D19 - S40/V40 to 2004 - Fuel pump resistor mod?

emarkey · Jul 7th, 2016, 00:03

Hi, new to the forum.

Has anyone here done the fuel pump resistor mod on a v40/s40 1.9tdi where you add a resistor/potentiometer into the fuelling loom which tricks the ecu and adds more fuel for more power?

It has been covered a lot on german engines but not so much (at all) on these volvo/renault engines.

Darlo 1 · Jul 7th, 2016, 00:19

All it does is trick the ecu into thinking it is a cold engine, for more power get a proper remap cos it will eventually bugger your engine, or if you wanna go faster get a T4 s/v40.

emarkey · Jul 7th, 2016, 08:19

I have done that mod, its the one with the resistor in the MAF, replacing the IAT with a big resistor.

This car is a daily, but its also a car to mess around with, so I'd like to try all these DIY kind of mods for fun.
Most likely, I'll do the mod and then want my fuel economy back and un-do it!

Thanks for the reply though! Appreciate it

martin_r_smith · Jul 7th, 2016, 11:43

as said above if you really want/ need more power then get a proper remap. There is a reason why you can't find info on doing the resistor mod on these and that's because most people aren't that stupid and value some reliability.

As the old saying goes - "Cheap, Reliable, Fast - Pick 2"

Sorry it seems blunt but get it done properly first time and you wont look back.

emarkey · Jul 7th, 2016, 13:40

Its hard to find the info alright.

Its more of a thing to try at the weekend, for the craic.

I'm not a complete idiot, i know its not the best thing to do, or even a good thing, but I still want to try it!

I will probably get it mapped properly is I have some spare money alright.

Thanks!

emarkey · Jul 8th, 2016, 10:36

Looks like the evry mod cant be done on this particular engine. Oh well.

emarkey · Jul 9th, 2016, 01:18

Has anyone tried a resistor mod on the fuel pressure sender??

Jul 7th, 2016, 00:03	#1
emarkey New Member Last Online: Jul 14th, 2016 18:40 Join Date: Jul 2016 Location: Meath	Fuel pump resistor mod? Hi, new to the forum. Has anyone here done the fuel pump resistor mod on a v40/s40 1.9tdi where you add a resistor/potentiometer into the fuelling loom which tricks the ecu and adds more fuel for more power? It has been covered a lot on german engines but not so much (at all) on these volvo/renault engines.

Jul 7th, 2016, 00:19	#2
Darlo 1 Lunatic. Last Online: Today 15:15 Join Date: Dec 2006 Location: staffordshire	All it does is trick the ecu into thinking it is a cold engine, for more power get a proper remap cos it will eventually bugger your engine, or if you wanna go faster get a T4 s/v40. __________________ V40 1.9D 2004 620 miles to the tankful. 235000 miles on clock. Now sold, S60 D5 2004. I vape therefore I am.

Jul 7th, 2016, 11:43	#4
martin_r_smith Premier Member Last Online: May 10th, 2022 21:01 Join Date: May 2009 Location: Wiltshire	as said above if you really want/ need more power then get a proper remap. There is a reason why you can't find info on doing the resistor mod on these and that's because most people aren't that stupid and value some reliability. As the old saying goes - "Cheap, Reliable, Fast - Pick 2" Sorry it seems blunt but get it done properly first time and you wont look back. __________________ 1983 244

Jul 7th, 2016, 08:19	#3
emarkey New Member Last Online: Jul 14th, 2016 18:40 Join Date: Jul 2016 Location: Meath	I have done that mod, its the one with the resistor in the MAF, replacing the IAT with a big resistor. This car is a daily, but its also a car to mess around with, so I'd like to try all these DIY kind of mods for fun. Most likely, I'll do the mod and then want my fuel economy back and un-do it! Thanks for the reply though! Appreciate it

Jul 7th, 2016, 13:40	#5
emarkey New Member Last Online: Jul 14th, 2016 18:40 Join Date: Jul 2016 Location: Meath	Its hard to find the info alright. Its more of a thing to try at the weekend, for the craic. I'm not a complete idiot, i know its not the best thing to do, or even a good thing, but I still want to try it! I will probably get it mapped properly is I have some spare money alright. Thanks!

Jul 8th, 2016, 10:36	#6
emarkey New Member Last Online: Jul 14th, 2016 18:40 Join Date: Jul 2016 Location: Meath	Looks like the evry mod cant be done on this particular engine. Oh well.

Jul 9th, 2016, 01:18	#7
emarkey New Member Last Online: Jul 14th, 2016 18:40 Join Date: Jul 2016 Location: Meath	Has anyone tried a resistor mod on the fuel pressure sender??

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)