XDI Pump Issues

[Fk8Miggy]

Hello I have a 2019 Type r , it is full bolts ons and on ethanol and a XDI fuel pump. Recently got tuned by someone and felt like the car wasn’t running right.. top end it would cut off.. asked another tuner to check it out and he said it was my AFR was bad. Either that the LPFP can’t keep up with the XDI pump (HPFP) or might have to drill the fuel pump line to get more fuel in the injectors. I am confused because I don’t know what is the true issue is and I’m trying to figure that out. Please any help or and advice would be truly appreciated!

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[kefi]

Upload some datalogs and I'll take a look. Email it to [email protected], upload it at www.datalo.gs, or zip it up and upload it here.

 

[Fk8Miggy]

emailed some datalog! Thanks!

 

[Ahamenes13]

Hello I have a 2019 Type r , it is full bolts ons and on ethanol and a XDI fuel pump. Recently got tuned by someone and felt like the car wasn’t running right.. top end it would cut off.. asked another tuner to check it out and he said it was my AFR was bad. Either that the LPFP can’t keep up with the XDI pump (HPFP) or might have to drill the fuel pump line to get more fuel in the injectors. I am confused because I don’t know what is the true issue is and I’m trying to figure that out. Please any help or and advice would be truly appreciated!

You have to do both cause I was fighting with same issues xdi doesn't tell you that but you need to change the lpfp and drill the line the car will drive much better afterwards. I wish xdi posted this info on their site. I was getting break ups running lean all kind of craziness.

 

[kefi]

You have to do both cause I was fighting with same issues xdi doesn't tell you that but you need to change the lpfp and drill the line the car will drive much better afterwards. I wish xdi posted this info on their site. I was getting break ups running lean all kind of craziness.

I'm tuning multiple customers with just the XDI pump on E50 without drilling the fuel line or anything and they're doing just fine, on the track, on the dyno, and on the street. It's all about your tuner being competent.

 

[Ahamenes13]

I'm tuning multiple customers with just the XDI pump on E50 without drilling the fuel line or anything and they're doing just fine, on the track, on the dyno, and on the street. It's all about your tuner being competent.

I guess xdi isn't competent with their own product then cause these were all also recommendations from them which I thought was ridiculous and even after sending them data logs

 

[kefi]

I guess xdi isn't competent with their own product then cause these were all also recommendations from them which I thought was ridiculous and even after sending them data logs

They will help flow more fuel to the pump, yes. They're not going to tell you how to change your fuel pressures, lambda targets, and air charge limits in the tune in order to stress the pump less and make it work on the stock turbo without those mods. The 'mod' in Hondata for the XDI is pretty useless, it's not a full basemap designed for it like they have for the Hondata Fuel System.

However, if you've got a turbo *and* ethanol, those physical mods are required.

 

[Fk8Miggy]

You have to do both cause I was fighting with same issues xdi doesn't tell you that but you need to change the lpfp and drill the line the car will drive much better afterwards. I wish xdi posted this info on their site. I was getting break ups running lean all kind of craziness.

What specs did you drill the line to? I already installed a aftermarket LPFP since I’m going to be running above e40

 

[bolis_fk8]

What specs did you drill the line to? I already installed a aftermarket LPFP since I’m going to be running above e40

5/64" I believe

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