Question about 1999 Jeep Wrangler

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1999 jeep wrangler`

I replaced the exahaust manifold on my jeep and now it runs wide open. so i replaced the map sensor but it did not help

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4.0l? The intake on a 4.0 has 2 dowels it sits on in the head. You probably have the intake sitting on top of one of the dowels, not sitting flush with the head causing it to have a massive vacuum leak.

Posted on Oct 18, 2008

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Getting trouble code 106. What is solution for correcting this problem. Thank you. 2005 crossfire.


Chrysler codes,. only.

p0106,

on newer Chysler, cars they have many codes with 106, leaving out the prefix is bad idea.

Like U0102

or C0106?

P0106 is MAP performance failure. (that dont mean replace it)

the puter has no IDEA what is wrong, only that tests failed.

here are the conditions.

When Monitored and Set Condition



  • When Monitored: Engine running for at least 30 seconds and no fault in the throttle valve actuator.


  • Set Condition: Low limit: The Manifold Absolute Pressure (MAP) Sensor reading is below a calculated value when the throttle valve angle is greater than 80F for approximately 5 seconds. High limit: The MAP Sensor reading is greater than a calculated value that is determined by engine speed and throttle valve angle for approximately 5 seconds.




now in gringo or bar stool.

1: the puter brain saw you go near wide open throttle and the

map sensor (vacuum sensor) do not show new zero vacuum.

even a clogged air filter could do this, causing a false high vacuum







POSSIBLE CAUSES




MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT OPEN




MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND




MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE




5-VOLT SUPPLY CIRCUIT OPEN




5-VOLT SUPPLY CIRCUIT SHORT TO GROUND




5-VOLT SUPPLY CIRCUIT SHORT TO VOLTAGE




5-VOLT SUPPLY CIRCUIT SHORT TO SENSOR GROUND CIRCUIT




MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIRCUIT




MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO 5-VOLT SUPPLY CIRCUIT




SENSOR GROUND CIRCUIT OPEN




ENGINE OIL SENSOR




MANIFOLD ABSOLUTE PRESSURE SENSOR




POWERTRAIN CONTROL MODULE






then the FSM goes to step by step tests. to find above reasons.

omitted. (too long )



the word low is ambiguous in all FSM.

it can mean, low plenum pressure,

or low vacuum (opposite)

and low voltage, its a pain in the xxx to find this fact out.

the map outputs high voltage for low vacuum (same as high absolute pressure)



the fsm tests are inane.

we check the voltage out of the map

at keyon

running

and wide open throttle for 1 second. just gun it and watch.

here is what it does.

left side is wide open throttle, idle is 20 inchs. key on is, WOT.

so, what is that

4.5v is keyon

start engine, get about 1.5v

the gun engine, then drop throttel to zero throttle fast

the causes,. huge vacuum about 24 inches, or 1v or less

this is a working MAP. if those tests pass.

the test (OBD2 monitor) fails for about not getting near 4vdc from MAP output pin, DOES THIS HELP?





8cbad531-1ef9-4812-919d-b64a619a8caf.jpg

Jul 07, 2014 | Cars & Trucks

1 Answer

Where is the MAP sensor on 99 jeep grandcherokee 4.7 L 8 cylinder


On 4.7L the MAP sensor is located on the front of the intake manifold. An O-ring seals the sensor to the intake manifold.

zjlimited_1118.jpg
(click over image for zoom)

  1. Disconnect electrical connector at sensor.
  2. Clean area around MAP sensor.
  3. Remove 2 sensor mounting bolts.
  4. Remove MAP sensor from intake manifold.

Hope this helps.

Apr 27, 2011 | 1999 Jeep Grand Cherokee

1 Answer

1998 jeep wrangler 4.0...trying to locate the IAT sensor on throttle body...there are three sensors on throttle body...i know which on is maps


The IAT on your Jeep should be located on the intake manifold, directly behind the throttle body. It will be a screw in sensor with a two wire plug.

Mar 20, 2011 | 1998 Jeep Wrangler

1 Answer

Looking for vacuum system diagram for a 1995 Jeep wrangler? Specifically, the MAP sensor.


Map sensor should be a single hose from the sensor to the intake manifold. On the newer ones they attach the map to the throttle body with a short nipple between the sensor and the TB base, eliminating the hose..

Nov 23, 2010 | 1995 Jeep Wrangler

1 Answer

Replaced exhaust manifold on 99 jeep wrangler. turned ignition to start up and engine screams in full throttle, what could be the problem: vacuum, sensor???


The intake manifold is the common culprit for this. It may look like it is flush to the block, but it isnt and is causing a huge vaccum leak. There are two locating dowel pins that the manifold must be flush on before tightning the bolts. The usual problem is that the manifold is resting on top of these pins instead of flush, causing a gap. You have to unbolt the intake and exhaust manifolds, relocate the intake and replace the bolts.

Oct 19, 2010 | 1999 Jeep Wrangler

1 Answer

1994 jeep wrangler backfiring missing,


The problem is one of your coil packs is bad. Don't throw money into sensors, they are false codes. The problem is coil packs.

Feb 20, 2010 | 2004 Jeep Wrangler

2 Answers

2.5 4 cyl engine Code P0171....Black Soot in the exahaust and water...Black soot on the plugs. I have replaced the catc and muffler, MAP sensor, coolant temp sensor, coil, plugs, wires, dist cap,cleaned...


Black soot in water? You mean water in the tailpipe or black soot in the coolant in the radiator? Have you tested the manifold air temp sensor and the throttle position sensor? If they were OK, you may just have worn injectors that are allowing a bit too much fuel flow or a bad spray pattern. In the meantime, you could try replacing the plugs with a set that is one heat range hotter. If the plugs become slightly fouled, that can cause a snowball effect which makes the situation worse.

Nov 11, 2009 | 1997 Jeep Wrangler

1 Answer

I Have a 2000 Jeep wrangler V 6 4.0 liter. ITs running rich.


4.0 is an L 6 . Not having the luxury of being there and doing the necessary testing myself, you will need to do that. You will need to get either a chilton or haynes basic manual and a decent digital volt/ohmeter. things I'd immediately check are the map sensor, manifold temperature sensor and finally, remove and visually inspect the fuel injectors (can test good electrically but be fouled on ends, causing a poor spray pattern). These are suggestions only...I would not replace any of these without testing.
Any questions about specific items, just ask!!
Good luck

Jun 22, 2009 | 2000 Jeep Wrangler

1 Answer

97 jeep wrangler 2.5 running lean


check fuel pressure and check exhaust for leaks. exhaust leaks caqn play with the o2 sensor readings

Sep 15, 2008 | 1997 Jeep Wrangler

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