A Ford W a n k I wmiese’” d ustmg Vacuum Date: 04/24/92 Regulator VaIve File: C6 The Va~uim Regulat or Valve Is Very Import ant On Diesel Engines And Needs To Be Adjusted Properly By Joe Cangelosi Tech Hotline Rep There is no Mani fol d Vacuum on diesels Diesel engines do not have manifold vacuum. Because of this, there has to be a vacuum source and a way of vary- ing vacumm to the transmission. A vacuum pump is that vacuum source and the Vacuum Regulator Valve VRV) is used to control the vacuum signal to the transmission so that it can operate as it does on gas engines. The VRV is located on the fuel injection pump and is operated by the throttle lever. What to do if you have a C6/Diesel with shifting problems If you have a Ford truck with a diesel engine and shifting problems like no shifts, early shifts, late shifts, or erratic shifts, the problems could be caused by poor vacuum response. The VRV or vacuum pump could be the problem. The first thing to check is the vacuum pump. With the engine running, make sure you have at least 20 inches of vacuum available from the vacuum pump you do , proper adjustment of the VR V is next. If not, check or replace the vacuum pump. Va II Vacuum To Transmission . ””” supply Vacuum Regulator Valve VRV) f ‘ W Fuel Injection ‘Ump Ford and Fuel Injectio n Pump Step-By-Step Adjustment of the v To check the VRV for proper opera- tion and to adjust it, the e ngi ne must NOT running. 1. Disconnect the two port vacuum hoses from the VRV located on the left side of the fuel injection pump. 2. Attach a hand vacuum pump to the upper port of the VRV (vacuum supply side). If you do not have a vacuum pump use an air conditioner vacuum pump or run a vacuum hose from a running gas engine to the upper port. . . . ---- . . . ..-. —

15 Vacuum Regulator Adjustment for c4

Download PDF Report

Upload
jose-garcia
View
10
Download
0

Embed Size (px)

DESCRIPTION

How to adjust shift points and shift feel by adjusting modulator. Late shifting harsh shifting.

Citation preview

A ,

7

I Ford RWD

a&nk I c6wmieseAd]ustmg VacuumDate: 04/24/92

Regulator VaIveFile: C6

The Va~uim Regulator Valve Is Very Important OnDiesel Engines And Needs To Be Adjusted Properly

By Joe Cangelosi, Tech Hotline RepThere is no Manifold Vacuum ondiesels t

Diesel engines do not have manifoldvacuum. Because of this, there has tobe a vacuum source and a way of vary-ing vacumm to the transmission. Avacuum pump is that vacuum sourceand the Vacuum Regulator Valve (VRV)is used to control the vacuum signal tothe transmission so that it can operateas it does on gas engines. The VRV islocated on the fuel injection pump andis operated by the throttle lever.

What to do if you have a C6/Dieselwith shifting problems

If you have a Ford truck with a dieselengine and shifting problems like noshifts, early shifts, late shifts, or erraticshifts, the problems could be caused bypoor vacuum response. The VRV orvacuum pump could be the problem.The first thing to check is the vacuumpump. With the engine running, makesure you have at least 20 inches ofvacuum available from the vacuumpump. H you do, proper adjustment ofthe VRV is next. If not, check or replacethe vacuum pump.

VaPI II am -1- Vacuum To Transmission.-, !

supply

Vacuum RegulatorValve (VRV)

If TW%

FuelInjection

L/ Ump

)Ford VRV and Fuel Injection Pump

Step-By-Step Adjustment of theVRv

To check the VRV for proper opera-tion and to adjust it, the engine mustNOT be running.

1. Disconnect the two port vacuumhoses from the VRV located on the leftside of the fuel injection pump.

2. Attach a hand vacuum pump to theupper port of the VRV (vacuum supplyside). If you do not have a vacuumpump use an air conditioner vacuumpump or run a vacuum hose from arunning gas engine to the upper port.

. . . ---- . . . ..-. .
3. Attach a vacuum gauge to thelower port of the VRV, which is labeledTRANS.

4. Apply 20 inches of vacuum to theVRV if using a hand pump. It will benecessary to pump the vacuum upduring the test as it bleeds off.

5. Cycle the throttle lever 5 timesfrom idle to wide open throttle withvacuum applied.

6. Insert a .515 gauge block (FordPart# T83T-7B200-AH) or a 1 /2 blockof wood between the pump boss andthe wide open throttle stop. Make sureyou hold the throttle lever against theblock. The vacuum gauge attached tothe lower port should read between 6and 8 inches of vacuum. If reading isnot correct, adjust the VRV to get areading of 7 inches of vacuum.

7. To adjust, loosen the two adjustingscrews and rotate the valve until youget 7 inches of vacuum.

8. Remove the gauge block and applyand maintain 20 inches of vacuum tothe top port of the VRV.

9. Cycle the throttle lever 5 timesfrom idle to wide open throttle. Checkthe vacuum at the lower port with thethrottle at the idle position. It shouldbeat least 13 inches of vacuum. If theVRV cannot be adjusted to get the

THROITLF LOWER PORTWIDE43PEN (TRANS.) UPPER PORTSTOP (NON-

I(SUPPLY SIDEI

ADJUSTABLE) /

////

T83T-782004iH

\FRONT OF ENGINE

THRO-TTLER ET U R NSPRING

pU~P BOSS

wide open throttle stop . .

Proper vacuum readiruz or fails anv~ar; of this test, it mus;be replaced andthe new VRV adjusted with the stepslisted above.

10. Remove your vacuum source andvacuum gauge, then re-connect thevacuum hoses making sure they are onthe right port. Check throttle opera-tion, and check vacuum at the modula-tor. If the vacuum and vacuum re-sponse is not exactly the same at themodulator as it was from the VRV, lookfor a leak, kink, or collapse in thevacuum line to the modulator.

OlSS2 AAMCO Trmarnhbns, Inc. All Rights Reserved. Primed in U.S.A.