![]() ![]() I helped a buddy recently with interals, it took about 2 hours doing it, we were in no rush, drinking beer. I sent them a letter about my pump, never received any response back. If it fails, there goes your motor if you dont catch it in time, and good luck having CPE warranty it. Internals have come along way now, i wouldnt bother with the CPE pump. If you let those conditions persist for too long, what happens is with those drops in fuel pressure, combined with cylinder 3 flowing 25% more air than the other cylinders, it goes lean (lots of air, little fuel) and detonates, and in extreme cases will blow up the piston, cracking ring lands, puts a hole in your block ![]() With my first gen speed3, i was hitting severe fuel cut with just an intake. It feels like hitting a brick wall at speed, its that abrupt. Slowly, you start to loose pressure, eventually you will start to get severe fuel cut because the HPFP craps out momentarily dropping fuel pressure. ![]() When you start to mod the car, it puts a higher demand on the HPFP. This involves high pressure to atomize the fuel properly. The injectors spray directly into the combustion chamber. Some V6 Mazda vehicles (Tribute, MPV) also have this issue where the rubber elbow at the back of the intake manifold rips through, causing a vacuum leak and the code P0171. ![]()
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