Timing marks
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- Posts: 4
- Joined: May 19th, 2017, 7:35 am
- Stroker Displacement: 4.7
- Vehicle Year: 1988
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
Timing marks
Hi everyone, kinda new to the forum but have had jeeps for 30 plus years. Latest is an 88 Cherokee thta I bought 10 years ago. I built a 94 4.0 into a stroker for it 5 years ago. Well the short rod stoker I built ate the piston skirts so I'm building it again with help from Russ this time. Anyway back to my stupid question. Why does this engine have timing marks graduated from 0 to 24 degrees on the timing chain cover when the distributor is fixed?
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- Strong Poster
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- Vehicle Year: 2000
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- Vehicle Model: Cherokee
Re: Timing marks
Wes,
Just because you drop the distributor in a fixed location doesn't mean it doesn't have a timing curve.
Just because you drop the distributor in a fixed location doesn't mean it doesn't have a timing curve.
- Cheromaniac
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- Vehicle Year: 1992
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- Vehicle Model: Cherokee
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Re: Timing marks
The positioning of the distributor has no effect on the ignition timing but it's critical for proper synchronization of fuel injector firing with the spark, and that's determined by the signal the ECU receives from the cam position sensor that's housed inside the distributor.
1992 XJ 4.6 I6 - 5MT - Stroker build-up, Stroker "recipes" Sold
1995 Mustang GT - 4AT - Modded Sold
2006 Mustang GT - 5MT - Modded Midlife Crisis Car
1995 Mustang GT - 4AT - Modded Sold
2006 Mustang GT - 5MT - Modded Midlife Crisis Car
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- Posts: 4
- Joined: May 19th, 2017, 7:35 am
- Stroker Displacement: 4.7
- Vehicle Year: 1988
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
Re: Timing marks
I guess my point is why have the timing marks when it can't be adjusted.
- Cheromaniac
- I live here
- Posts: 3181
- Joined: March 8th, 2008, 12:58 pm
- Stroker Displacement: 4563cc
- Vehicle Year: 1992
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
- Location: Cyprus
- Contact:
Re: Timing marks
To enable you to verify the base timing when you attach a strobe light to the no.1 spark plug lead.
There IS a way to advance the base timing, and that's to slot the crank position sensor bolt holes and move the sensor counterclockwise relative to the flywheel/flexplate as viewed from the front.
There IS a way to advance the base timing, and that's to slot the crank position sensor bolt holes and move the sensor counterclockwise relative to the flywheel/flexplate as viewed from the front.
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Re: Timing marks
One answer is that the timing cover is an old left over part that is pre fuel injection.
A carry over part if you wish. Tooling was paid for years ago.
A carry over part if you wish. Tooling was paid for years ago.
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