Where is the EEC located in a 94 F150, 4.9l? In the fender or in the firewall.


Thanks

 

firewall, below the brake booster.

 

Do you remove it on the firewall side or from the kick panel in the cab?

 

it is in the engine compartment, so it comes out that way.

you need to disconnect batt. first!

the back of the plastic fender has to be unbolted.

why are you messing with the computer?

 

Do you remove it on the firewall side or from the kick panel in the cab?

 

answered twice already: engine/firewall side!

 

My sons truck, it is several hundred miles away, so I work on it when I can..it died a few months ago. No Spark, checked the coil, changed cap and rotor, AutoZone checked the ignition module. At some point we noticed that the fuel pump was not running either so I changed tactics and checked the EEC relay, replaced it no change, I can feel/hear the relay engaging. Just for GPs i pulled both the EEC and fuel pump relay and jumpered accross. The fuel pump started humming but still no ignition. any ideas?


Thanks

 

sorry for the double post, i refreshed the page, guess it reposted

 

I suspect the PIP(profile ignition pickup) inside the distributor has died. I would pull the distributor and take it to a Ford dealer, they can check to see if the PIP is bad before disassembling the distributor to replace the PIP. And I don't recommend a rebuilt distributor, I have learned from these forums that rebuilt distributors are, for the most part, JUNK.

 

But would the PiP cause the fuel pump relay not to engage?

 

I don't think so.

 

don't trust autozone parts or advice.

read codes.

how did you check coil?

replace relays, do not jump them.

is fuel pump on for a couple of seconds? or does it stay on?

also, why did it die? exactly what happened. why so long to get to it?

 

Read codes on the OBD connection in the cab?

I checked the coil by checking voltage with a DMM on the Red/Lt Green wire and the Tan/Yellow wire...battery level voltage on both

Fuel pump stays on when I jumpered the relay

I was not there when it broke, my son said he was driving it and it died on the road

My son is away at college and i just have not had the time to get to it since it is 3 hours away. I have been down there several times but have not had any success.

thanks

 

even though you can read the codes by jumping the connector, i would use a code reader.

the connectors are in the engine compartment, obd I.

get a manual if you do not have one already.

replace the relays and see if the pump stays running with the key on.

 

The timing signal from the distributor is what the computer uses to determine if the engine is running and when to turn on the fuel pump. Does the fuel pump run for a couple seconds after turning the key to "run" or does it not run at all? If you ground the fuel pump wire in the diagnostic connector, that will force the fuel pump relay to energize, which will tell you if the fuel pump relay is working properly.

Here is a link that shows how to get the codes with a paperclip - just leave out the voltmeter/test light and watch the check engine light blink: EEC IV Self Test hookup . I believe the fuel pump wire is #6 in the diagram on the linked page.