4.6L engine swap problems

car is a 92 town car, the donor engine came from a 94 crown vic both 4.6 engines, now the car won't start... not getting spark neither gas, fuel pump doesn't seem to be coming on, checked all connections everything seems to be fine.... computer may not be getting any power... if anybody knows specifically where the power connector is for the computer I'd appreciated it... thanks

yes all the fuses are good... computer was swapped out with the computer from the crown vic and no luck.. so the lincoln computer was returned

Can you pull trouble codes from the computer? Sometimes a cam or crank sensor gets bumped/damaged/disconnected when doing an engine swap. I'm not TOTALLY up to snuff on the engine management logic of the 92 lincoln. I think it's an EEC-IV system, and if it's missing a cam sensor signal it won't provide ignition or fuel.

The 94 donor engine may have had the EEC-V PCM. I don't know if it's sensor signals are different from the sensors on an EEC-IV engine.....

Good luck.

Don't forget to check those damn power relays:

http://www.automotiveforums.com/vbulletin/showpost.php?p=4227240&postcount=18

Correct me if im incorrect but didn't some 92 have the new Body style but a 5.0 in it. I would check and see if the fuel is getting up there, spark, Im not so sure about hooking that up to a computer to scan it...I believe some of the 92s you couldnt scan it.

poke the shrader valve (however you spell it) to see if your getting any gas. it should squirt out like a fountain. no spark could be crankshaft position sensor or camshaft position sensor. check your coil packs too to see if you get a spark. disconnect the spark plugs from the coil packs and see if they spark at all. the ECC-V PCM were not put in until late 94. so if the crown vic was manufactured after id say like july or august of 94, then it probably has the ECC-V PCM. you would have to double check with your local dealer on that one im not 100% sure. i know all the cars in 95 had the ECC-V PCM. the computer has to be compatable with the engine.

hflyboy... i tried to get a scan tool but none of the local autozones or auto parts stores have them to loan and im not going to buy one either, however the service engine light does not come on when the ignition is turned on so im thinking the computer isin't getting any power

towncar... i swapped the relay for the fuel pump and the ecc with no luck, i would doubt both were bad since they worked previously

wasabiboys... it isin't getting fuel the fuel pump is not coming on, i believe its not coming on since the computer doesn't seem to be getting power

sreilly77... i believe you have the answer to the problem.. the camshaft sproket was cracked in half from the accident, we replaced the sprocket and put the timing chain back on, however the camshaft and crankshaft wasn't lined up correctly, i just realised this after we got the engine back in the car... could the camshaft being off prevent cause the computer from powering the fuel pump??? I know it controls the fuel pump, but wouldn't it just not allowed the ignition to fire, not necessarily non-power the fuel pump??? thanks I believe this is the problem.

hflyboy... i tried to get a scan tool but none of the local autozones or auto parts stores have them to loan and im not going to buy one either, however the service engine light does not come on when the ignition is turned on so im thinking the computer isin't getting any power

towncar... i swapped the relay for the fuel pump and the ecc with no luck, i would doubt both were bad since they worked previously

wasabiboys... it isin't getting fuel the fuel pump is not coming on, i believe its not coming on since the computer doesn't seem to be getting power

sreilly77... i believe you have the answer to the problem.. the camshaft sproket was cracked in half from the accident, we replaced the sprocket and put the timing chain back on, however the camshaft and crankshaft wasn't lined up correctly, i just realised this after we got the engine back in the car... could the camshaft being off prevent cause the computer from powering the fuel pump??? I know it controls the fuel pump, but wouldn't it just not allowed the ignition to fire, not necessarily non-power the fuel pump??? thanks I believe this is the problem.

it is a possibility however i dont think so. when my camshaft position sensor went bad my fuel pump still powered up after turning the key to run and hearing the noise come from the back and also poking at the shrader valve on top of the injector assembly and it squirted gas like a geiser. try poking the shrader valve with some small with the key on RUN. tell me if gas shoots up. if it just trickles out, then you are not getting any fuel to the engine. that is just the fuel left in the lines. however, if it squirts really hard, then fuel is going to the engine and fuel pump is operating. check that first and then we'll figure it out from there.

can do.. i didn't really check if the engine was getting fuel since I couldn't hear the pump come on but i'll check... hopefully i can get to a scan tool and see if the computer is powering up.. i really do believe the computer isin't coming on... i'll try as soon as i can will post back

oh btw does anybody know the difference between the crown vic ecu and the lincoln ecu?? they have different part numbers.. im just thinking the ecu on the lincoln has more features than the vic since it has an all digital cluster and everything


i did swap out the ecu's but it didn't do anything different so i put the original lincoln computer back in

poked the shrader valve and nothing not even a single skeet.. i got a hold of a scan tool.. when i turn the ignition to run the scan tool makes a solid beep noise... so im thinking the computer isin't getting power... and help is greatly appreciated.. nobody wouldn't happen to know where the main power connector is for the computer?? also their wouldn't happen to be a fuseable link anywhere??

Hello


If you are still not geting fuel, check that fuel pump shut off switch in the trunk. It's on the drivers side, the slightest bump in the right spot and that switch can get triggered.

MIKE:2cents:

thanks mike but the fuel pump switch is good, the relay for the fuel pump is not getting any power... i think the computer controls the fuel pump relay and im not getting any service engine light during initial tests

if anybody knows where the ecu gets power from please let me know

poked the shrader valve and nothing not even a single skeet.. i got a hold of a scan tool.. when i turn the ignition to run the scan tool makes a solid beep noise... so im thinking the computer isin't getting power... and help is greatly appreciated.. nobody wouldn't happen to know where the main power connector is for the computer?? also their wouldn't happen to be a fuseable link anywhere??

if the shrader valve isnt spewing gas like a geiser when the key is in the ON position, your fuel pump is shot. heres a little trick you can try to verify if your fuel pump is bad or not. grab a rubber mallet, crawl under the back of your car and towards the front of the gas tank, tap it with a gentle to a moderate force: id say may be 4 or 5 taps. do this when the key is on OFF. then try and start it. if it doesnt start, turn to key to OFF and try tapping the gas tank again. if after 4 or 5 reps of tapping and the car still doesn't start, then we will move on to the next step. let me know how you make out.

Ok, so check that fuel pump switch off the list. Ok so the starter cranks the engine but nothing seems to be powering up, right? Sounds like you need some good wiring diagrams, Steve should know a good link to find those.

I just thought of another quick thing to try. Check your main connector, where the engine harness plugs into the car harness. It's located just under the brake booster, and has a black plastic shroud covering it. I swaped engines in my 91 TC the donner car was a 92 Grand Marquis. I know that these little bugs can drive a person crazy.

Just curious,what was wrong with your Lincoln engine? Was it the rear bearing that spun locking up the motor like mine? The knuckle head who previously owned my car ran it low on oil several times. I bought another TC with the same problem, the motor is locked up. I pulled the engine out but havent took the pan off yet to check things out. I suspect it's the same issue there is no oil left in that engine.

Mike

...Steve should know a good link to find those...

Can't find a wire diagram anywhere for the 1992. My 92 iso is corrupted or something, I can't mount it. There's always that pay $13 service I posted in the non-specific section :(

PS: Dereck at LOL (http://www.lincolnsonline.com/forum/forumdisplay.php?f=261) knows all this electrical stuff very well.

can some one verify wheather or not the fuel pump is controlled by the ecu? I know on my chevy beretta with the computer disconnected the fuel pump will not come on...

fuel is not the problem, my problem lies in the ecu... i can not get the service engine light to come on during initial start up... i need the service engine light... i checked the connection at the ecu harness and all is well.. i also bussed out the dmm and checked to see if the harness was getting power and it was... im kind of thinking that the ecu may be shot.. im going to try to locate a replacement at my aunts salvage yard and see if that works... hopefully i can get this dam car going

...my aunts salvage yard...


Wow, we all need one of those Aunts :)

lol yeah she comes in handy i get any part i need free

Can you verify that the ecm has a valid ground? The ground is as important as the power circuit, and the ecm controls the fuel pump by grounding the fuel pump relay. Sometimes it's easy to overlook putting all the ground wires back after an "enginectomy".

Can you verify that the ecm has a valid ground? The ground is as important as the power circuit, and the ecm controls the fuel pump by grounding the fuel pump relay. Sometimes it's easy to overlook putting all the ground wires back after an "enginectomy".

you are good.... thats EXACTLY what i was thinking... you wouldn't happen to know where it is grounded would you?

There are some grounds that I know of located behind the kick panels on either side. I believe there is a green screw used to fasten them. There is also one under the hood. It goes from the passenger side cylinder head to the fire wall. The tab on the firewall is right on top and easy see. :2cents:

Mike

I have a 1999 Navigator, and with the caveat that the PCM pin assignments may be different, I can provide the following information from my service literature. Please understand that I don't know these assignments to be the same on the TC!

PCM pins 3, 51, 77, 103 are all power grounds.

PCM pins 71 and 97 are both vehicle power (batt. voltage)

PCM pin 55 is Keep alive power

PCM pin 25 is the PCM case ground

PCM pin 80 is the fuel pump relay control.

Good luck...

yeah i don't think its the same.. on the town car they only have 60 pins

oops...not much help there. Sorry!
On some earlier 60 pin ECMs the following pin assignments apply:

Pin 1 = keep alive power
Pin 17 = check engine light
Pin 20 = case ground
Pin 22 = Fuel pump relay control
Pin 37 = vehicle (battery) power
Pin 40 = Power Ground
Pin 60 = Powe Ground

I've lost my 4.6 liter TC book....the data above is applicable to the EEC-IV ECMs.

fixed the computer prob now have another problem

http://www.automotiveforums.com/vbulletin/showthread.php?t=613468

Go to the relay center you have two relays an eec relay which powers the computer and the fuel pump relay which powers the fuel pump. You probably left a ground loose. Their should be a ground by the computer . Did you hook up the grounds for the engine and computer system. I would go over your work as I'm almost certain you didn't connect a ground somewhere. They used to have the eec relay and computer ground in right kick panel. Fuel pump ground center of trunk. Fuel pump relay in trunk by hinge. Then they went to a relay center in the engine compartment.