Where egr hose needs to be connected to on ford ranger 2003 2.3l 4l. I found it's hooked up to water lines to the T connector ?

Second hose goes to egr valve

What connects the maf, iac, egr and o2s? The PCM - engine computer .

On some early model Fords require programming of the electrical parts. If I'm not mistaken, There is an electrical connector that plugs into the EGR. You can call the local Ford dealership and ask about it but I'm pretty sure that's what needs to be done. Had an early model Ford Ranger come into the shop work in and found that out the hard way. I hope this helps you on getting correction for the problem at hand. Have a great wknd. Jesus loves you, John 3:16-17 (KJV)

1999 Ford Ranger Vacuum hose diagram
Pamela, Normally vacuum line routing can be found under the hood of truck, on Rad support or on the underside of hood. Check the attached links,instruction and guides, Good luck
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Ford Ranger Engine Vacuum Hose Diagrams
Vacuum Lines The Ranger Station Forums
Repair Guides Vacuum Diagrams Vacuum Diagrams AutoZone com

Throttle Position/MAF/Sensor. I would check these. Probably Throttle Position asensor. May be EGR as well.

Hope this helps, good luck. -

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..

P0402 is "EGR FLow Excessive Detected". The possible cause are a bad DPF EGR sensor, a bad EGRVR solenoid or possibly a bad PCM. The first thing to check is the wiring for breaks and be sure the connectors are clean and tight. Also check the vacuum lines for proper routing and that there are no breaks or cracks in them. I hope this helps and good luck.
Please remember to vote if this was a help in any way. Thanks.

The egr valve has two sensors. One is an EGR position sensor which is physically attached to the EGR valve. The other sensor is the DPFE (Delta Pressure Feedback EGR) sensor, commonly called the EGR pressure sensor. It's location varies depending on the engine you have. You can fine this sensor by following the vacuum hose on the EGR valve. It will be with in inches of the EGR valve. The sensor will be black (plastic) or silver (metal), have two or three vacuum ports and an electrical connection on it.

The vacuum pressure sensor is a high failure item on fords. Any Ford parts department will have one in stock, as well as some aftermarket parts stores.

The new sensor may not look exactly the same as the old part, but will have all the hook ups as the old one. You may also need to replace the vacuum hose to the sensor as well

Either the vacuum supply to the DPFE (Delta Pressure Feedback EGR) sensor has been compromised due to a disconnected or broken vacuum line, the electrical connection to the DPFE sensor has come off, or the DPFE sensor itself has gone bad. The sensors are such a high fail item that they are now available at aftermarket venues like NAPA and Auto-Zone.

Check your connection, if it's tight, check the vacuum hoses. There will be two or three depending on the style of your sensor. Regardless of the count, there will only be about a foot of hose to check. If the hose is bad, it will obviously need to be replaced, but it can't be standard vacuum/washer solvent hose due to the application. Your friendly Ford dealer has the hose in bulk. It a silicone compound type hose to better resist the heat. I

f the hose is OK, then the DPFE needs to be replaced. Prepare to shell out around $80 to $100 depending on your particular application. If the new one looks different than the old one, it's OK as long as it has the same number of vacuum ports and the electrical connector is the same.