View Full Version : ignition module

11-30-2007, 08:03 PM
hi all . been having an ongoin prob with the buick(89 3300).changed module last year ,ran fine 4 a while, started stalling and backfiring while driving,got a another used module, ran good couple months same problem,tried the sameold module i replaced and it ran fine again.whoops stalling and backfirin .now i'm waiting to get some cash 4 a new one but thought i'd try the old one again guess what?it runs like a top!still gonna buy a new one and keep these as back up just in case .o ya and put wingnuts on the screws for a quick change.thanks 4 readin my rant!

12-01-2007, 01:20 AM
Are you talking about the whole modual with coil packs? I've found that when they're going, they work when cold. Then as they warm up, misfires happen. Good idea on the wingnuts!

12-01-2007, 02:53 AM
....on going prob with module

How's your grounding? Double check, all of your engine's grounding.

Not related directly, but

Q: “We have a 1989 Chevrolet Caprice 5.7L that
has been burning out ignition coils. New plugs
and wires didn’t help. We even changed the cap
and rotor and checked the distributor ground
circuit all the way back to the battery negative
terminal. The coil still burns out at the primary
wire. What else should we be checking?”
Gene’s Super Service, Lincoln, IA

There is a grounding strap or wire that connects
between one of the ignition coil hold-down
screws on the laminations and the center
terminal of the three-connector wiring harness.
This circuit provides a ground connection to
the ignition coil secondary (black) wire, which
is connected to another hold-down screw.
This grounding wire or strap can be misplaced
or discarded during replacement of the ignition
coil or distributor cap. In this situation, the
ignition coil secondary winding is not grounded
and usually arcs a path to ground through the
ignition coil primary circuit, causing the failure
you described. Be sure to check the current
limiter in the ignition control module to be
sure it has not been damaged also.

Wells Manufacturing..

12-01-2007, 05:10 PM
Interesting 85_Ciera_Rebuild^^^

That makes sense, but I wouldn't have thought of that