How do i repair a cracked manifold on a ford ranger 2.0L with permatex

On the intake manifold,

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Is the leak under the dash ?

you may have a leak in the intake manifold which is acting like the throttle being open-look for a crack or loose bolts on the manifold to the head- cheers Denny

your controls for floor,vent.defrost ect. is in default mode due to a loss of vacuum.
you need to inspect vacuum lines for being lose cracked,or disconnected.hose will run from engine
intake manifold through firewall into the dash.i'd start at intake manifold looking for bad hose

It controls the length and speed of incoming air for a certain engine rpm to optimize swirl, efficiency, and minimize knocking.
Most likly you have a vacum leak
check all vacum lines to the intake manifold
check to see if the are cracked burned or just not hooked up
I hope this helps give me feed back and good luck.

The piece you are describing sounds like the thermostat housing. These housings are normally bolted to the manifold, so you can simply unbolt it. If it is cracked, you will need to replace it. If it is not, you can replace the gasket underneath it and reinstall it.

If the thermostat housing is leaking it could be a bad gasket, a cracked thermostat housing, or a crack in the intake manifold where its bolted on. Cheapest and easiest option would be to get a new gasket and a thin layer of blue permatex.

Ok.. The code P1400. Is. Related with the E.G.R system.
" Exaust Gas Recirculation"
The code P1400 is Exactly.
Sensor DPFEGR low voltage.
This code can set for.
Leaking up-strim pressure hose.
DPFEGR sensor Short to ground or signal return circuit.
VREF selenoid shorted to ground or signal return circuit.
Faulty DPFEGR .
or In the last case faulty PCM.

Ok.. The DPFEGR is a little box Located at the intake manifold.
to identificate See the Exaust Manifold Gasket you will see.
2 Little hoses Goin at the little box. When you found.
Check the hoses for cracked or damaged repair as need.
Check the connector.
The VREF. to locate follow the Little vaccum hose GREEN.
Goin to the EGR attached at the Intake manifold .
and check the connection.
If everything is OK. I recomend to replace the DPFEGR.

NOTE. If you don't have enought Expertise on vehicles.
I recomed to consult with your mechanic. and maybe give this information.
But if you can do your self go ahead.

I hope this help on your question. THANK YOU FOR USE FIXYA..

This year of ranger had a few flaws, In one case, a break power booster was robbing the vacumm, you can test this by plugging it off and seeing the differance, but you will have limited brakes. This model year had a problem with a vacuum leak on the manifold. You can check these in many ways, but please don't use starting fluid. The rear of the manifold usually on the drivers side where it seals to the block.
Also, in 2 other cases a cracked head has gave me the same problem. It is caused from a loss of vacuum.

if your obd2 scanner fits the connection you have obd2, obd1 connector is way differnt.

your code p1443
Control System
Canister Purge
Valve (Mechanical)
Malfunction
Monitors the fuel vapor
flow between the
engine intake manifold
and the EVAP
canister. The system
failure occurs when a
leak or blockage
between the intake
manifold, the EVAP
canister purge valve
and the EVAP canister
is detected by the
PCM.
l Pinched, blocked or
plugged fuel vapor
tubes/hoses (except
between fuel tank and
EVAP canister)
l Damaged EVAP
canister
l Disconnected, cracked
or cut fuel vapor
tubes/hoses (except
between fuel tank and
EVAP canister)
l Damaged EVAP
canister purge valve
Check for audible vacuum
noise in the engine
compartment or significant
fuel odor in the engine
compartment or near the
EVAP canister.

This link has all the codes you need.
http://rockledge.home.comcast.net/~rockledge/RangerPictureGallery/DTCs.pdf