Welcome Guest [Log In] [Register]
Posted ImageWelcome to the all new Geo Metro Forum. We hope you enjoy your visit.

You're currently viewing our forum as a guest. This means you are limited to certain areas of the board and there are features you can't use and images you can't see. Registration is simple, fast, and completely free. If you're already a member please log in to your account to access all of our features:

Join our community!




Username:   Password:
Add Reply
Might have a bad coil?
Topic Started: May 10 2011, 07:12 PM (1,468 Views)
metropuller
Member Avatar
Member
[ *  *  * ]
Cant seem to get the engine started.anyway of cking a coil? I havr powet goong to both leads on thr top of thr coil,buy dont hsvr any spark thst I can see or hesr when I crank it with the plug in its boot but out thr head. I tryied it that way thinkinh I woild see the spark jump..sorry posting from my phone
Offline Profile Quote Post Goto Top
 
Jittney
Anchorage 92 XFi

coil testing thread http://geometroforum.com/topic/3849665/1/
and part of mwebb's advice......
easy test is
pull the coil wire and hold it about 13mm from steel / ground

crank the starter
if the spark can jump the 13mm , your coil is good - if not bring the coil wire closer to ground until it does
if that distance is less than 8mm the coil should be tested with a scope to see
Offline Profile Quote Post Goto Top
 
metropuller
Member Avatar
Member
[ *  *  * ]
I did that and didnt get any spark.though maybe a relay or something else that might control that output of spark to the coil?
Offline Profile Quote Post Goto Top
 
Memphis metro


Ignition module within the distributor. Coils actually fail very seldom. Ignition modules are usually the culprit more so than coils. Check and verify all fuses are good.
Offline Profile Quote Post Goto Top
 
metropuller
Member Avatar
Member
[ *  *  * ]
enginedoctorgeo
May 11 2011, 08:40 AM
Ignition module within the distributor. Coils actually fail very seldom. Ignition modules are usually the culprit more so than coils. Check and verify all fuses are good.
Thats what I was thinking the module,if itsis bad would I have any power at all going to the two small wires on the coil? Reason I ask is I have power going to the coil but have no spark coming out.
Offline Profile Quote Post Goto Top
 
Woodie
Member Avatar


Both connections to the coil should have 12V on them. When the engine turns over, the computer will apply a ground to one of them in order to create a spark, so a test light will blink on and off as the engine turns. Problem is, at least ten different things have to be happening properly before the computer starts to apply that ground. One of which is that ignition module, or cam position sensor inside the distributor needs to be supplying a healthy "engine is turning over" signal to the computer.

Speaking of which, is your distributor rotor turning? A broken timing belt will keep you from having any spark (or compression).
Offline Profile Quote Post Goto Top
 
1 user reading this topic (1 Guest and 0 Anonymous)
« Previous Topic · Engine Tech & Diagnostics · Next Topic »
Add Reply