p71 wont start

[goody54]

help!! i have a 2000 p71 i have gas pressure and still no start,,looked for fusable links that may have burnt but cant find any anywhere.tested fuel pump and all is working fine. i dont think im getting spark any ideas as to what could be causing this and what i can do to test or fix this would be very helpful. thanks

[peppermrj]

First check for spark. Check your ignition fuses. What type of ignition system? Two coils or eight?

[peppermrj]

Here is a link to an ignition system for a 98. It will give you an idea of the components involved if it is not your exact setup. Post back.
http://www1.autozone.com/servlet/UiB...3d80172632.jsp

[goody54]

Originally Posted by peppermrj

First check for spark. Check your ignition fuses. What type of ignition system? Two coils or eight?

i have the 8 coil pack system,,,,checked all fuses and all are ok....couldnt find all fusable links to see if that was it

[peppermrj]

Do you have spark? Check several plugs.

[p71]

i'm having that sort of issues 2. i had 3 bad coil packs. still have a rough running motor. checked EVERYTHING! i have a 2000 cvic p71 with 195k. peppermrj; what is the truth on the learning curve of the pcm? it has been hard reset. how many miles for it to learn?

[p71]

i also have a 2000 p71 vic. had 3 bad coil packs. still not running smooth. checked everything, replaced iac/harness/filters/pump/3 coils/plugs. have p0453 code-evap ecs press sensor high?? any help?? can't figure out where it is.

[peppermrj]

Originally Posted by p71

i'm having that sort of issues 2. i had 3 bad coil packs. still have a rough running motor. checked EVERYTHING! i have a 2000 cvic p71 with 195k. peppermrj; what is the truth on the learning curve of the pcm? it has been hard reset. how many miles for it to learn?

Wish I knew for sure. It does take some time tho. There are several cylces it must go thru. Have you cleaned/checked your EGR?

[p71]

not yet. did pull the egr valve. it was ok. used lots of cleaner on tb, etc. has a backfire when floored while driving. only when kicked down/ high rpm. idles rough, but consistent. no stalling. i'm worried about injectors. a pain to check. last resort.

[Stevo2]

Originally Posted by p71

not yet. did pull the egr valve. it was ok. used lots of cleaner on tb, etc. has a backfire when floored while driving. only when kicked down/ high rpm. idles rough, but consistent. no stalling. i'm worried about injectors. a pain to check. last resort.

Have you pulled the error codes off the computer? Try running a can of SeaFoam throught the engine/gas tank it's worth the $6. Can get it at NAPA/Carquest. www.seafoamsales.com

[p71]

the only code left is p0453. don't know what or where it is. cleaned injector/fuel system well, and changed all filters & pump. coils/plugs too.iac is new. even gave it a bath and a hug. still no improvement.

[p71]

update: after a week of driving(200+ miles) still not much better. a little maybe. does not backfire now. i'm still suspecting weak coils. perhaps a thermal breakdown? still only the above fault code. still don't know what it is. even tried a different set of mufflers. no difference. my cats are hollow. now runs fair under harsh acceleration, but poor idle. ideas??

[mtmaurer8ooo]

FYI - I don't know if you know p71, but your P0453 code says Fuel Tank Pressure Signal circuit Input above maximum. I don't know exactly what that translates too but it sounds to me like you may have some evap system problems. Check the evap canister vent solenoid(purge valve)...it may be malfunctioning. Also, I don't know too much about these crown vics but its my understanding that they do have some issues w/ intake gaskets, so she may be sucking air also. Just a couple things to check out. Let us know what you find. M

[cobradude360]

have u tryed a mass airflow clean ans also the seafoam is an awsome product ive used it in my cars plus friends cars its awsome heres some links
http://www.lincolnsonline.com/tech/00151.html
http://www.lincolnsonline.com/tech/00059.html

[p71]

HERE'S THE "ACTRON" DEFINITION OF THE CODE p0453:
"EVAP EMISSION CONTROL SYSTEM PRES SENSOR HIGH"

between that and yours, it seems to point to the sensor's reading being too high. ...or is that "ford" for a high supply voltage to the sensor...or is that a logic high when the pcm expects a logic low/voltage below x volts????

i did fix the connector on the module under the tank. it had been ripped off. had some other code with that; but after i fixed it, code went away. this one was there all along.
any tips for the purge valve testing/cleaning? i'm not familiar with doing that. i am gathering that it is the module under the trunk.
i have not thoroughly cleaned the maf yet, but will today. can't find any air leaks or vacum issues.
why don't fords come with ctrl/alt/del??