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Old 07-10-2013, 01:35 PM   #50
manitou
Scooby Specialist
 
Member#: 193757
Join Date: Nov 2008
Chapter/Region: MWSOC
Location: Cedar, MI HP Techs MPS-SSLR2.5
Vehicle:
2006 XTI Limited
OBP, Junior tuned 573WHP

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Quote:
Originally Posted by jtrakel View Post
We are looking into the MAF stuff right now I'm chalking this up to some type of software issue. I did some more driving around yesterday before work I do not get any type of misfire issue while under 2k no matter the gear. Once about the 2k mark in RPM it will begin to missfire on cylinder 1. It tappers off when in 5th and is almost non existent in 6th. I'm wondering if this has something to do with the Speed Density taking over the MAF or what. Currently awaiting a response from my tuner for more guidance. With that being said though I'm pretty confident it is nothing mechanical.




No blockage anywhere in my fuel system we have already looked though that the pump is doing it's job if I pinch off the return line pressure sky rockets to 100psi like it's supposed to. I'm simply not giving enough fuel to my 2150's I wondered from the get go if this pump was not enough and I'm finding it out now O well. I'm leaving for a school in a couple weeks so my motivation to complete the car right now is dwindling away since it will be winter when I get home again. O well more info to follow later!
Sounds like tuning but not load based. You should have him just run SD with no MAF. It may take him a bit more to get that right with the VE map and all but Jr. tune my car that way and it runs very nice from idle on up!

Did you do the re-wire of the Walbro with 10 or 12 gauge wire, bigger relay etc...?
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