HPFP irratic reading at high RPM

[DustinDriver]

Ok. Thanks for the help. Yes that's what I meant. Lol I guess I'll send it in and keep yall up to date with the findings.

 

[DustinDriver]

Autotech says upon inspecting my internals , the tolerances seem to be a little too tight. A new set is in the mail. New pump without a busted spill valve connector is waiting for new internals.

 

[Easter Bunny]

Great news

 

[DustinDriver]

Ok so still waiting for new internals. Spoke with Justin at freektune who tuned my car. He said when he sees hpfp pressure drop for just one cell in a log as odd as it sounds it's usually been a plug misfire. He said to try ngk3787 gapped at .026-.028. Anyone else run this plug? Is that the factory plug I've been running 1 step colder

 

[Easter Bunny]

If you are under 600 ish hp you should probably be on stock heat range plugs

Also your fuel pump internals we're definitely messed up so don't change anything else until you get those back in

 

[DustinDriver]

Yea I figured I'd do the internals and if nothing changed I'd keep the hunt going. Lol.

 

[DustinDriver]

New internals in. Same issue. Guess I'll be getting some plugs.

 

[Easter Bunny]

You cleaned the spill valve etc and nothing was the least bit sticky?

 

[DustinDriver]

New pump and internals yup

 

[DustinDriver]

New hpfp and internals. New plugs. Same issue

 

[DustinDriver]

Possible culprit?

 

[Enki]

You brewing coffee in that bitch?

Dips that hard are either a supply issue or pump is sticking either on spill valve or internals. When you cleaned it last, nothing was sticky when dry, right? Might be time to replace the ITFP filter and/or regulator, if the pump itself is still working fine.

 

[DustinDriver]

Cracked the nipple taking line off. New itfp coming tomorrow.

 

[Enki]

Ooh, you didn't know it's push to release did you? You thought it was a clip like the yellow one on the HPFP, but reality is you push on the white part and that spreads the lock out so you can remove the line.

 

[DustinDriver]

That's what happend. Does it just push back on over the nipple?

 

[Enki]

The goal is to make the sides kick out.



And yes, it should just push back on. The white plastic nipple is pretty much exactly like the fittings on the HPFP where the yellow and blue lines connect.

 

[DustinDriver]

Ordered 1 it came in with a different connector on top

 

[DustinDriver]

4 pin but in a line.

 

[DustinDriver]

Looks like I'm cleaning the filter and going to try marine jb welding the nipple.

 

[DustinDriver]

Looking online the strainer for the mazda 3 looks the same. Plastic bracket and all. Will it fit and work?