startup/idle tuning after cam
startup/idle tuning after cam i just did a cam install. i am having issues with hot starts. using HPT i got it to crank up by messing with startup idle airflow however once it starts up it instantly tries to die. it drops to like 200 rpm and takes about 10 seconds to run up to 850. sometimes it will die and wont crank up without some throttle. i understand that typically you guys want to see some data, i dont have any to upload at the moment(the files are on my buddies cpu) can anyone tell me what needs to be played around with? or maybe even better, is there a specific guide for such problems anywhere?
http://ls1tuningguide.com/
is a good guide. If it's hot starts it's probably going into closed loops and the LTFT tables is not yet established and can make idling a bit of a nightmare. If it doesn't resolve after 30 minutes of varied driving it could be something else. I am not an expert, but I have run into that before. Really the MAF should be able to even that out though.
is a good guide. If it's hot starts it's probably going into closed loops and the LTFT tables is not yet established and can make idling a bit of a nightmare. If it doesn't resolve after 30 minutes of varied driving it could be something else. I am not an expert, but I have run into that before. Really the MAF should be able to even that out though.
You shouldn't approach tuning with the mindset of fixing each individual problem as they pop up; it's an overall process.
You don't even know if a startup problem is even a startup problem until the MAF, VE, idle airflow, and spark is tuned. You are most likely trying to bandaid bad MAF/VE/idle airflow tables by just adding in startup airflow. Look at tuning as a large process. Read through the info in the link that Zinner posted and spend some time reading over at the HPTuner's forum.
I'm not dodging giving advice, I just don't want to give the wrong advice.
You don't even know if a startup problem is even a startup problem until the MAF, VE, idle airflow, and spark is tuned. You are most likely trying to bandaid bad MAF/VE/idle airflow tables by just adding in startup airflow. Look at tuning as a large process. Read through the info in the link that Zinner posted and spend some time reading over at the HPTuner's forum.
I'm not dodging giving advice, I just don't want to give the wrong advice.
