Help w my 99 no start, have fuel and spark
#21
Ignition coil!
Turns out coil was not strong enough... Even though I had a blue spark... Now new prob. I temporarily hooked it up forgetting that it had to be grounded, drove for a mile and it shut down. Obviously I fried the coil, but I replaced and still no go... What did I mess up along with the coil???
#22
Turns out coil was not strong enough... Even though I had a blue spark... Now new prob. I temporarily hooked it up forgetting that it had to be grounded, drove for a mile and it shut down. Obviously I fried the coil, but I replaced and still no go... What did I mess up along with the coil???
#23
The ignition coil does not need to be grounded. The electrical connector to the coil supplies voltage and ground.
It is possible for an ignition coil to cause the ignition module to fail, and vice versa. As Burned mentioned, probably a good idea to check the ignition module. Keep in mind that the results from those testers are not 100% reliable.
It is possible for an ignition coil to cause the ignition module to fail, and vice versa. As Burned mentioned, probably a good idea to check the ignition module. Keep in mind that the results from those testers are not 100% reliable.
#24
The ignition coil does not need to be grounded. The electrical connector to the coil supplies voltage and ground.
It is possible for an ignition coil to cause the ignition module to fail, and vice versa. As Burned mentioned, probably a good idea to check the ignition module. Keep in mind that the results from those testers are not 100% reliable.
It is possible for an ignition coil to cause the ignition module to fail, and vice versa. As Burned mentioned, probably a good idea to check the ignition module. Keep in mind that the results from those testers are not 100% reliable.
I'll go get a icm tomorrow and try cause now I have no spark at the coil, the coil is new, and the auto store said my module was good but I take that with a grain of salt. So my prob has changed a lil but still, no start. If I have no spark now at the coil and that's brand new it must be the icm. Could I have maybe messed up the PCM? I read somewhere that I could have effected that when I burned out the coil.
#25
Guest
Posts: n/a
Absolutely positively nothing more frustrating then these intermittent problems.
Are you sure your getting voltage to the pink wire at the coil?
If it starts again run a tap wire from the pink wire to inside the cab and hook it to a multimeter . If the power drops out when it stalls, might be a place to look.
Just a thought.
Are you sure your getting voltage to the pink wire at the coil?
If it starts again run a tap wire from the pink wire to inside the cab and hook it to a multimeter . If the power drops out when it stalls, might be a place to look.
Just a thought.
#26
Thanks capt,
I'll go get a icm tomorrow and try cause now I have no spark at the coil, the coil is new, and the auto store said my module was good but I take that with a grain of salt. So my prob has changed a lil but still, no start. If I have no spark now at the coil and that's brand new it must be the icm. Could I have maybe messed up the PCM? I read somewhere that I could have effected that when I burned out the coil.
I'll go get a icm tomorrow and try cause now I have no spark at the coil, the coil is new, and the auto store said my module was good but I take that with a grain of salt. So my prob has changed a lil but still, no start. If I have no spark now at the coil and that's brand new it must be the icm. Could I have maybe messed up the PCM? I read somewhere that I could have effected that when I burned out the coil.
How to Test the GM Ignition Control Module
#27
Guest
Posts: n/a
nothing wrong with testing the icm but the pink wire with the key on has to be hot
This from Capt. Hook "DCV 20 volt range.
Test leads where they are in the image.
Hold the black probe to battery negative.
Hold the red probe to the pink wire on the ignition coil.
Have an assistant crank the starter while you watch voltage.
Also watch it when turning the ignition to the OFF position, (when you got the sputtering).
Post your results. "
__________________
This from Capt. Hook "DCV 20 volt range.
Test leads where they are in the image.
Hold the black probe to battery negative.
Hold the red probe to the pink wire on the ignition coil.
Have an assistant crank the starter while you watch voltage.
Also watch it when turning the ignition to the OFF position, (when you got the sputtering).
Post your results. "
__________________
If making guns illegal will take them off the street, why don't we make heroine and meth illegal too?
Last edited by spittybays; 06-13-2014 at 09:51 AM.
#28
nothing wrong with testing the icm but the pink wire with the key on has to be hot
This from Capt. Hook "DCV 20 volt range.
Test leads where they are in the image.
Hold the black probe to battery negative.
Hold the red probe to the pink wire on the ignition coil.
Have an assistant crank the starter while you watch voltage.
Also watch it when turning the ignition to the OFF position, (when you got the sputtering).
Post your results. "
__________________
This from Capt. Hook "DCV 20 volt range.
Test leads where they are in the image.
Hold the black probe to battery negative.
Hold the red probe to the pink wire on the ignition coil.
Have an assistant crank the starter while you watch voltage.
Also watch it when turning the ignition to the OFF position, (when you got the sputtering).
Post your results. "
__________________
If making guns illegal will take them off the street, why don't we make heroine and meth illegal too?
My brand new coil was bad, this one didn't work at all... Stupid Chinese parts.
It's always something stupid!
All that trouble and it was just not a strong enough spark... Even though I had a blue spark, and new coil just plain didn't work at all.
Thanks all for your help, and a special thanks to capt hook!
Of course I tried new parts on everything else... Except the coil cause I saw blue spark. All and all I didn't spend a ton of $. I needed a new distributor anyway the old one had seen better days, and the rotor!
Thanks a million u guys are awesome!
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