2003 Ford Explorer 4.0L engine melts intake manifold

check the cat converter could be plugged

REMOVE UPER INTAKE 97 EXPLORER V6 4.0 - YouTube

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https://www.youtube.com/watch?v=ugExJ0wkP8A
Jun 11, 2013 - Uploaded by Sum Guy
REMOVE UPER INTAKE 97 EXPLORER V6 4.0 ... I was told that all I have to do is remove the fan belt to get access to it ... FordExplorer 2000 intake manifold gasket upper lower P0174 by froggy - Duration: 36:54. by froggy 36,588 views ... Ford Explorer 4.0L SOHC Rough Idle P0171 P0174 Lean Codes ...

Putting the lower intake on my 1997 Ford Explorer 4.0 OHV ...

? 5:23
https://www.youtube.com/watch?v=qKE1vPxqPHs
Jun 27, 2010 - Uploaded by origionaldz
Putting the lower intake on my 1997 Ford Explorer 4.0 OHV sport .... I do have a 2000 5.0 ... @michaelheiland123654 To dothis job, you have to remove the alternator, unbolt the AC compressor, remove upper intake manifold, remove fuel rail,remove all injectors, ... Do you have the SOHC or OHV version?

1999 Ford Explorer 4.0L -need assistance on removing upper intake ...

www.automotiveforums.com > ... > Ford > Explorer ' Explorer Sport Trac

Sep 20, 2011 - 1999 Ford Explorer 4.0L -need assistance on removing upper intake ...Are you sure you have the OHV/pushrod engine and not the SOHC engine? ... Do youhave the upper intake manifold loose, you just are unable to ... the lower intake gasket, valve cover gaskets, Injector o-rings, plugs and wires. Thanks ...

How to replace upper intake manifold gaskets - Ford Explorer

code p 0300 is random misfires ===causes ---plug/s--HT lead/s---injector/s---ignition coil/s---low compression ---wiring
replace the cat converters as they are important for proper engine tuning
the problem most likely is faulty injectors that over fuel , leak and need attention
you can fit a vacuum gauge into any vacuum hose to read the vacuum at idle ( 15 or deceleration from high rpms 25)
fluctuation reading at idle indicates problem valves

it is the o2 sensor in front of the cat converter jack up truck and support under truck locate ur cat converter do this with truck cold cat can burn skin very easily same with exhaust pipes .when locate converter follow pipe forward towards engine look toward top of exhaust pipe will see a small tube with wire connected this is problem sensor check wiring and connector un plug and remove replace than reconnect

DTC P1537 - Intake Manifold Runner Control IMRC maltfunction (Bank #1 stuck open)
Look down in the very back of the engine behind the intake manifold. You will see 2 linkages coming out of a box looking piece that has an electrical connection. Look at where the linkages hook up and see if the little white clips are broken or missing. This is typical. If all that looks ok, you may need the actual IMRC control--(Intake Manifold Runner Control); $150-200 range.

This it's located behind the upper intake manifold; actually bolted to the lower intake back by the firewall, it's not real easy to see. I would look at your vacuum lines on the intake manifold. I think it would be vacuum operated but I may be wrong. Anything on the manifold would be easy to fix and worth your time


DTC P0303 - Cylinder #3 Misfire
A code P0303 may mean that one or more of the following has happened:
Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer

Possible Solutions:
* If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
* If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.


Hope this helps.

2 O2 sensors and 2 catalytic converter efficiency monitors, they look like O2 sensors but are not, they are after the cat converters, the O2's are before the cat converters in the exhaust pipe of the engine exhaust manifolds

A P0303 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #3.

Symptoms may include:

• the engine may be harder to start
• the engine may stumble / stumble, and/or hesitate
• other symptoms may also be present

A code P0303 may mean that one or more of the following has happened:

• Faulty spark plug or wire
• Faulty coil (pack)
• Faulty oxygen sensor(s)
• Faulty fuel injector
• Burned exhaust valve
• Faulty catalytic converter(s)
• Running out of fuel
• Poor compression
• Defective computer

If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs).

Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced.

SOUND LIKE INTAKE LEAK.WHEN YOU HAVE A INTAKE LEAK THE PCM WILL RICHEN FUEL MIXTURE.MAKING CAR RUN RICH.CAUSING UNBURN GAS TO CATALYTIC CONVERTER CAUSES IT TO GET HOT BURN OUT.WHICH WILL DESTROY THE CONVERTER.HAVE CAR CHECK OUT FOR A LEAK IN THE INTAKE MANIFOLD.

CODE PO420 CATALTYLIC CONVERTER SYSTEM FAULT.ITS SAYING FAULTY CATALTYLIC CONVERTER.IF IT BEEN A WHILE IF YOUR CAR HAS A WHOLE LOT OF MILES ON IT.YOUR SPARK PLUG CHANGE IS DUE AT 120000 MILES. DUE A LITTLE TUNE UP CHANGE AIR FILTER AND FUEL FILTER.SEE IF YOU HAVE ANY ENGINE FAULTS BAD PLUGS DIRTY INJECTORS ANY THING UP SET FUEL SYSTEM CAUSE CAR TO RUN RICH.EXCESSIVE UNBURN FUEL WILL GATHER IN CATALYTIC CONVERTER CAUSE IT TO BURN OUT.SHORTING LIFE OF THE CATALYTIC CONVERTER.

Look, man here is the deal:
code p0174 - refer to the front cylinder bank
code p0171 - refer to the rear cylinder bank