Ok. I got my intake from being ported and have found a fuel rail to work on the intake. It came with some flex fuel injectors that have a different plug than my lq9 injectors. I have to use these because they are taller than the ones I have and mine are too short. Does anyone know the part number and where I might buy these wiring adapters to adapter the gen 3 to the flex fuel gen 4 injectors? The part number on the flex fuel injectors is 12594512. Thanks in advance for your help.

 

http://www.ebay.com/itm/like/291480953108?ul_noapp=true&ul_ref=http%253A%252F%252Frover.ebay.com%252Frover%252F1%252F711-117182-37290-0%252F2%253Fmtid%253D1588%2526kwid%253D1%2526crlp%253D53601919689_324272%2526itemid%253D291480953108%2526targetid%253D154774718409%2526rpc%253D0.14%2526rpc_upld_id%253D62184%2526device%253Dm%2526mpre%253Dhttp%25253A%25252F%25252Fwww.ebay.com%25252Fulk%25252Fitm%25252Flike%25252F291480953108%25253Flpid%25253D82%252526chn%25253Dps%2526adtype%253Dpla%2526googleloc%253D9008533%2526poi%253D9008532%2526campaignid%253D239125209%2526adgroupid%253D14978428809%2526rlsatarget%253Dpla-154774718409%2526gclid%253DCj0KEQiAiNi0BRDaobaq3dKJhrwBEiQAyVThzXuZYhyAkJrkfwC-Qa74jX6Bb4cEkQTRgcqpAiicEyEaAg2K8P8HAQ%2526srcrot%253D711-117182-37290-0%2526rvr_id%253D966232200653&chn=ps&lpid=82 those should do ya!!!

 

I need to get a set for my truck as well... Running teo different adaptors at moment long story!!!

 

Thanks. I had looked on eBay but I guess I wasn't using the right description. I'll let you know when I finally get it on. I already have a baseline track run so I am anxious to see how much it picks up with the intake and then some long tubes.

 

I got the intake on but have been having a bunch of issues with it. I found a couple vacuum leaks and fixed them but I am experiencing constant sputtering and spitting at idle and part throttle. It is throwing the following dtc's:
P0300 - random misfire - main dtc since installation
P1516 - intake manifold pressure high - threw that one 3 times at track
P1514 - high load neutral - threw this one a couple times
It was throwing a P0171 & P0174 system too lean before I found the last vacuum leak but hasn't come up lately. Have any ideas what the problem might be? I have been pulling my hair out trying to figure this out. It does accelerate noticeably better at part throttle acceleration even with these issues. I started my new tune using hp tuners but didn't go very far as this is causing problems. Any help would be GREATLY appreciated.

 

What map sensor are you using???

 

I am using the map sensor from my lq9 intake as the one for the new intake has a different plug. I changed it yesterday to make sure that was not causing the sputtering but it wasn't. The old system ran on about 45 psi fuel pressure. This setup runs on 58-62 psi. The injectors are the newer flex fuel ones as my old ones were not tall enough.

 

Probably need to finish your tune, i am not a tuning expert by any means but you increase fuel pressure and went from a 45 psi fuel system with maybe 30lb injectors to 58psi with something like 40lb injectors, same duty cycle on the injectors are going to spray alot more fuel.... On map sensor did it fit in the hole?? I had to run mine off the small port on the side of the intake and use the map sensor that came with the intake as a plug... Wot fueling was way off with the nbs style map sensor connected, through an adaptor harness....

 

I finished the fuel trims part of the tune. Both long term and short term fuel trims are very close. I even tuned them again last night to verify it was right and they are good. The only thing left is the wot fuel which I don't want to complete with this issue.

 

Anyone have any ideas? I changed the mass airflow sensor also put it wasn't that either. Still searching for the sputtering problem.