1992 3FE Distributor Rebuild Pickup Coil Installation

[Peak]

Hey Folks,

Got a new to me 1992 fj80 3F-E and am running through some rough idle diagnostics. I’m waiting for the factory service manual in the mail, but I’m just too excited and I’m wondering if anyone on here has encountered the same issue.

Here’s the question:

When the engine is at top dead center compression #1. Should the pick up coil projection be in direct alignment (point to) the pickup coil?

Note the offset between the pick up coil and the projection with the engine at TDC Compression.

Thanks in advance!

 

[White Stripe]

The distributor rotor should line up with the #1 terminal on the cap with engine at tdc.

 

[Peak]

The distributor rotor should line up with the #1 terminal on the cap with engine at tdc.

Thanks Whit Stripe. I’m asking about the pick up coil and projection not the rotor.

 

[jonheld]

From the 1991 FSM:

 

[jonheld]

FWIW, rough idle on a 3FE is almost always an air leak. The top half of the motor wants to be air tight. Make sure there's no cracks in the intake plenum. They will often crack when lifting the lid of the air cleaner, especially if it's 29 years old.
Here's a basic tune up guide:

General Tech - 3FE Tune Up Info

3FE Tune Up Info

forum.ih8mud.com

 

[Peak]

Thank you Jonheld. This is super helpful. I have found some cracks and am replacing the plenum for sure.

FWIW, rough idle on a 3FE is almost always an air leak. The top half of the motor wants to be air tight. Make sure there's no cracks in the intake plenum. They will often crack when lifting the lid of the air cleaner, especially if it's 29 years old.
Here's a basic tune up guide:

General Tech - 3FE Tune Up Info

3FE Tune Up Info

forum.ih8mud.com