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Message: [QUOTE="TARM, post: 348703, member: 578"] ALWAYS RUN A INLINE FUSE on anything electronic in vehicles period. A lesson hard learned. Along with using only high quailty fine stranded wire on #g size larger than needed and connectors. SO the guy at Aeromotive stated the heads rail are a point of restriction. By that I am betting he specifically means the rail ports and fittings. This is not stating this is the issue here but it does bring up something I considered when doing my final fuels system design. Again I am not saying this is THE reason but more asking questions and throwing out some ideas and theories. A question for others like Marty and those that have done a number of these as well or anyone that may have bothered to test: Has anyone bothered to ever check and see if there was a pressure difference between pressure before the heads and then after at the regulator. Testing it both with using the standard fuel rail ports and then the larger inspection port with a standard JIC ORB not banjo fitting? I could see it being plausible that there could be a pressure difference especial with certain ways some run fuel lines. One example would be if you were to run in one head out the the other port then into the other head and finally out of it to the regulator. That versus a Y going to each head thus dividing the vol between each head port. Most important would be when the truck is running and in use. Consider the size of the hole in the 1/4 NPT fitting that goes into the fuel rail port and then if its an angled fitting. That that vs the internal size of the -6 hose opening. Then add in to that hot fuel that could exacerbate the issue from not enough cooling and decreased lubricity. Further is not the A1000 specifically not rated for diesel and there is a specific marine version that is diesel rated. Yes I know how many A1000 are running fine on diesel just bring up a point. IMO there is a good reason Fuelab does not recommend having their pumps run at full speed except for short periods unless extra cooling etc is provided. [/QUOTE]