Author Topic: 2010 Edition of the Governor Mod  (Read 169386 times)

Reply #195December 07, 2014, 05:32:24 pm

vwzzuk

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Re: 2010 Edition of the Governor Mod
« Reply #195 on: December 07, 2014, 05:32:24 pm »
Question: Has anyone documented the fuel mileage loss/gain after the governor mod?
91 Jetta, 1.6NA
87 Suzuki Samurai, 1.9 AAZ
92 Sidekick 4dr, 1.9TDI

Reply #196December 07, 2014, 09:18:00 pm

vanbcguy

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Re: 2010 Edition of the Governor Mod
« Reply #196 on: December 07, 2014, 09:18:00 pm »
Like with most diesel performance mods, you will see a mileage whack if you use your newfound abilities, but there shouldn't be any difference under general driving.  If you start spinning your engine up to 4500 RPM regularly with the pedal to the floor then yep, you're going to use more fuel.  But if you just drive around exactly the same as you did before you'll get about the same mileage.
Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen

Reply #197March 11, 2015, 05:05:29 pm

94bruce

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Re: 2010 Edition of the Governor Mod
« Reply #197 on: March 11, 2015, 05:05:29 pm »
Hi i am new to diesel tuning.

Have 1.6td (JX) in my 1989 vw transporter.

Was looking into this gov mod but is it worth shimming the main spring, if i don't want it to rev more than 4500rpm.

and read you don't shim the intermediate spring. So will shimming the main spring stop it reducing fuel before it cuts off at 4500rpm.

thanks


Reply #198March 11, 2015, 06:42:27 pm

vanbcguy

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Re: 2010 Edition of the Governor Mod
« Reply #198 on: March 11, 2015, 06:42:27 pm »
Correct, leave the intermediate spring alone.  It doesn't cut off fuel, just improves the behavior of the vehicle at normal driving RPMs.

There isn't any way to leave the 4500 RPM limit in place while reducing the cutoff as it approaches 4500.  You can only have one or the other - shimming the main spring will move the fuel cutoff to higher RPMs.
Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen

Reply #199March 14, 2015, 11:58:04 pm

vwzzuk

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Re: 2010 Edition of the Governor Mod
« Reply #199 on: March 14, 2015, 11:58:04 pm »
Thanks.

I'm going to have to do this mod on my pickup. Just seems like a valuable performance modification...especially for climbing hills.
91 Jetta, 1.6NA
87 Suzuki Samurai, 1.9 AAZ
92 Sidekick 4dr, 1.9TDI

Reply #200May 23, 2015, 11:55:49 pm

vwzzuk

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Re: 2010 Edition of the Governor Mod
« Reply #200 on: May 23, 2015, 11:55:49 pm »
OK, I did the governor mod last night when I had the engine out for another transmission.

I have the fast idle pump version. I shimmed the main spring a total of 3.48mm using 3 washers. I notice also that the main spring seat near the middle of the unit has a tapered collar in the middle. So, I used a washer that was large enough to fit around the taper to sit all the way down on the spring seat and shimmed from there.

Problem: When I started up the pickup, it idles at around 3000 rpms or so. Way to high of course. Could I have misplaced my throttle shaft position, that is, have it out 180 degrees? I understand that there are no major idle adjustments when you put it all back together to get rpms down or up as it remains close to the same and you are ready to drive like normal.

Any suggestions?
91 Jetta, 1.6NA
87 Suzuki Samurai, 1.9 AAZ
92 Sidekick 4dr, 1.9TDI

Reply #201May 24, 2015, 02:17:17 pm

vanbcguy

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Re: 2010 Edition of the Governor Mod
« Reply #201 on: May 24, 2015, 02:17:17 pm »
180 degrees out is a big difference. One or two splines though can easily bump it up to 3k.
Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen

Reply #202May 24, 2015, 05:05:13 pm

vwzzuk

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Re: 2010 Edition of the Governor Mod
« Reply #202 on: May 24, 2015, 05:05:13 pm »
I don't know if it can be out 180 degrees. That's the only thing I can think of that may be different from before I messed with it.

I made a mark on the plate so that I could get the throttle shaft back in the same position. It is in the same location because the top of the accelerator shaft has a slot on top and its aligned with my marks. Can they be out 180?  I would think the bottom of the shaft with the riveted arm would only go so far one way or the other inside the pump. Maybe I have something hanging-up inside?

I guess I will have to take it apart again and look. Dang!
91 Jetta, 1.6NA
87 Suzuki Samurai, 1.9 AAZ
92 Sidekick 4dr, 1.9TDI

Reply #203May 24, 2015, 08:02:22 pm

vwzzuk

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Re: 2010 Edition of the Governor Mod
« Reply #203 on: May 24, 2015, 08:02:22 pm »
So, I've established that the shaft can only go in one way so the 180 degree out idea is not valid.

I altered the fuel screw position to get it down to a reasonable (but higher than stock) idle. When you started it, it would have difficulty evening out to the idle.

This is weird. Seems like everyone has a strait forward governor mod. I believe I did everything right but this pump doesn't seem to respond well.

So, I'm going to take the shims out and see if the pump goes back to normal. Hummmmm.

-dave
91 Jetta, 1.6NA
87 Suzuki Samurai, 1.9 AAZ
92 Sidekick 4dr, 1.9TDI

Reply #204May 24, 2015, 11:30:02 pm

vwzzuk

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Re: 2010 Edition of the Governor Mod
« Reply #204 on: May 24, 2015, 11:30:02 pm »
Update: I took apart an identical fast idle pump to see what the stock spring assembly looked like in case my existing pump was different. They were both the same.

I took out the shims to see if it would return to stock performance and run without the shims properly. Answer is yes.

So, whats the deal? One can do the governor mod successfully on some 1.6NA pumps but not all of them?
Do I have to get a specific pump like a 107A?
Do you have to alter the fuel screw, idle screw or anything else after the governor mod is performed?
91 Jetta, 1.6NA
87 Suzuki Samurai, 1.9 AAZ
92 Sidekick 4dr, 1.9TDI

Reply #205May 25, 2015, 09:39:47 am

vanbcguy

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Re: 2010 Edition of the Governor Mod
« Reply #205 on: May 25, 2015, 09:39:47 am »
The fuel screw definitely needs to be adjusted any time you take the lid off of the pump. Idle speed too.

Can you post a picture of your shim job?
Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen

Reply #206May 25, 2015, 01:13:55 pm

vwzzuk

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Re: 2010 Edition of the Governor Mod
« Reply #206 on: May 25, 2015, 01:13:55 pm »
Looks like the attachment link doesn't work for posting pics in Safari or Firefox on a Mac.
« Last Edit: May 25, 2015, 01:31:50 pm by vwzzuk »
91 Jetta, 1.6NA
87 Suzuki Samurai, 1.9 AAZ
92 Sidekick 4dr, 1.9TDI

Reply #207May 25, 2015, 03:45:31 pm

745 turbogreasel

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Re: 2010 Edition of the Governor Mod
« Reply #207 on: May 25, 2015, 03:45:31 pm »
most of us use photobucket or some other image hosting service.
If you try to use the lid and arm from an opposite rotation pump, it will be 180 out, and won't work.

It's pretty easy to get one spline off, just saying...

Reply #208June 03, 2015, 10:43:35 am

vwzzuk

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Re: 2010 Edition of the Governor Mod
« Reply #208 on: June 03, 2015, 10:43:35 am »
« Last Edit: June 03, 2015, 10:45:06 am by vwzzuk »
91 Jetta, 1.6NA
87 Suzuki Samurai, 1.9 AAZ
92 Sidekick 4dr, 1.9TDI

Reply #209June 03, 2015, 10:23:15 pm

vanbcguy

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Re: 2010 Edition of the Governor Mod
« Reply #209 on: June 03, 2015, 10:23:15 pm »
Shim looks correct... Probably a bit more aggressive than mine but looks fine.

You absolutely do have to adjust the various pump settings after having it apart. I don't think your issues are caused by your changes unless something is binding. Can you still pull on the end of the governor capsule and have it move freely, in particular the intermediate spring?
Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen