticker on the core support or underneath the hood
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Apr 23, 2016 | Cars & Trucks

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Where is map sensor located


If I recall correctly, the MAP sensor on that vehicle is mounted on the firewall, close to the middle of the vehicle but slightly to the passenger side, just a few inches from the a/c air exchanger. It will have a two- or three- pin plug, and a single vacuum line attached to it, and will be affixed to the firewall by two screws.

Sep 06, 2014 | 2012 Nissan Frontier S Crew Cab Pickup...

2 Answers

Can't find map sensor on a 2002 hyundai santa fe v6


If you have a mass air flow sensor in the big boot from air cleaner housing to throttle body, likely there is no map sensor.

Dec 30, 2012 | 2002 Hyundai Santa Fe

1 Answer

Too much gas being dumped into throttle body of 1988 plymouth voyager v6


at the risk of asking for clarification on motor size and equiptment, im going out on a limb and guessing you have one of three problems, 1)bad o2 sensor,2)map sensor, map sensor hose,or 3)if you have an egr valve, it could be leaking and tricking the o2 senson, oh yeah, did i mention the coolant temp. sensor could be telling the ecm that it is -40 degrees? check the vacuum line to map sensor for cracks, you should have a lable under the hood to show you the hhoses. also the coolant sensor is near the distributor, unplug it and chheck for corrosion on the terminals, as for the o2 sensor you are going to need a scanner or volt meter tocheck that.but check the basics first. vacuum leaks,ect.

May 04, 2012 | 1988 Plymouth Voyager

1 Answer

Exhaust pipe is blowing out a mist of black smoke


BLACK EXHAUST SMOKE IS A RICH FUEL MIXTURE.CAUSE BY WEAK SPARK IGNITION, FAULTY MAP SENSOR CHECK MAP SENSOR VACUUM HOSE AND ELECTRICAL CONNECTOR BECAUSE BAD MAP SENSOR WILL CAUSE RICH FUEL MIXTURE CHECK THE VACUUM LINE GOING TO FUEL PRESSURE REGULATOR, MAKE SURE FUEL PRESSURE REGULATOR GETTING VACUUM AT VACUUM LINE IF NOT LOOK FOR BROKEN OR DISCONNECTED VACUUM LINE TO FUEL PRESSURE REGULATOR, CHECK FUEL PRESSURE REGULATOR VACUUM LINE IF YOU SEE GASOLINE IN VACUUM DIAPHRAM TO FUEL PRESSURE REGULATOR REPLACE FUEL PRESSURE REGULATOR,CHECK THE EVAP CANISTER IF GAS SOAK IT WILL CAUSE RICH FUEL MIXTURE.

Aug 05, 2011 | 1995 Chevrolet Blazer

1 Answer

91 lumina apv with 3.1 V6. It started to have no throttle response and would almost die if you stepped on the throttle. I changed the oxygen sensor - no help. I jumped the diagnostics and it showed code 34...


CODE 34 ALSO COULD BE MAP SENSOR.BAD CHECK MAP SENSOR WIRING MAKE SURE IT ELECTRICAL CONNECTOR INTACT INPLACE.MAKE MAP SENSOR GETTING ENGINE VACUUM AT VACUUM HOSE.IF NOT LOOK FOR BROKE DISCONNECTED VACUUM LINES ON THE INTAKE MANIFOLD.

Jun 19, 2011 | Chevrolet Lumina APV Cars & Trucks

1 Answer

Component locator - cannot find the MAP sensor


TESTING-MAP- A vacuum line runs from the sensor mounted high to the intake manifold so it can measure the vacuum in the intake manifold. NOTE: Unusually high or low barometric pressures can generate a false DTC for the MAP sensor. If no driveability symptoms accompany the MAP code, do not replace it.
  1. Connect a MAP/BARO tester to the sensor connector and sensor harness connector. With ignition ON and engine OFF, use DVOM to measure voltage across tester terminals. If the tester's 4-6V indicator is ON, the reference voltage input to the sensor is okay. NOTE: The green light on the tester indicates that the VREF circuit is okay, 4-6 volts. A red light or no light indicates the VREF is either too low or too high.
  2. Measure the reference signal of the MAP sensor. If the DVOM voltage reading is as indicated in the table, the sensor is okay.
    1. Turn the ignition OFF.
    2. Disconnect the vacuum hose from the MAP sensor and connect a vacuum pump in its place.
    3. Apply 18 in. Hg of vacuum to the MAP sensor.
    4. If the MAP sensor holds vacuum, it is okay. If the MAP sensor does not hold vacuum, it must be replaced. Fig. 1: Manifold Absolute Pressure Sensor 84174020.gif
      Fig. 2: MAP sensor altitude/voltage output relationship 84174023.gif
      Fig. 3: MAP sensor frequency data 84174022.gif
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Oct 15, 2010 | 1994 Lincoln Town Car

1 Answer

Where is the map sensor located on 1985 s10 pickup 2.8 liter v6


it has one vacuum line to it and its half the size of a pack of cigarettes. Look around the intake area

Jan 09, 2010 | 1985 Chevrolet S-10

2 Answers

I have a 1996 chevy camaro rs, pulled code from computer, pulled up 1080 intake manifold faulty. what is this code reading? and what part is it saying is faulty? i don't have the manual.


I only see a code P0108- Manifold Absolute Pressure (MAP Sensor Circuit High Pressure) this is for both the V-6 and the 5.7 L V-8. this sensor measures the change in pressure in the intake, then converts the info into voltage output, what this means is that the vacuum is low, look for a lose or disconnected vacuum line, if none can be found replace your MAP sensor, I hope this solve your problem.

Sep 28, 2009 | 1996 Chevrolet Camaro

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