truck stumbles during acceleration

[mmvic]

My friend Darriel s ty is having an issue while accelerating. Here is a data master screen shot of when the problem happens. The ignition system is all new and the fuel system is working properly. Any help/suggestions are appreciated

 

[mmvic]

Re: truck stumbles during acceleration

Can that low ecm voltage affect the spark advance? I an working on uploading full file but my laptop is not working too good...

 

[pearl91chevy]

Re: truck stumbles during acceleration

I can see the Volts are pretty low at 12.1 at wot

 

[mmvic]

Re: truck stumbles during acceleration

I can see the Volts are pretty low at 12.1 at wot

Thanks for the reply. I had similar low voltage around 12.3@wot and I didn't really notice any real problem but I did the erue ecm voltage mod and now i get over 13v at wot.
Dariels truck really stumbles. We will do the mod and see if it helps..
Hopefully tonight I can get the full datamaster run on here if somebody can take a look

 

[wildphil]

Re: truck stumbles during acceleration

What is he tuning with? Stock setup, Code59?

 

[mmvic]

Re: truck stumbles during acceleration

What is he tuning with? Stock setup, Code59?

Pitbull chip, does same with stock

 

[QWERTYphoon]

Re: truck stumbles during acceleration

does it have msd 6al or coil on it?

 

[mmvic]

Re: truck stumbles during acceleration

does it have msd 6al or coil on it?

it did have both, but same with neither...


here is the datamanster file if someone could take a look
https://drive.google.com/file/d/0B_fFTLV1-gIKVkF3MWhEODZJVHM/edit?usp=sharing

 

[mmvic]

Re: truck stumbles during acceleration

I mentioned to him that somebody said msd coil, he swapped it with stock and it's fixed, thanks QWERTY