Lets try and make some sense of this -

Problem - Car sputters and bogs after about 3K rpms. At first I thought it had something to do with fuel or A/F. I then went ahead and changed my spark plugs just to be sure and went ahead and tuned her with WB and the VAFC to no avail. Once it hit 3K the car just boggles down well more like a very un-smooth acceleration with no power. Now here is the thing before 3K it runs like a champ.
Another possibility was coils but I checked the codes and the codes I got were

Post notes
P1336 which somehow the actron scanner says its a misfire code but the .org say its a CKPS which I think it might be because some people report of no smoothness after 3K rpms.

P0100 MAF but I caused this one because I unpluged the MAF just to check maybe the MAF could be culprit.

Well tell me what yall think. Let me know if you need some extra information.

Thanks.

 

Coils injectors can also cause the misfire. If the MAF code is there doesn't the ECU go into limp mode? Try clearing the code and running it again.

Try this to look up the code Thanks to pmohr for this http://boredmder.com/ecucodes/

 

Clear the codes, see which come back.

If you still get a CKPS POS code, first check the connectors, test the sensor and harness, then replace it. I've got one for sale

 

pmohr - I might need it. I will keep you posted if i do. Do you also have the harness by any chance. How much are you looking for it? Just in case BTW. lol.

Maxim@kid - The MAF code was caused by me because i was trying to just trouble shoot as to what the issue could be. And as for the coils i thought about it but if they were bad would i get bogging through the entire rpm range not just from 3K..

 

I had a bad injector that was my misfire and it only bogged from like 3-4k randomly. As for the MAF I was asking when the ECU throws the code doesn't it trigger it to go into limp mode and stay that way even if you plugged the MAF back in?

 

Yep it goes into Limp mode. You are right. When it does tho, the AF is at 10 idle, normal is about 14.7. When you try and gas the car just the tinniest bit the AF dip right to the 9's and at that point I cant even read them anymore. When yo plug it back in and run the car the AF starts to even itself out. I have the run file from last nite to show you exactly what I mean you would have to download the zeitronix software.

 

My guess would be coil pack issue. Seems when they go bad, or start to, acceleration is greatly affected. I think if it were a CKPS (REF) sensor, the car might start, but would likely not continue to run. Have you cleaned the MAF? Compressed air and some carb cleaner, just don't disrupt the wire in there.

Does your program (Zeit) show a poor AF ratio, if so - when? Can you monitor while driving? Does it bog when in 'N' and revved to / past 3k? Any air leaks in the intake system tubing from the SC?

 

my guess is maf. When i had a maf issue, it would rev string to between 2500 and 3000 and would bog down. I'm willing to bet that that is yoiur culpert

 

OK update.. After I reset the ECU, I pulled the codes again today after the CEL went on and again it returned the code P1336. SO now I am starting to think that might be my problem. I read in another sticky that if i have a bad connection between the flywheel and CKPS the car will have an uneven idle.

I did check the MAF and usually with the MAF unplugged the car will run super rich i.e limp mode but this is different, the car still pulls but when you look at the WB graphs after the 3K the rpms are jagged and very unsmooth but they will still climb and my car is tuned at 12 for the AF for those who want to know.

 

Nope my AF is good. Same as I have had it for a long time. Just having a hard time climbing in RPMS. It doesnt bog when you rev after 3K in N. I will be taking the SC next week to add some stuff and new belts etc but so far I have no leaks.

 

Just check the ohm reading on the ckp sensors and see what you get.