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LS1 Eater
09-18-2005, 11:21 PM
Well got my new fuel pumps in and didnt fix the trucks. Still has a real bad stutter to it. Only other thought that I had is a coil pack or a messed up injecter. It doing in uneder a load so Im thingk a injector. The other thing is the coil pack going out. But that should case a big miss even at idle. Just wondering if any one has had a coil pack go out and if so did it miss only under a load or all the time? Sorry I know I ask alot of questons on here. But at this point im fixing to pull my hair out wiht L fest coming up so soon.
L8 APEX
09-19-2005, 12:51 AM
A hard miss under a load is ignition not fuel related IMO. Either a coil pack or bad plug due to burnt electrode or incorrect gap.
LS1 Eater
09-19-2005, 01:29 AM
A hard miss under a load is ignition not fuel related IMO. Either a coil pack or bad plug due to burnt electrode or incorrect gap.

What I dont understand is it started 3 weeks after I put the KB on. Pulled plugs and all were good. I data loged it with my sctand I could see a lean spike when under excel. So first thought was fuel pumps. Once I put the pumps in, I did some more data loging and no more lean spike but still have the miss. That's what is throughing me off.

So far I have put new NGK tr6's, Fuel pumps, Fuel filter. So my next two things are coil packs or injectors. Witch Im going with 60's But I have to retune the truck. Not what I was wanting to do 3 days before L fest. Shold a dealer ship have the coil packs instock?
L8 APEX
09-19-2005, 08:17 AM
Orielys sells them I think it is a Motorcraft DG 805??? Throwing parts at it will get expensive in a hurry. I would buy one coil pack and move it around until the miss goes away. It is usually a rear pack on either side.
LS1 Eater
09-19-2005, 11:22 AM
Orielys sells them I think it is a Motorcraft DG 805??? Throwing parts at it will get expensive in a hurry. I would buy one coil pack and move it around until the miss goes away. It is usually a rear pack on either side.

Yeah I really dont want to keep puting new parts on. The pumeps that I had were used so new ones were not a bad idea, a fuel filter is a normal thing. But coil packs are costly so I fiured I would ask about the problam before I wint a did them. Thanks for the help.