Fuel Pump Change on the same tune

[noshine4mine]

Will changing the fuel pump on a 2019 car adversely affect the current tune on the car. It was originally tuned with the stock pump in it. and while my car was down waitting on the engine I installed a DW400. I am starting to worry it is going to not run very good while I am doing the initial start and break in.


THanks,

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[engineermike]

Short answer is it will be fine as long as you got the dw400 with the check valve.

Long answer is that the tune *may* not have sufficient range to lower the lift pressure to setpoint. However, the gen3 has a fuel pressure sensor and will automatically cut the injector pulsewidth when the pressure is not following commanded.

 

[noshine4mine]

Short answer is it will be fine as long as you got the dw400 with the check valve.

Long answer is that the tune *may* not have sufficient range to lower the lift pressure to setpoint. However, the gen3 has a fuel pressure sensor and will automatically cut the injector pulsewidth when the pressure is not following commanded.

Well I bought the DW400 this year from Lethal, The tech notes at DW say as of 5/5/2019 they have the check valve. I dont have the documentation with me. I will have to double check.

Thank you for the reply.

 

[cobrakid]

HOW do we know if we have the DW400 "with" the check valve, as compared to without it?

 

[Grimreaper]

It should hold rail pressure after primed/engine off. Either turn Acc on or full start then off. Check low side rail pressure with what ever your logging with.

 

[illtal]

you can just install this the FPR will regulate the PWM on that pump

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