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Sorry I forgot.
94 dakota 3.9L magnumEdit
I have learned that Chrysler used a DRB 2 scan tool. I don’t know if any other scan tools can also deal with reading OBDI motors. Apparently you don’t actually change anything with the tool you read it as you adjust something to set the Injector valve synchronization.
I may end up asking the dealer when I go in tomorrow for a steering wheel back cover recall.I take it you moved the distributor? see if this helps.
http://www.justanswer.com/dodge/0vwag-hello-1994-dodge-dakota-3-9-engine-remove.html
Missed my appointment so I never got to ask the dealer. I don’t think I did and well this thing had the lifter or valve noise from before I did all this work.(see prior posts) The idea is that its out of sync comes from a guy that specialises in Magnum motors. I was thinking it needed more, but it seems that eliminating this first is probably the best way to isolate the issue.
I have heard that volt meter method can be 6 degrees off. When I did the intake plenum I stood over the distributor and the mark lined up on between the distributor body, the switch plate, and the rotor. It’s still possible its a tiny bit off. I am going to reschedule the dealer and add ask that they check the sync.
I just spoke to two dealers and an independent mechanic. None of them seem to be aware of or willing tosimply “check the fuel injector synchronisation” in the way described in your link and in other places I have read about this.
IDK why but they seem confused by my desire to have it checked. When we discuss what they will do they just schpeel out the scripted long list of stuff scan tools look at and then say “depending on what we find..:” completely ignoring the “check fuel synchronisation” request that is the reason for scanning. When I point this out they get “confused” again and the one guy started getting attitude that I was pointing out he wasn’t addressing the issue. He also said if there was no check engine light there was no problem.
The other dealer was more helpful but couldn’t actually be specific about anything and contradicted himself. the independent guy said an OBDI wouldn’t have that kind of “data stream” to read.The issue that lead here is; I have had lifter & or valve noise and power loss under load since I bought it. I have fixed it up a lot and it is doing very well but I still get (to a lesser extent now) the lifter & or valve noise and power loss under load. I was thinking it might be the PCM because it improved a bit when I retaped the harness near the PCM and cleaned the contacts. During that search for a new PCM I spoke to a guy at Hughes Engines looking for a rec on where to look, he thought I should check the injector sync to be sure it was correct since I had done the Intake Manifold plenum before getting into PCM replacement.
It makes more sense to eliminate this first, that is how I get to being here and asking about fuel injector synchronisation.Am I off in asking for just that check? Should I be asking for some other more generalised kind of check that includes the injector sync?
I had the truck in for a recall and I was told the PS fluid was low. I filled it and the squeak is gone. So it was at least part of the serpentine squeak problem I mentioned in another post I realise as I write this.
I have found the Snap On MODIS will show the status of the injector sync and it actually has a “sync” function for the purpose. Apparently you hook it up and dial the dizzy down to zero out the reading. I don’t have the few thousand dollars necessary to buy one so I am still looking to get it done.
Thanks for the help College.Here are the instructions for doing what I am calling setting the fuel injector synchronisation with the Dealers DRB scanner.
CHECKING DISTRIBUTOR POSITION
To verify correct distributor rotational position, connect the DRB scan tool to the data link connector. The data link connector is located in the engine compartment. Gain access to the SET SYNC screen on the DRB.
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.
Follow the directions on the DRB screen and start the engine. With the engine running, the words IN RANGE should appear on the screen along with 0 degrees. This indicates correct distributor position.
If a plus (+) or a minus (-) is displayed next to the degree number. and/or the degree displayed is not zero, loosen but do not remove the distributor holddown clamp bolt. Rotate the distributor until IN RANGE appears on the screen. Continue to rotate the distributor until achieving as close to 0 degrees as possible. After adjustment, tighten clamp bolt to 22.5 Nm (200 in. lbs.) torque.
The degree scale on the SET SYNC screen of the 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 the distributor will have no effect on ignition timing. All ignition timing values are controlled by the powertrain control module (PCM).
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