How do I set up ignition/distributor timing on a 1998 Dodge Ram 1500 w/5.2L V8?? Thanks,guys

 

Is the distributor the only part not in time? Like you already have the motor put together just need to put the dizzy in? If so make sure your at TDC, you can verify by checking the number 1 cylinder rockers. If they're both down your good. Then just put the dizzy in so the rotor button faces the number 1 plug wire.

 

from what i have read i don't think the distributor affects the timing. i think the timing is controlled by the computer and the fuel is controlled by the distributor.

 

There is a procedure in the factory service manual for installing the distributor, basically just lining things up properly.

Distributor (cam sensor) controls injector timing.

 

Thanks guys for the quick response but maybe I should have worded the question differently. Is there any way of timing the ignition/distributor by the timing marks on the vibration damper & timing light or am I thinking too "old school". If it can be done with a light & rotating the distributor what would be the specs?? Thanks guys - I appreciate the help....

 

Yes and no. There is a procedure for aligning the distributor in relation to the marks on the damper, but that's it. You cannot use a timing light on these trucks because the PCM takes over and adjusts the timing. Moving the body does nothing. The only true way to adjust the timing is using a scanning tool.

 

OK, thanks for the info guys. I do have the OBD2 diagnostic tool if thats what you mean. Will that work for me??

 

Doubtful. Most diagnostic tools merely retrieve codes stored in the computer. A high dollar scanner/programmer is needed to actually report the timing and reprogram it.

Are you performing a fresh rebuild? Why do you feel the timing needs to be adjusted?

 

Ignition timing is controlled by the crankshaft position sensor. (ok, its controlled by the PCM, via the CKPS......) The distributor has nothing to do with ignition timing, you can turn it all you want, and timing won't change. What WILL change though, is injector timing. (when the injector fires in relation to camshaft timing.) There is a very narrow 'window of opportunity' for the injector to fire, to ensure that you get the correct amount of fuel into the chamber. Too far either way, and the engine simply won't run.

 

I was asked what leads me to believe that my timing is out...the engine is sluggish, it's a hog on gas & most of all - it has a distinctive "ping" at low to mid RPM. Back in the days before all of this high tech, high fallootin' ECM's, electronic timing, fuel injection, etc, these were all signs of timing too far advanced either by maladjustment of distributor timing or a streched timing chain. So moving the distributor won't help,eh?? And you don't think the OBD 2 tool will tell the story either. Now what?? I'm a poor man on a pension & can't afford any more expensive tools or even more expensive mechanics. Any other suggestions ?? Thaks, Guys - I really appreciate your input.