Question about ignition module
 

I have a Gen V 502 EFI motor. I want to replace the ignition module in my distributor. Do I have to use Mercruiser parts or can I get one at an autoparts store?

The pick up module in the dist?????
Use a Merc part. Sierra may make one, but I would stick with Merc.

Whats wrong with it????

Fixx
 

it is a gm distributor, if it reads GM on it just make sure you match it to the correct part number.

Gm Icm
 

Wells: DR133, DR135, DR138, DR140
Niehoff: DR408, DR410, DR411
Standard: LX339, LX340
Echlin: TP22, TP24, TP25
ACDelco: D1943A, D1948A, D1960A, D1978, D1980, D1984-A, D1990, D1993
Borg Warner: CBE25, CBE27, CBE28

Or as GM part numbers: 1987465, 1987466, 1989747, 5744006, 10469931, 10482827, 10482829, 10482831, 10482834, 10496048, 10496269, 10496541, 16129419, 16139369, 16139379. 16139389, 16139409, 16139879, 16140039.

If you are planning on replacing it, there must be a problem. The last one i bought (mercury) was sealed. I think the old style has exposed connections, which was my problem.

I've had some issues with when my engine warms up.

When I idle for a while and then go to get up on plane she starts to sound like shes going to stall and then does.

I googled Ignition Module and saw a lot of ppl having the same symptoms as I am having and they are replacing the Ignition Modules and fixing the problems.

I'm going to pull mine out and run it down to autozone and let them check it out. Although I would think it needs to be hot for it to start acting up.

Gm Icm
 

AutoZone tests are inconclusive.....!

Thx guys fo the part numbers . I wonder if those will be Ok as far as the rev limiter goes ?

Does it look like this?

Ive been buying the AC delco for a 1995 Corvette,cap and rotor also.Mine is a 2001 500efi.

I have been having a prob with corrosion on the pick up coil plug,the 2 prong one.

Fixx
 

Before you install the new module go to a western snowplow supplier and get a tube of their dielectric Greece,it has rust and corrosion inhibitors in it and will stop the corrosion..

I bought the CRC dielectric Greece and coated the plug and 2 post, after about 40hours its green,wouldnt even fire up.pulled it and cleaned it fired up then.



some more info http://www.megamanual.com/ms2/GM_7pinHEI.htm

Gm Icm
 

You do not have to be concerned with rev limit. The ECU takes control of rev limit.

the GM est dist like the module somebody posted have a special "marine" module with a specific timing curve and some(like mine) are designed to run without a computer, a std one will not advance, tried it a few years ago..

i have a complete used Gen VI EST Distributor listed in the swap meet i was chasing a problem with my boat and replaced the distributor to find out my fuel pressure regulator was bad

Thx So Much guys for the replys,,,,, I haven't had a chance to pull the Ing. Mod. yet and am hoping to get to that this week sometime. I will check it out and try to respond to the replys.