I have vacuum leaks .I have problems connecting the vacuum lines

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code p 0106 refers to manifold absolute pressure(MAP) sensor / barometric pressure (BARO) sensor---range /performance problem===causes --intake exhaust leak---wiring---MAP sensor---BARO sensor
code p 442 refers to evaporative emission(EVAP) system--small leak detected===causes --hose connections ---intake leak---EVAP cannister purge valve
it also refers to EVAP system ---large leak detected ---cap loose/ off ===causes --mechanical fault , hose connection EVAP pressure sensor
code p 0455 refers to EVAP system --large leak detected ===causes same as for p 0442 causes

When cold start is on will make more fuel to the engine for warm up. Only makes sense that even after warm up it's still putting the extra fuel into the engine that a heat sensor is bad. Namely the one connected to the MAP. Use your head, not the mechanics with all they're test equipment that are checking the wrong thing. You've put out a lot of cash because they don't know what to check for and are putting YOU through this. They're in it for the money pal. Not to help fix your problem.

wow , you actually tried to look it up, a 1st time here.

the MAP is a baro sensor used to calculate fuel injection RATES.

if you have gross air leaks to the system the engine IDLE screams.

is it?

108 means the voltage is too high.

usually its unplugged, or bad sensor.

otential causes of a P0108 code: Bad MAP sensor Leak in vacuum supply line to MAP sensor Engine vacuum leak Short on signal wire to PCM Short on reference voltage wire from PCM Open in ground circuit to MAP Worn engine causing low vacuum



Bad MAP sensor Leak in vacuum supply line to MAP sensor Engine vacuum leak Short on signal wire to PCM Short on reference voltage wire from PCM Open in ground circuit to MAP Worn engine causing low vacuum



http://www.obd-codes.com/p0108



and last. but before ECU.

low engine compression, is 1 more, causes , many



what i do is reseat the MAP sensor

i then make sure he vacuum port is not clogged. (both sides)

i then measure the output , keyon, and idle and gunning throttle.

any Voltmeter works here,

key on is 5v or near.

idle 1.8v

gun engine as the RPMs fall like a rock the volts tries to hit 0.5vdc.



http://www.fixkick.com/look/odds-ends/jeep/MAP-sensor-output-real.jpg



very very easy to find with a voltmeter

if the meter agrees with vacuum gage, then the MAP is ok

and you have air leaks or low vacuum for (VAST reasons)

ask.

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.

No, I would say that it is a FUEL problem. The Powertrain (or Engine) Control Module (PCM or ECM) uses the MAP sensor input to adjust the pulse-width of the fuel injectors and provide the correct amount of fuel to the combustion chambers. If the MAP sensor signal is too high or too low, the PCM will either shut the injectors off, starving the engine for fuel, or it will open them all the way up, causing the engine to flood.

Diagnostic Test Code (DTC) P0107 is TRYING to tell you that the computer has recognized a problem with the MAP sensor input circuits. THIS is what the problem is! Actually this code is saying that the input is LOW. This can be caused by broken wires, loose or corroded connector terminals, or a faulty MAP sensor.

I highly recommend checking the wiring before going out and buying a MAP sensor. It is that time of year...just this week I have fixed 4 cars that have had wire damage due to rodents getting up into the (WARM) engine compartment and chewing on the wire harnesses.

although your scanner detected a faulty map sensor is not a fact that is bad, it may have a bad connection or a vacuum leak you may start by checking the connector for any cracks dirt or bended terminals any thing that keep it from making a good connection . vacuum leaks also play a big role in the malfunction of map sensor . check all your vacuum lines a image diagram is usually posted in the inner fender or under hood an easy way to look for vacuum leaks is by using a piece of hose. garden hose be will be ok. with engine run get the hose next to your ear and move it along the vacuum lines you will be able to hear the leak if is there.

If there is a 'vacuum leak', then a hose may be leaking or disconnected from a device such as the EGR valve (on older engines), for instance. Or, it could be a loose or leaking MAP sensor gasket:


Manifold Absolute Pressure (MAP) Sensor Removal & Installation 3.5L & 3.9L Engines To Remove:
MAP sensor (typical)

1. Remove the engine cover.
2. Disconnect the MAP sensor electrical connector.
3. Remove the MAP sensor mounting bolts from the intake manifold and remove the MAP sensor with the retainer bracket and seal.

To Install:

1. Install the MAP sensor with the retainer bracket and seal to the intake manifold. Tighten the mounting bolts 18 ft-lb (25 Nm).
2. Connect the MAP sensor electrical connector.

5.3L Engine To Remove:

1. Remove the engine cover.
2. Disconnect the manifold absolute pressure sensor (MAP) harness connector. MAP sensor (typical 5.3L)
   
   
3. Remove the MAP sensor from the intake manifold.

To Install:

1. Apply clean engine oil to the MAP sensor inlet tube.
2. Install the MAP sensor on the intake manifold.
3. Connect the MAP sensor harness connector.
4. Install the engine cover.

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May want to purchase a Haynes or Chilton manual and study the vacuum line diagram to see if you can determine if one of the vacuum hoses is loose or misplaced or broken.

One can also do a visual inspection of the hoses to see if any are disconnected from where they should be.

You need to get the Haynes Repair manual on your vehicle so you have a diagram of the vacum lines attached to your vehicle and where each connects. There is more than one Vacum line.

The MAP sensor (MANIFOLD ABSOLUTE PRESSURE) changes voltage or frequency as intake manifold pressure changes (air flow increases or decreases). The engine's computer uses the reading to advance or ****** engine timing. On older, non-fuel injected engines the vacuum advance on the distributor did basically the same thing.
The MAP sensor also works with other sensors on the Jeep engine, specifically the Throttle Position Sensor (on the throttle body) and Crank Position Sensor (on the transmission bell housing) to control other fuel flow and ignition timing functions.
If you're having problems with the MAP sensor, or are getting a Check Engine light and code for the MAP sensor keep in mind that other problems may cause that error code.
Bad vacuum hoses, vacuum leaks, bad EGR valves, intake manifold leaks, clogged air filter can all affect the MAP. sensor. To know for sure all the other sensors should be checked for correct voltage and perimeters
Also, if you have done any mods to the engine, especially intake, exhaust and ignition mods you may get an error code for the MAP or incorrect reading and a resulting loss in power or increased fuel usage.
The map sensor is easy to change with a couple screws off the Throttle body.. The part the air inters (the air breather). Buy one from the auto parts store if your sure that is the problem and just replace it..There is no adjustments to it...

It really sounds to me that you have a small vacuum leak in a line somewhere.You can try spraying the motor vacuum lines with soapy water with the vehicle running to find a leak. Also listen and feel under the dash for leaks and hissing sounds.
Hope this helps.......