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If your 91 Bonneville has spark why wont it start and just turn over could it be the ignition control modual it runs the fuel pump im told?
Wiki User
∙ 16y ago
The problem could be the ignition control module, but more often than not, when it cranks but won't start, it's that one or more coil packs has gone bad.
Sometimes, even though there IS spark leaving the cable, it's too weak to actually fire the plug properly.
Pull and test each plug wire (one at a time) by putting a screwdriver or similar object up inside the wire and holding the exposed metal near a ground so as to observe the spark that jumps the gap when the engine is turned over.
Simply put, an orange-colored spark is weak while a blue one is strong.
But don't completely rule out the lack-of-fuel possibility, either.
You can test the fuel pump by bleeding off the fuel system to relieve the pressure then cranking to see if it returns.
The bleeder valve is on the rear of the fuel rail under what looks like a tire valve-stem cap... try not to spill it all over the engine.
Wiki User
∙ 16y ago
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