Have you ever replaced the purge valve?

 

Ok Hoping someone might be able to give me some advise. I have a 2018 Focus ST 55k think i am stage 3. so when I get on it a little at random times between half and full throttle engine with start sputtering like its rich or maybe to lean. i have tried changing cobb tune I also have a Stratified tune. I even tried factory nothing changes. I had upgraded that throttle body to a mustang ecoboost throttle body, so thinking maybe it was bad i but factory back on and still nothing. i purchased colder plugs and but MSD coils on it changed sensor. Nothing. not sure what to do. took some logs but not experienced enough to know what i am looking at. ( wish i would have took some logs when running proper.) hoping someone might be able to help. thanks everyone.

Ok Hoping someone might be able to give me some advise. I have a 2018 Focus ST 55k think i am stage 3. so when I get on it a little at random times between half and full throttle engine with start sputtering like its rich or maybe to lean. i have tried changing cobb tune I also have a Stratified tune. I even tried factory nothing changes. I had upgraded that throttle body to a mustang ecoboost throttle body, so thinking maybe it was bad i but factory back on and still nothing. i purchased colder plugs and but MSD coils on it changed sensor. Nothing. not sure what to do. took some logs but not experienced enough to know what i am looking at. ( wish i would have took some logs when running proper.) hoping someone might be able to help. thanks everyone.

Have you ever replaced the purge valve?

I have not. not sure if this tells you anything but every now and then i will get a p1450 unable to bleed up fuel tank.

 

download log here:

https://pmdesignservices.com/log.csv

 

Replaced Purge Valve and still have issue. almost a year with this issue. Not sure what to try.. need someone to read these logs and tell me if they see anything. not even sure if its a rich or lean issue. Could the turbosmart blow off valve cause my issue..

 

Can you upload an actual .csv file, or upload to datazap and share here?

Your log is brief and when i try to open it it opens in adobe and is scattered across 37 pages.

 

datazap

what is that? I did but it on my web server. https://pmdesignservices.com/log.csv i can also put up a video of it so you can hear sound.

 

As theman said, the log was super brief and the only thing i see is it goes lean.

However, when it comes to a misfire, it will be represented as a lean condition to a wideband AFR sensor. Because when a cylinder misfires it does not use up the oxygen in combustion. That oxygen then leaves the cylinder and is read by the wideband.

I also noticed you trims were way negative under cruising conditions but im chalking that up to the failed purge valve that you have since replaced.

Those spark plugs you installed, what did you set the gap to? I dont want to know what their pre-gap is. Trust nobody. What did you set the gap to?

 

As theman said, the log was super brief and the only thing i see is it goes lean.

However, when it comes to a misfire, it will be represented as a lean condition to a wideband AFR sensor. Because when a cylinder misfires it does not use up the oxygen in combustion. That oxygen then leaves the cylinder and is read by the wideband.

I also noticed you trims were way negative under cruising conditions but im chalking that up to the failed purge valve that you have since replaced.

Those spark plugs you installed, what did you set the gap to? I don't want to know what their pre-gap is. Trust nobody. What did you set the gap to?

I will do log again since i got new purge valve and i will do a larger one. I did colder plugs but Ford replaced engine and put new plugs in. guessing it is factory gap.

 

Did you pull the plugs and regap? What were they set at?

 

Compression test all cylinders. Cylinder 1 is pulling alot of timing. I will look at it more when I can get an actual computer but those throttle closures... you definitely need to verify the mechanical condition of that engine. Before you do anything else.

 

i can do that but I just got it back from Ford. broke a connecting rod. car only has 55k. They replace the block and heads.. Had issue before and after then engine swap.

 

So you didn't actually pull the plugs out and regap them. Got it.

 

So you didn't actually pull the plugs out and regap them. Got it.

No but i will do it on Friday.

 

JM5Z-6006-A is just a bare long block
CJ5Z-6009-A is a short block

My guess is if you were having issues before they just swapped the problem over.

 

JM5Z-6006-A is just a bare long block
CJ5Z-6009-A is a short block

My guess is if you were having issues before they just swapped the problem over.

Not just befor but couple months.

JM5Z-6006-A is just a bare long block
CJ5Z-6009-A is a short block

My guess is if you were having issues before they just swapped the problem over.

bare long block does that mean not the heads?