I recently had my truck tuned by Dez Racing and it was running well for awhile. Now all of a sudden I'm seeing upwards of 8deg KR again and I have lots of hesitation etc. Basically, it's running like ****. I have HPtuners but don't understand any of it. Would anyone with a similar setup be willing to share some files?

 

A little more background info might help. In your sig it says nelson tune, is this the same truck you are sking about?

 

I have a 99-00 pcm so you won't be able to read my files, but I can take screen shots of certain tables if you need them.

You don't have any vacuum leaks do you? Your Ltrims aren't really positive at idle are they?

 

I started with a Nelson Tune, but, after 8 tries, i decided to buy HPtuners and have it dyno tuned.

Here's what it seems to be doing: It seems like when i'm cruising, as soon as i give it enought throttle to get the boost up above 0, it boggs out. feels like a fuel issue.

When i floor it, my KR goes up to 7 or 8 and my fuel pressure sometimes will bounce from 60 to 50 a few times.

I just feel like I can't ever be sure if I'm gonna be able to pass someone or not, scares the crap out of me. If someone can give me a list of things to log or look at, I'll at least know where to begin. Thanks in advance.

Oh, and I do have an alcohol inj kit, but, it doesn't seem to kill the kr. I've tried turning it all the way up and seems like it doesn't help, just burns more alcohol.

 

Are your MAF readings okay? The VE tables won't help you much above 1 bar pressure, causing the motor to lean out worse as boost increases. Also, did this problem come on instantly, or did it start small and gradually get worse?

 

Are you getting false knock?? If you are spraying alot of alky at it and the KR isnt coming down at all, there has to be something else going on.

 

That's what i'm thinking too. I'm actually away from home today and don't have my HPtuner with me. I'll try to log some **** tomorrow and post up here. Also, i noticed that my spark plug wire on the pass side closest to the firewall is shaking like crazy. WTF?