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p0351 for no reason? need it gone to pass emissions tomorrow...

K

KAOS_3.0

Hard-core CEG'er
Joined
May 16, 2008
Messages
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SE / CLT,NC / ATL,GA
so I needed to pass emissions and when I put the car through the ford recommended drive cycle it stored a p0351, and it still didn't clear the p1000...

I dont have any time left on my ten day emissions permit and I'm wondering one of two things:

1: will the p0351 cause me to fail if it hasn't lit the cel?

2: if I will fail because of it, what should I do next? theres no reson for this code to be there, the car runs fine and I have no idea why it stored. I also have no idea why the p1000 is still there after running it through the drive cycle twice...

I've messed with it to the point I have no option but to post up a question, and searches also yield nothing relevant...

I need this thing to pass emissions tomorrow or I'm going to have serious issues with the dmv. their sorta pissed I let the tag lapse 3 months...

(back in the day, I'd routinely let the contour lapse for three months and then get a new tag and not have to mess with emissions, but Bev Perdue decided to toughen up the emissions laws here in NC... thanks democratic governor!)

any hasty input would be awesome, I'm out of ideas... thanks!
 
yeah, I can drive around for a year and not clear the p1000, thats why I put it through the drive cycle, and it didn't work, but it did apparently run a bunch of meters before it stored the p0351...

will the p0351 stop it from running further meters?

what meters does an emissions station check? would they even see the p0351? could the p0351 have kept it from running and important meter?

I don't' exactly have the time or gas money to go driving it thousands of miles right now, plus I'm on an expired tag with a little piece of paper that says I can drive it till tomorrow...

getting pulled over sort of screws the drive cycle up, lol
 
ok, well I just ran it through the misfire monitor repair verification drive cycle 3 more times, checking with my xcal in between every run, and it's still there.

the misfire moniter drive cycle is as follows: 11. From a stop, accelerate to 104 Km/h (65 MPH). Decelerate at closed throttle until 64 Km/h (40 MPH) (no brakes). Repeat this 3 times.

I tried it with differnt RPMS in different gear for all three pulls, still doesnt seem to be working...

ps: I'm going to get a speeding ticket trying to clear this code. not a lot of places you can legaly hit 65 and then let out of the gas till your at 40, and then repeat two more times. especially since it wants you to go from a stop...
 
why don't you check your state laws for what will and will not pass emissions testing? I mean really ... how are we suppose to know the exact laws in your state? :rolleyes:


P1000 means all the self tests have not run. Have a tune that keeps the car in open-loop and the P1000 will not go away.
 
I know p1000 means meters not complete, but I didn't know it could be caused by the tune.

as for the state laws, they are very vague so as to make everyone err on the conservative side out of fear. not a single place has listed a break down of what meters have to be completed in order for it to pass, and no one mentions if a stored code could cause it to fail. all they talk about are check engine lights.

what I need to find is if there are forums where diagnostic techs talk about local law changes or something like that...
 
Just take it to an emissions place and have them do it. If it fails I think you get a free re-test. I know here in GA you do.
 
I know I can have two codes not ready, but with the p1000, I have no idea how many arent ready.

also, what about the p0351 I have stored? will a stored ignition system DTC cause me to fail if it hasn't lit the CEL? if it will, then is the idea just to clear my DTC's again and then put it back through the drive cycle again, but just one time and then take it up to the emissions place?
 
have you tried swapping #1 cop coil to another plug and seeing if the code follows it ? ..... you might just need a new cop coil .... G.
 
KAOS_3.0 said:
I dont have COP, I have a normal waste spark coil pack.....
Click to expand...

oh, my dtc code list says COP.

assuming that the misfire on cyl 1 code for cop and waste spark are the same ..... have you tried swapping spark plugs or wires between cylinders to see if the misfire code follows the swapped hardware ? ... G.

p.s. change 1 item at a time .
 
there's no misfire. p0351 is a code for coil circuit failure, like a grounded coil driver from the pcm. problem is, the engine runs fine, no miss at all. it's an erroneous code...

besides, the 1 in the code wouldn't indicate cylinder 1, because it's waste-spark. there are only three coils.
p0351 could be cylinder 1 or 5, p0352 could be cylinder 4 or 3, and p0353 could be cylinder 2 or 6...

it would be swell if I could trouble shoot this without having to remove the damn intake manifold, especially seeing how the engine runs fine all the way to the 7500rpm red-line and doesn't miss a step anywhere. this code hasn't been there ever before and I'm assuming it's a fluke. my only real question is how to I get it to run that meter again?

I get the feeling it doesn't know its being put through the drive cycle unless everything happens in order. but then again, if I run the whole drive cycle again, I have to wait 8 hours before I can run it through it again. so my dilemma is: should I clear my dtc's first, or give it a go without clearing them and hope p0351 just rechecks and goes away?

edit: BTW, misfire on cylinder 1 would be p0301, cyl 2 would be p0302 and so on...
 
KAOS_3.0 said:
there's no misfire. p0351 is a code for coil circuit failure, like a grounded coil driver from the pcm. problem is, the engine runs fine, no miss at all. it's an erroneous code...
Click to expand...

ok did a bit more reading and I found another possible item check.

Apparently the crank sensor is part of the monitoring circuit associated with the p0351 code.

Is the harness to the sensor in good condition, tight fitting and clean ? Do you have a spare sensor to swap out ? ... G.

p.s. I know this code is annoying but it may not be erroneous.

It could be that the incomplete p0351 test is what is keeping up the p1000.

Interesting that it's asking you to do specific speeds as part of the test cycle ... suggests a speed sensor is being interrogated during the test.
 
the entire ford drive cycle is speed related. I'm not sure if it's actually looking at the VSS or if that is just a way for it to put the engine through different loads. it's a bit confusing though sincw the don't mention what gears to make these pulls in. then again, it would seem they assume you have an automatic, based on the fact that this appears:

"CCM (Trans) -- 10. For M/T, accelerate from 0 to 80 Km/h (o to 50 MPH), continue to step 11. For A/T, from a stop and in overdrive, moderately accelerate to 80 Km/h (50 MPH) and cruise for at least 15 seconds. Stop vehicle and repeat without overdrive to 64 Km/h (40 MPH) cruising for at least 30 seconds. While at 64 Km/h (40 MPH) , activate overdrive and accelerate to 80 Km/h (50 MPH) and cruise for at least 15 seconds. Stop for at least 20 seconds and repeat step 10 five times.-- Executes the transmission portion of the CCM."

so it would seem that for the most part, they assume all vehicles are automatics....

I could check the CKP, but I dont see how it could be acting up, especially with the engine working perfectly. a bad CKP would cause the car to do silly things like not even start...

thats why so many tools mess up their 3.0 swaps by not flipping the timing wheel. the engine gathers it's ignition timing from that little sensor. then the CMP's tell it when to supply fuel...
 
ok; well if you can elliminate the crank sensor that's good.

remember; the codes are an indicator of the symptom ... you have to then sort out which component/malfunction is giving you the symptom. Can drive you nuts I know.

I'm having fun with my car right now ... it refuses to start.. it cranks and very nearly starts ... but no grrrrrr, I so want to hear the vortec whistle into life ..... G.
 
if your still running 19lb injectors, you may not begetting enough fuel, even with a tuned PCM. the 19lb injectors run around 100% duty cycle just fueling a normally aspirated 3.0.

that means they are basically just open all the time, spraying fuel like old mechanical fuel injection...
 
the vortec is venting to atmosphere.

I had to bolt it up before the engine went back in, I'm going one step at a time, running engine and tranny in first.

How did you get on with the crank sensor check. ? ....... G.
 
took it out, verified it's clean, jiggled the wiring, made sure it was snug, nothing seems to be out of the ordinary with it. I dont have another CKP to check against, so thats the best I could do.

it's acting like theres a short to the coil, but that requires stripping the intake manifold and I dont want to make anymore question marks in the equation while I'm trying to get it past emissions. besides, at this point, the ten day has expired so I'm going to have to tow the car to the emission place if I dont want a ticket.

driving in an erratic fashion with an expired tag is not a great idea...
 
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