2008 Mazda Speed3 - Weird Noise From Hpfp When Cold Symptoms Of A Bad High Pressure Fuel Pump Youtube

Author Dalbo 29 Jun 2026

In order to get the best understanding of the fuel system equipped on these disi engines, i find it best we start at the very beginning, and the very beginning is in the fuel tank in the rear of the car Step 2 is whatever mod you desire Both the mazdaspeed 3 and mazdaspeed 6are still equipped with y…

Dyno Mazda Mazdaspeed 3 Turbo HPS Cold Air Intake Kit - YouTube

2008 Mazda Speed3 - Weird Noise From Hpfp When Cold Symptoms Of A Bad High Pressure Fuel Pump Youtube

After getting past the chart chatty hpfp (disassemble and clean that bad boy twice a year), i hear what sounds like an unhappy tensioner, pulley, or belt Purchase and install high pressure fuel pump internals (hpfp) this is the first mod you have to install on these cars Check tension and belt play, bust out the.

My hpfp has been ticking a bit louder than usual, which i’ve heard is relatively normal

But recently it has been making a harsh, rattling/tapping sound It’s only under load and seemingly only in boost You have decent fuel pressure going to the hpfp but you shouldn't condemn the spill valve yet or the fuel pressure sensor Check for corrosion, moisture, or poor terminal tension at the ecu and.

Hello fellow mso'ers, so i've been having a hard time with this weird hum noise under boosted acceleration on my '07 speed 3 I've got some mods done to it, but i have no idea what. I have a px9 / isl Had a crank no start issue

ENGINE NOISE RATTLE ON COLD START OR ALL THE TIME MAZDA 2.3 CX-7 CX7

Found one hpfp lifter to not be working with high hpfp fuel return

Crank and cam not in synch I made a post yesterday about getting this speed 3 with 114,000 miles on it out of a parking lot, after sitting for three years After putting fresh gas and a fresh battery in it, it cranks up every time,. Because of the traction issues, any application of throttle in any gear in the boost range of this car (2500 rpms+) causes wheelspin (up to fifth gear on a dry highway, even then it shuffles about).

Because the hpfp piston moves fuel by displacing volume inside the pump it means that the fuel flow is dependent on the engine speed, assuming you have no recirculation or regulation in. I cleared them but now can't get them to come back Looking for any insights or advice on things to look for before/during when i rip out and clean my autotech hpfp this saturday I have been tuning with justin at freaktune and he noticed.

HPFP Troubleshooting | CorkSport Mazda Performance Blog

Any time i went to high boost the car made a banging noise and stuttered and was running rough

After a week that has since cleared but i’m still having really bad cold starts that are throwing a cylinder 3. Ok what noise are we concerned with because i hear a bunch of stuff Moving the camera around is creating an effect on the way things sound Right at the end of.

Hpfp noise so i tore down and cleaned my hpfp today after dropping psi during tuning Now i have perfect numbers across the board on my ap, and it's running fantastically, but it's making a noise i can. Let's take a look inside one of these click monsters. My guy, i will show you the way