1999 5.9L Fuel Sync
#3072695
08/30/22 04:58 PM
08/30/22 04:58 PM
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Joined: Sep 2005
Posts: 1,177 Santa Ana, CA
DustyChicken
OP
super stock
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OP
super stock
Joined: Sep 2005
Posts: 1,177
Santa Ana, CA
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I have a customer with a 1999 B Van with a 5.9. We're having issues getting the fuel synchronization set. I have an Autel scanner that can do the Set Synchronization routine, and I can see the degrees.
The setting keeps bouncing around, usually a ten degree range. -2 to +8 for example. It also fairly regularly spikes to +23 degrees. I can get the distributor close, but it never sets into one place. If I rev the engine to 1000RPM the degrees freeze on my scanner and won't update until I let the RPMs come down again and restart the routine.
The customer replaced the timing change thinking that it was too slack and allowing the cam to bounce, but that didn't change anything. New aftermarket cam sensor in the distributor. New crank sensor. He did file down the crank tone ring because the previous crank sensor was set too tight and boogered it up a little. His other mechanic said it looked fine after filing, and I can see a steady RPM graph on my scanner. I took out the distributor and checked it for wear, there's no play in the shaft and the drive gear in the block looks okay. I'm not sure if it's properly timed to no. 1 cylinder TDC though.
Any ideas?
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Re: 1999 5.9L Fuel Sync
[Re: DustyChicken]
#3072722
08/30/22 05:41 PM
08/30/22 05:41 PM
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Joined: May 2003
Posts: 3,350 N.W. Florida
Fat_Mike
master
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master
Joined: May 2003
Posts: 3,350
N.W. Florida
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From the 2001 Ram Service Manual: Checking Distributor Position To verify correct distributor rotational position, the DRB scan tool must be used. WARNING: WHEN PERFORMING THE FOLLOWING TEST, THE ENGINE WILL BE RUNNING. BE CAREFUL NOT TO STAND IN LINE WITH THE FAN BLADES OR FAN BELT. DO NOT WEAR LOOSE CLOTHING. (1) Connect DRB scan tool to data link connector. The data link connector is located in passenger compartment, below and to left of steering column. (2) Gain access to SET SYNC screen on DRB. (3) Follow directions on DRB screen and start engine. Bring to operating temperature (engine must be in “closed loop” mode). (4) With engine running at idle speed, the words IN RANGE should appear on screen along with 0°. This indicates correct distributor position. (5) If a plus (+) or a minus (-) is displayed next to degree number, and/or the degree displayed is not zero, loosen but do not remove distributor holddown clamp bolt. Rotate distributor until IN RANGE appears on screen. Continue to rotate distributor until achieving as close to 0° as possible. After adjustment, tighten clamp bolt to 22.5 N·m (200 in. lbs.) torque. The degree scale on SET SYNC screen of DRB is referring to fuel synchronization only. It is not referring to ignition timing. Because of this, do not attempt to adjust ignition timing using this method. Rotating distributor will have no effect on ignition timing. All ignition timing values are controlled by powertrain control module (PCM). After testing, install air cleaner assembly.
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Re: 1999 5.9L Fuel Sync
[Re: DustyChicken]
#3072810
08/31/22 04:11 AM
08/31/22 04:11 AM
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Joined: Dec 2009
Posts: 21,055 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 21,055
in a cattle trailer down by th...
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Correct synching procedure needs to be performed, but there was a TSB out about the distributor/oil pump drive gear bushing having excessive wear.
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'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Front and rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: 1999 5.9L Fuel Sync
[Re: Guitar Jones]
#3072813
08/31/22 06:51 AM
08/31/22 06:51 AM
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Joined: Jan 2021
Posts: 1,128 rust belt
Moparite
super stock
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super stock
Joined: Jan 2021
Posts: 1,128
rust belt
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I'm not sure if it's properly timed to no. 1 cylinder TDC though. So check it! Don't go by the marking because the outer ring on the balencer because it may have moved. Check you are on TDC #1 cylinder on the COMPRESSION STROKE Then set the distributor like this...
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Re: 1999 5.9L Fuel Sync
[Re: Moparite]
#3072831
08/31/22 08:42 AM
08/31/22 08:42 AM
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Joined: Jan 2003
Posts: 18,432 UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,432
UPPER MICHIGAN, MARQUETTE COUN...
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I'm not sure if it's properly timed to no. 1 cylinder TDC though. So check it! Don't go by the marking because the outer ring on the balencer because it may have moved. Check you are on TDC #1 cylinder on the COMPRESSION STROKE Then set the distributor like this... That just gets it in the ball park so it will run. Signal needs to be correctly set with a scan tool.
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Re: 1999 5.9L Fuel Sync
[Re: Moparite]
#3072860
08/31/22 10:13 AM
08/31/22 10:13 AM
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Joined: Sep 2005
Posts: 1,177 Santa Ana, CA
DustyChicken
OP
super stock
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OP
super stock
Joined: Sep 2005
Posts: 1,177
Santa Ana, CA
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I'm not sure if it's properly timed to no. 1 cylinder TDC though. So check it! Don't go by the marking because the outer ring on the balencer because it may have moved. The car is currently at my customer's house. This is some side work for me and a project car for him. I'll check it next time we get together. The distributor rotor did line up with that notch when the balancer was at TDC, though. Correct synching procedure needs to be performed, but there was a TSB out about the distributor/oil pump drive gear bushing having excessive wear. That is one of my theories, since the timing jumps around so much. The motor is a reman, not sure who built it. Who knows if they replaced the bushing or properly reamed it with the correct tool. Do you have the TSB number? Thanks for all the responses, it's given me some avenues to explore.
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Re: 1999 5.9L Fuel Sync
[Re: DustyChicken]
#3072957
08/31/22 04:23 PM
08/31/22 04:23 PM
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Joined: May 2003
Posts: 3,350 N.W. Florida
Fat_Mike
master
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master
Joined: May 2003
Posts: 3,350
N.W. Florida
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I'm not sure if it's properly timed to no. 1 cylinder TDC though. So check it! Don't go by the marking because the outer ring on the balencer because it may have moved. The car is currently at my customer's house. This is some side work for me and a project car for him. I'll check it next time we get together. The distributor rotor did line up with that notch when the balancer was at TDC, though. Correct synching procedure needs to be performed, but there was a TSB out about the distributor/oil pump drive gear bushing having excessive wear. That is one of my theories, since the timing jumps around so much. The motor is a reman, not sure who built it. Who knows if they replaced the bushing or properly reamed it with the correct tool. Do you have the TSB number? Thanks for all the responses, it's given me some avenues to explore. Apparently that's normal(?) in the OBD2 controlled Magnums. Read the last couple pages of this thread: https://board.moparts.org/ubbthread...43375/10/super-duper-mpg-318-part-2.html
Last edited by Fat_Mike; 08/31/22 04:24 PM.
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Re: 1999 5.9L Fuel Sync
[Re: Fat_Mike]
#3073138
09/01/22 06:50 AM
09/01/22 06:50 AM
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Joined: Jan 2021
Posts: 1,128 rust belt
Moparite
super stock
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super stock
Joined: Jan 2021
Posts: 1,128
rust belt
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That just gets it in the ball park so it will run. Signal needs to be correctly set with a scan tool. Actually what i posted is in the service manual, With a new timing chain it should work fine.
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