Scorpio diesel pump timing and tuning for best performance & economy

MB-Sting · 12th February 2009, 19:31

Hi there

I was wondering if anyone has ever tried playing with the diesel pump settings and timing for better performance and economy. My scorpio also wont rev past 4000rpm, I suspect the govener is restircting this. Can someone also explain to me how to adjust the govener as I can feel the effect from 3600rpm. I dont want to rev it to 5000 but atlease would like full fuel to 4200.

13th February 2009, 16:25

Check to see if the air filter is clogged. Is it a 2.6 crde? If so, fuel pump tuning might not work. ECU manages the rail pressures and injection. Piggy back ecus or tuning box is the way forward then

MB-Sting · 13th February 2009, 17:28

Hi

Thanks for the reply. Its the 2.6 non crdi engine. I recently replaced the fuel filters. How do I adjust the governor on the BoschMico pump?

gd1418 · 13th February 2009, 19:04

Changing the pump settings will affect your FE and if you are not bothered about the FE then you can go ahead and experiment.

I dunno abou the pump settings in Scorpio but in my '98 Safari, on the pump there is a lever and two settings - advance & retard.

If the lever is moved towards advance, then more fuel, resulting in better pick-up and lots of black smoke..

badboyscad · 13th February 2009, 19:31

Please do not mess with your scorpio's fuel pump settings. It may lead to dire results(such as over revving, black smoke, starting problem, stalling when there is excessive load on engine[like when turning the steering, depressing clutch etc]).

Few months ago some mechanic in the A.S.S messed with my scorp's fuel pump and i had all the above issues as the result. It took about 3 weeks and 5 trips to the A.S.S to sort it out.

13th February 2009, 20:02

the non crdi engines do perform slightly better when the fuel pump is asked to push through more fuel, but, it has to be done right and the gains are not very significant. There's some one I know,who's done it on the accent DLS(non crdi).will check with him

stable rock · 13th February 2009, 23:52

It is better not to do any modifications in the pumps. The company settings will be ideal.You might get better pick up if you do necessary adjustments but it will burn more fuel and results in black smoke.

Mico bosch pumps are better for sudden acceleration when compared to the lucas pumps.Since you have mico-bosch pump better leave it alone.

RedMM340 · 15th February 2009, 05:10

Quote:

Originally Posted by MB-Sting

Hi there

I was wondering if anyone has ever tried playing with the diesel pump settings and timing for better performance and economy. My scorpio also wont rev past 4000rpm, I suspect the govener is restircting this. Can someone also explain to me how to adjust the govener as I can feel the effect from 3600rpm. I dont want to rev it to 5000 but atlease would like full fuel to 4200.

MB,

First of all, you have to choose what you want: performance or economy. Unfortunately you can't have both.

If you want more performance, increase the amount of fuel. If you want economy, leave the pump calibration stock, since this is what the factory setting is all about (economy).

I have a non-crde scorpio motor in my Jeep, and I have calibrated the fuel pump to about 5-10% higher, along with +25% flow injectors. The power is great and I get plenty of black diesel exhaust smoke. Needless to say, the economy is not so good.

If your motor is not revving up the way it should, maybe you should have the injection pump calibrated to make sure that the fuel is calibrated for the higher revs.

12th February 2009, 19:31	#1
MB-Sting Newbie Join Date: Jan 2009 Location: Pretoria Posts: 9 Thanked: 0 Times	Scorpio diesel pump timing and tuning for best performance & economy Hi there I was wondering if anyone has ever tried playing with the diesel pump settings and timing for better performance and economy. My scorpio also wont rev past 4000rpm, I suspect the govener is restircting this. Can someone also explain to me how to adjust the govener as I can feel the effect from 3600rpm. I dont want to rev it to 5000 but atlease would like full fuel to 4200.
	() Thanks

13th February 2009, 16:25	#2
rippergeo Posts: n/a	Check to see if the air filter is clogged. Is it a 2.6 crde? If so, fuel pump tuning might not work. ECU manages the rail pressures and injection. Piggy back ecus or tuning box is the way forward then
	() Thanks

13th February 2009, 17:28	#3
MB-Sting Newbie Join Date: Jan 2009 Location: Pretoria Posts: 9 Thanked: 0 Times	Hi Thanks for the reply. Its the 2.6 non crdi engine. I recently replaced the fuel filters. How do I adjust the governor on the BoschMico pump?
	() Thanks

13th February 2009, 19:04	#4
gd1418 Senior - BHPian Join Date: May 2006 Location: Gurgaon Posts: 3,578 Thanked: 728 Times View My Garage	Changing the pump settings will affect your FE and if you are not bothered about the FE then you can go ahead and experiment. I dunno abou the pump settings in Scorpio but in my '98 Safari, on the pump there is a lever and two settings - advance & retard. If the lever is moved towards advance, then more fuel, resulting in better pick-up and lots of black smoke..
	() Thanks

13th February 2009, 19:31	#5
badboyscad Senior - BHPian Join Date: Feb 2007 Location: TN Posts: 1,511 Thanked: 477 Times View My Garage	Please do not mess with your scorpio's fuel pump settings. It may lead to dire results(such as over revving, black smoke, starting problem, stalling when there is excessive load on engine[like when turning the steering, depressing clutch etc]). Few months ago some mechanic in the A.S.S messed with my scorp's fuel pump and i had all the above issues as the result. It took about 3 weeks and 5 trips to the A.S.S to sort it out.
	() Thanks

13th February 2009, 20:02	#6
rippergeo Posts: n/a	the non crdi engines do perform slightly better when the fuel pump is asked to push through more fuel, but, it has to be done right and the gains are not very significant. There's some one I know,who's done it on the accent DLS(non crdi).will check with him
	() Thanks

13th February 2009, 23:52	#7
stable rock BHPian Join Date: Mar 2008 Location: Bangalore Posts: 181 Thanked: 50 Times	It is better not to do any modifications in the pumps. The company settings will be ideal.You might get better pick up if you do necessary adjustments but it will burn more fuel and results in black smoke. Mico bosch pumps are better for sudden acceleration when compared to the lucas pumps.Since you have mico-bosch pump better leave it alone.
	() Thanks