Need some thoughts please.

[manderson]

Hello, Newbie here! ???

I have a real bad random lean out condition after I first startup no matter what temp. I bought the HP tuners, great stuff by the way, to help me figure this out. So I started logging and fired up the engine, waited a few seconds, put it into drive and wham! Real bad lean condition. This clears up after a few short minutes so when I got home I ran the log. The injectors show no pulse. Now the truck is running so I would guess there has to be some pulse but not during this lean condition. http://rinren.com/Injectors.htm

Has anyone seen this?

Also I have this ignition issue while cruising my advance dips 20+ degrees for no apparent reason. http://rinren.com/spark.htm Could this be a bad coil or a trigger?

Thanks

[mediumrareintexas]

Running lean at startup is normal. The air pump is blowing air into the exhaust stream which confuses the 02 sensors. Should stop after a minute or so.

[manderson]

Thanks for the responce but I do not think it is that. The issue is so bad that even in neutral I cannot get the RPM's over 3000. As I give it gas the engine starts to rev but then just starts bogging and the rpm's drop to about 1000.

But I did read a forum and that person was able to fix this issue by cleaning his MAF sensor. Apparently a K&N filter could contaminated it with the oils from the filter and so far since I have cleaned it I have not had the problem. However I still have an issue with my advance where I will be cruising at a steady pace and the advance just drops 20+ degrees for a split second. I do not see any sensors following the same trend, I do not get a engine light so I am wondering what could tell the computer to drop the advance so much.

[chrisj6]

Is this drop during a shift or when you drop into the throttle real quick, this could be torque management acting on you.

Chris

[Bill@HPTuners]

Hello, Newbie here! ???

I have a real bad random lean out condition after I first startup no matter what temp. I bought the HP tuners, great stuff by the way, to help me figure this out. So I started logging and fired up the engine, waited a few seconds, put it into drive and wham! Real bad lean condition. This clears up after a few short minutes so when I got home I ran the log. The injectors show no pulse. Now the truck is running so I would guess there has to be some pulse but not during this lean condition. http://rinren.com/Injectors.htm

Has anyone seen this?

Also I have this ignition issue while cruising my advance dips 20+ degrees for no apparent reason. http://rinren.com/spark.htm Could this be a bad coil or a trigger?

Thanks

first is where you even logging the ipw's in the table display? you dont show a screenshot of the table display which is wher eyou pick what to log.

[Bill@HPTuners]

Thanks for the responce but I do not think it is that. The issue is so bad that even in neutral I cannot get the RPM's over 3000. As I give it gas the engine starts to rev but then just starts bogging and the rpm's drop to about 1000.

But I did read a forum and that person was able to fix this issue by cleaning his MAF sensor. Apparently a K&N filter could contaminated it with the oils from the filter and so far since I have cleaned it I have not had the problem. However I still have an issue with my advance where I will be cruising at a steady pace and the advance just drops 20+ degrees for a split second. I do not see any sensors following the same trend, I do not get a engine light so I am wondering what could tell the computer to drop the advance so much.

if it starts to bogg as you go over that rpm i would suspect a clogged cat.

[manderson]

The bogging is random and since I cleaned my MAF sensor I still have not had the issue so I think that was the problem.

As for the spark issue it is not during a shift. If you look at my screen shot, of the log, http://rinren.com/spark.htm, notice the RPM's don't change.

[ChrisXotic]

Log TQ Reduction, I had that and found I did not have all TQ red. removed

[manderson]

Guess what it was?



It was the MAF sensor had been contaminated, I suspect the oil from the K&N help this, but once I cleaned it out no more bog.