Urgent help! CEL on and cannot find any answers!

joshjwc9 · Nov 22, 2008

hotcobra03 said:
1st ck rear o2 blue must be in driverside.just look

I will in the morning, it is dark here now and the car will be up to do the Mach 1 brake install.

hotcobra03 · Nov 22, 2008

You did put cop on driverside front?to speed po 1000 .step 11 from a stop accel to 65mpg than coast down no brake to 40 mpg than stop .repeat 3 times that resets misfire and fuel montors.the purpose of drive cycle procedure is this allows learning for misfire monitor.when you watch o2s 0 to 0.45 is lean less fuel 0.45 to 1.0 is rich.you will also c long 1 and 2 .short 1 and 2. Thats fuel trim.it will try to balance 0.your o2s control trim you are watching o2 21 lf 22 lr .11 rtfront 12 rr. Watch all 4 it will take awhile to understand dont sweat it.wish i had my house computer i can post all this from ford disc.

02nightmaregt · Nov 22, 2008

^What did you just say?

hotcobra03 · Nov 22, 2008

What drivecycle.if so yes your pcm does that every time u reset pcm po 1000 .your pcm does a 14 sets that resets many thing.can anyone post it im on a cell

hotcobra03 · Nov 22, 2008

What drivecycle.if so yes your pcm does that every time u reset pcm po 1000 .your pcm does a 14 sets that resets many thing.can anyone post it im on a cell.

hotcobra03 · Nov 22, 2008

Also he just had trans out.causes for po420 front o2 and are rear o2 wires crossed.among others.

joshjwc9 · Nov 22, 2008

I replaced coil on 2nd cylinder in on passenger side, coil B is first cylinder on driver closest to radiator? Take your time, I will check the o2 sensors tomorrow...thanks for your help.

hotcobra03 · Nov 23, 2008

Quick ck ? How new are plugs? Did you pull cyl 2 plug ?2nd back on passenger side.what is the gap?plug 4 cop has a red wire thats is hot when key is on?the other is pink with white stripe.ck colors on rear o2s?this is strange no misfire code and no cats with code 4 cats.you got 1 reply 4 spark plug and 1 for front o2 and i asked if rear plugs are crossed?ok when trans was unbolted did you pull wire harness or force hand behind valve cover?the wires are tiny maybe a problem their?with a multimeter you can ck circuit .the big plug at the end with bolt .pin 41 is pk/wh. I also use a predator .suck thier manual is like a chiltons.useless.these do everything when you learn .im just starting to understand what im watching .so many numbers have fun

joshjwc9 · Nov 23, 2008

Plug was good, and o2's were good.

Got brakes on and took it around the block, I also reset the PCM by disconnecting the battery.

I will see tomorrow on my way to work in the morning if this helps, if not I will have my mechanic look at it.

hotcobra03 · Nov 23, 2008

I will 4 more dumb stuff pin test was other choice.i will assume it had misfire codes just bored

poindexternasty · Nov 24, 2008

Swap upstream o2 sensors

hotcobra03 · Nov 25, 2008

Any update?while reading sounds like you werent the one who did trans.dumb stuff checklist p420 and 352@ect sensor,ckp sensor,dpfegr,egr,o2s,fuel pressure,injector,clogged muffler .with tuner c if o2s are switching and volts.watch engind temp.watch dpfegr.watch fuel pressure and spark advanced.look at it first its cheaper than mechanic and helps for next time

joshjwc9 · Nov 25, 2008

Sorry I've been really caught up with work and school, being a college student isn't as fun as some of it have experienced!

Quick update, I was frustrated and put the car back to stock, and disconnected the battery and let it sit overnight, I start the car Monday morning with no check engine light, drive to work and CEL comes on except with codes for rear cats which I dont have. So I clear them and install my Diablo tune and the car has been perfect since lunch monday, with no codes or any misses.

I dont know what the issue was, but it has cleared up, I screwed with every wire on each COP and even disconnected ones when the car was running to no avail, did the extreme weather changes here effect my car???

joshjwc9 · Nov 26, 2008

NEw update, the CEL popped on my way to work, and I cleared it on my way home, and it didnt come on again. The car is frustrating me, and I watched the o2 sensors on the way home.

It showed o2 22
o2 11
02 21

Is there supposed to be a fourth in the display??

hotcobra03 · Nov 26, 2008

Your lite is coming on fast which is a hard fault. 352 again?you are going to have to ck the harness 4 a short ,pinched wire.u need a multimeter any cheap one will do.it is not that hard to do.with pred look at fuel trim long and short.and others iat tps ect they all work together.go into gas fuel o2s are their the longlist htr 11switching.. o2s11 0.0 to .45 is lean .45 to 1.0 is rich. Over 1.0 is bad o2.neg on long1 is rich pos values are lean.record numbers .

joshjwc9 · Nov 26, 2008

It did not come on for about 150 miles of driving since the reinstall of the Diablo tune. I will watch the predator tomorrow on my way to eat.

joshjwc9 · Nov 26, 2008

I was watching the o2's on my way home and 22 and 11 were balancing to one, neither one was going over 1.0 if I can remember, but there were 3 o2's listed in the section shouldn't there be a fourth o2 on that list???

hotcobra03 · Nov 30, 2008

Sounds like bad o2s from what ive been reading 1.0 is max 1.5 is max for the o2 . 11 rf 21 lf.12 is purple plug rr and 22 is blue plug. Do you have rear mil installed?i have or pipe and had to put it back to stock with rears on and no cats.what is your fuel trim? That is next.as to o2s scroll thru all look for o2s11 12 21 22.than ho2s11 h is for heaters they go on/off.o2s work with fuel trim.trim should balance zero. What your trim is doing will point you in direction of fault

hotcobra03 · Nov 30, 2008

Also i think when reading that when rear o2s are off with predator that the heaters also need to be off. When off they should be 1.0v but be stuck thier.code 420 involves front and rear o2 signals.anything strange to happen here would make a change to fuel pulse rate which could tie into 352code. Long shot maybe .reading fuel trim with pred you might have to rev up to get numbers moving .bank 1 and 2 should be switching pos to neg. But not the same numbers at the same time .

joshjwc9 · Nov 30, 2008

Code 420 hasn't popped on since the exhaust leak was fixed, it is sticking to p0352, I have played with it this weekend, and I will be changing to motocraft plugs Monday, and if the plugs dont fix it my mechanic will take a looksie...this is frustrating me...

Urgent help! CEL on and cannot find any answers!

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