Gov spring kit/low power??? HELP!

[R.ebel]

This weekend I installed the heavy duty valve springs (both intake and exhaust) and the BD govenor spring kit, I was looking forward to the new level of performance. Well now my truck is WAY DOWN ON POWER #ad
On my 'test' hill my top speed is back to pre-bomb levels #ad
The max boost pressure is down about 10 psi and takes forever to build up to peek pressure. Egt's are also way down, which tells me that for some reason I'm not getting the same level of fueling. Hard pressed to see 1200* WOT in 5th gear now. Also the throttle tip in is a little touchy right off idle. Took it to 3000 rpm and noticed some kind of slight vibration (almost like a miss) that would go away at 3200 rpm and the engine felt like it wanted to pull, but above 3200 rpm it got rough again and the acceleration went flat?



During the govenor spring install I was very carefull to tighten both the spring retainer nuts to the same level of stud protrusion as the stock setup which was . 070" this measurement was checked and double checked.



The position of my #11 plate was scribed on the housing before removal so I know my plate is in the proper location.



The AFC housing went back on in its old location, slid all the way forward and the star wheel adjusted to my elevation of 6000' for a healthy puff of smoke when I put my foot down.



All the intercooler clamps are tight. Any words of wisdom greatly appreciated, for I am really bummed out #ad
#ad

 

[HEMI®Dart]

R. bel,


Double check this thread to make sure everthing is correct:
https://www.turbodieselregister.com/ubb//Forum1/HTML/002547.html

It sounds like you did everything right.

Is your valve clearance ok? (lash)



[This message has been edited by HEMI®Dart (edited 03-19-2001). ]

 

[R.ebel]

HEMI®Dart

Everything checks out except for I'm at . 070" (which was the stock setting) and Piers said about . 060" Tried going one click tighter on the spring tension and the it seemed a little worse.



Edit-valve lash was checked at valve spring change, adjusted to spec.

 

[dieselburner]

Originally posted by R. ebel:
HEMI®Dart
Everything checks out except for I'm at . 070" (which was the stock setting) and Piers said about . 060" Tried going one click tighter on the spring tension and the it seemed a little worse.

Edit-valve lash was checked at valve spring change, adjusted to spec.

Check your boost sense line to the afc. Make sure the line isn't cracked and you have good connections. Everything else sounds like it's right. By the way, my springs were at . 039". It's not your governor that your having problems with though. Good luck.

Steve (waiting for a new clutch)

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1998 2500 Quad Cab, 12V, 5spd, 4x4, HD Transfer Case, 370HP Diamond B Injectors, #4 TST, 16cm2 Housing, AFC Spring Kit, BD Governor Spring Kit and other governor modifications, Walker Muffler, 285/75-16 BFG AT's, Stainless Steel Tube Steps, Reese Fifth Wheel Hitch, Leather, CD, LSD Dana 80 Rear, 60 Front, Centerforce Dual Friction Clutch, Rancho RS9000 Shocks, Rancho Steering Stabilizer, ATS Exhaust Manifold, Psychotty Air Induction, BD Exhaust Brake, Enterprise Engine Delivery Valves

 

[ramman]

try looseing the springs two clicks,I had the touchy throttle also and with help from Piers I finally found a happy medium .

 

[dieselburner]

Originally posted by ramman:
try looseing the springs two clicks,I had the touchy throttle also and with help from Piers I finally found a happy medium .

I originally adjusted my spring packs one click beyond what I had measured as the stock set up and I had a very touchy throttle too. After backing off to the original setting it was fine. It did not affect my overall fueling however. I don't think that his underpower problem is with the springs but that should help with the throttle sensitivity.
Steve

 

[Piers]

Hi Richard,
Sorry to hear you're having troubles, here are some things I'm sure you've
checked but I'll mention them anyway.
Is the AFC line hooked up
Cam plate in straight
Retaining nuts down to the original level
AFC housing all the way forward
How is the idle, higher or lower than before you started?
If all is correct, I'm assuming you got two seats and six governor springs
in the kit, once in a while I run into a pump that doesn't react like it
should, usually ends up that the arm that is supposed to ride along the
contour of the cam plate gets caught on the front lower portion of the plate
[ the part that doesn't give you much fuel] You could try moving the cam
plate forward about . 030" & see if that fixes it. Please feel free to e-mail
me at home or work or call me at work if that doesn't solve the problem.
1-800-887-5030 If we can't get this sorted out I would like to send you, at
no charge, a different cam plate to try. If that is not acceptable I will of
course refund you your money. I'm confident we can work it out though, there
are a few hundred of these kits out there & only three people reported
having any trouble & all three of those are now fixed.
Piers
-----

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Piers, BD engine R&D

 

[R.ebel]

Piers, Thanks for the great response! #ad
The AFC housing is all the way forward, I checked the AFC boost signal line for cracks and there were none(it's hooked up also). The plate is in straight. I did get 6 springs and 2 spring seats.



The idle speed is real close to the old setting, maybe just a touch higher.



I guess I'll try sliding the fuel plate forward . 030 and see what happens.

 

[Joseph Donnelly]

Check your fuel pressure coming from the lift pump. TST makes an adapter to replace the bleeder screw with the 10 mm head. If your lift pump or overflow valve is marginal, you may not be getting enough fuel.

 

[R.ebel]

Moved the fuel plate forward . 045 today and it helped some. Talked to Piers and he said "slap that plate all the way forward and see what happens", I did and am happy to report that the power is back to about 90% of normal. Currently working with Piers for a final fix #ad


Can't say enough good things about BD POWER they take good care of their customers!

 

[R.ebel]

Update: Piers at BD Power graciously offered a couple of ways to remedy (at little or no cost to me) the low power problem I was experiencing after the installation of BD governor spring kit. I opted to remove my pump and send it to BD for a courtesy calibration check-up and while it was there repair a leaking throttle shaft seal (at my expense).

To make a long short... . I ended up with a new overflow valve, some repairs made to my governor (was told it had several problems one of which was the governor was leaking internally) and my pump recalibrated to BD's 300 HP specs with full fueling to 3400 RPM #ad
I didn't expect to end up with one of BD's 300 HP pumps but I did and are EXTREMLY PLEASED with it! To make things even better I got all of this done at one HECK of a low price considering all the work they did to my pump!

In this day and age it is certainly refreshing to find a company that is willing to stand behind their products and in doing so take good care of their customers!

Thank you Piers at BD Power #ad

 

[drawson]

Mine isn't this bad but I guess I have to go back into the pump again.