Replace distributor and module for 4.3 v6

[philbullet]

Serial num. OF28921 1993
4 barrel Carburator
counter balanc shaft.
vortex
ordered a replacment distributor because old one had some slack and may have been causing some timing issues/ backfiring.
received it but its different from original one and wont work with this module i belive.
no fire.
I dont have the part num. St the moment but the pick up sensor inside is different.
i believe the module and a new adapter harrness is need to work with this system now.
anyone have any input on this and can point me to the right module and harness if this is correct?

 

[philbullet]

On another not.
had change just the pick up sensor inside distributor but couldn't get any fire with the original module.
put back old pick up sensor and has fire.

 

[Rick Stephens]

Seems like this post needs some pictures of the distys in question or we're all mucking about in the dark.

 

[alldodge]

Your serial number prefix has it as a 93-95 4.3LX and uses a TB-4 distributor, part number 805185A37

https://www.mercruiserparts.com/bam/subassembly/31519/1599/50

Does the new sensor have 3 wires?

 

[Scott Danforth]

being a 1993, your motor is not a vortec headed motor unless someone changed the heads.

new sensor should have 3 wires, the third wire is ground

backfiring may be a lean sneeze, which is fuel system.

 

[Bondo]

being a 1993, your motor is not a vortec headed motor unless someone changed the heads.

Ayuh,...... Agreed,..... but the valve covers that say "Vortec" came out years before the Vortec heads did,......

 

[philbullet]

Yes we changed the block and heads

 

[philbullet]

Ok so it looks like i got the wrong distributor.i guess i got a TB 5 distributor?
if so can i just match up with the correct module and i assume ill need a adapter harness?
If it was easy to post pics on hers i would.
Ill give it a shot again

 

[achris]

TB-IV and TB-V distributors are exactly the same. The only difference between TB-IV and TB-V is the module. EVERYTHING else is the same. And they fit into both non-vortec and vortec intake manifolds.

New sensors have a ground wire, and as you can't buy TB-IV modules anymore, a new one will be a TB-V. If you ordered a TB-V module for your TB-IV system, you are going to have a problem hooking it up. To get the right parts, you should order according to the super-session part numbers.

The original number for the TB-IV module was -815361T1, which is now (TB-V) -15247T02, which includes the necessary wiring harness....

Chris.........

 

[philbullet]

Ok thanks

 

[philbullet]

Should the newer style distributor pick up sensor work with the older modules?
by the way the motor has beem running great after some other work that needed attention to.

 

[philbullet]

[No message]

 

[philbullet]

I findly got a pic of the module on the distributor to load up.
its all working good at the moment and i am stuck with a new distributor. Lol

 

[alldodge]

Should the newer style distributor pick up sensor work with the older modules?

Yes, old has 2 wires. new style has an additional ground wire

 

[achris]

Should the newer style distributor pick up sensor work with the older modules?

All your questions answered here...

http://forums.iboats.com/forum/engi...-mercruiser-thunderbolt-ignition-systems-work

Chris...........