Stock Fuel Pressure reading?

[jasonlel]

Hi guys,

What's the stock fuel pressure reading? I'm afraid I'm getting low fuel pressure....
If so, is it better to get a new fuel pump or a fuel pressure regulator?

 

[RERider]

If I remember correctly the stock setting is at 2.2bar(~32Psi). My setting adjusted to 2.5Bar(~44Psi) after dyno tuned.

We're starting to see more stock FDs having low flow problems from their original pumps. This is because the original stock fuel pump starts to show their age with time (~13 years). Better get your original fuel pump replaced or upgrade a better fuel pump. Try to get a Walbro(341).

Also, if u dont know when was the fuel filter was replaced, put a new one on. A must done for every other year.

 

[jasonlel]

Any idea where can i get a original fuel pump in Malaysia? and roughly how much would it cost?

Walbro is good, but it is a direct fit?

If I remember correctly the stock setting is at 2.2bar(~32Psi). My setting adjusted to 2.5Bar(~44Psi) after dyno tuned.

We're starting to see more stock FDs having low flow problems from their original pumps. This is because the original stock fuel pump starts to show their age with time (~13 years). Better get your original fuel pump replaced or upgrade a better fuel pump. Try to get a Walbro(341).

Also, if u dont know when was the fuel filter was replaced, put a new one on. A must done for every other year.

 

[RERider]

Denso is the OEM for Mazda. Try to get it with local spare parts shop, u'll need to provide a part no. for ordering. I dont know the cost. You can check it from a Mazda OEM part website.
I'm using SARD(280L/h@RM880) and it is a direct fit. If u use SARD u will need to do a direct supply wiring.

 

[jasonlel]

Hi guys,

I gotten myself a new walbro 341. Indeed, on idle I'm getting about 30/31 psi as compare to last time only 24psi. But I'm still experiencing jerks during positive boost. I'm very sure is not the ON boost jerk coz it jerk a few times. What could be the reason? Fuel filter just change few mths back.

Some extra infor.
Exhaust temp, degree cel.
On idle: 380 ~ 390
Normal driving:500-600
Hard Drive:>600 ~ <650

 

[jasonlel]

Fuel Pump Resistor :(

At last, my problem solved.

Did a check at fuel pump wiring voltage. Everything is oke. Last resort was to look at the fuel pump resistor. We are not sure how to check if the resistor is in perfect working condition, so we switch to another resistor. But it didn't solve the problem. So out of curiosity, I did a voltage check on the wire connecting to the resistor. I'm getting about 10v+/-. So I guess this is the culprit. It is not powering enought voltage to the fuel pump resistor.

So I by pass the fuel pump resistor and rewire the fuel pump to get 12v from batt source with a relay.

Violaaaaa, problem solved!!!!