Timing marks

Tiny
RJM3218@GMAIL.COM
  • MEMBER
  • 1992 PLYMOUTH ACCLAIM
  • 2.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
Aamco replaced the timing then told me I had to adjust the distributor for the new belt. Okay, where are the timing marks on the balancer and how many degrees from TDC is it suppose to be? The car now stalls in reverse and in drive when stopped at a light. It idles down and stalls. Starts fine, runs fine until you put in gear. Help!
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Saturday, September 1st, 2018 AT 6:41 PM

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Tiny
CARADIODOC
  • EXPERT
Timing marks are on the flex plate at the rear of the engine. If it is not already missing, there is a black foam rubber plug to remove so you can see the marks. That plug is strictly to reduce noise, so it is no big deal if it is missing.

If distributor timing was correct with the old timing belt, it is correct now. It is run by an intermediate shaft/balance shaft. If that was not set correctly with the new belt, you would have a miserable engine vibration. The better suspect that fits exactly the stalling symptoms you described is a common problem after the battery was disconnected. You need to meet the driving conditions for "minimum throttle" to be relearned by the Engine Computer before it will know when it must be in control of idle speed. Until that is done, the engine may not start and run unless you hold the accelerator pedal down 1/4", you will not get the nice idle flare-up to 1,500 rpm at start-up, and it will tend to stall at stop signs. To meet the conditions for the relearn to take place, drive at highway speed with the engine warmed up, then coast for at least seven seconds without touching the pedals.

This drawing shows how the timing marks will look when you are standing next to the left front tire, looking over to the transmission's bell housing, right near the top, rear of the engine.
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Saturday, September 1st, 2018 AT 9:26 PM
Tiny
RJM3218@GMAIL.COM
  • MEMBER
Okay, thank you. So what should it be when I connect the timing probe?
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Sunday, September 2nd, 2018 AT 8:13 AM
Tiny
CARADIODOC
  • EXPERT
Some dummy was too stupid to list the timing in his previous reply. It should be 12 degrees before top dead center. The timing probe port is strictly for the assembly line and I think for dealerships at one time. No one in the independent shops have anything to poke in there. I worked at a very nice family-owned Chrysler dealership for ten years in the 1990's, and never saw, used, or heard of a tool that used those ports. Even at the Chrysler schools, those were never mentioned. You and I get to use a timing light.

If your distributor still has a vacuum advance unit on it, you will need to disconnect and plug that hose. Right around this model year, they started going to computer-controlled ignition timing that was unaffected by turning the distributor. If you need to unplug or disable anything else to set ignition timing, it will be spelled out on the emissions sticker under the hood.
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Sunday, September 2nd, 2018 AT 9:57 PM

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