89 460 EFI timing issue
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Joined: Feb 2019
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89 460 EFI timing issue
I found my TDC with using a screwdriver and used my finger in the plug hole to make sure I am at the top of the compression cycle.
The engine turns over hard like every three or four turns. When I have the distributor really advanced I can get the motor running. I retard the timing about 10-15 degrees while idle and I can get it super smooth and instant power at the pedal. When I turn the truck off and try to restart it, it can barely turn over and never fires. So I turn the distributor back where I had it before and can barely get it started again and I can do the same process all over again.
I put a timing light on it and when I get a smooth Idle and I am around 32 degrees. Why?
I have the same problem also when the SPOUT is disconnected.
The battery does 800 cold cranking amps and just took it out of my working 360 I drove yesterday. It turns that motor like a feather.
The engine has a powermaster high output starter.
The engine turns over hard like every three or four turns. When I have the distributor really advanced I can get the motor running. I retard the timing about 10-15 degrees while idle and I can get it super smooth and instant power at the pedal. When I turn the truck off and try to restart it, it can barely turn over and never fires. So I turn the distributor back where I had it before and can barely get it started again and I can do the same process all over again.
I put a timing light on it and when I get a smooth Idle and I am around 32 degrees. Why?
I have the same problem also when the SPOUT is disconnected.
The battery does 800 cold cranking amps and just took it out of my working 360 I drove yesterday. It turns that motor like a feather.
The engine has a powermaster high output starter.
Tuned
Joined: Sep 2014
Posts: 358
Likes: 7
From: Ky
Why were you trying to verify TDC?
To put it another way, if you recently had the distributor out, it may be installed one tooth off.
On the 89' motor with the distributor-mounted ICM, the module faces directly forward/just slightly to your right when the distributor is re-installed properly, and then, with the spout shorting plug removed, timing is set to 10 degrees BTDC.
The ICM should not be anywhere near the thermostat housing.
To put it another way, if you recently had the distributor out, it may be installed one tooth off.
On the 89' motor with the distributor-mounted ICM, the module faces directly forward/just slightly to your right when the distributor is re-installed properly, and then, with the spout shorting plug removed, timing is set to 10 degrees BTDC.
The ICM should not be anywhere near the thermostat housing.
Cargo Master
Joined: May 2001
Posts: 3,208
Likes: 13
Number one plug wire on distributor should be at approximately 1:00 looking at the distributor. Injection timing is determined by the distributor and being off can effect injector pulse. The more the distributor is turned Clockwise the more advanced the timg is. Hence the bucking on trying to start. Set the timing mark on the harmonic balancer to TDC. And see where everything is. Harmonic balances can slip but is pretty rare anymore.
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