05-21-2009, 04:48 PM
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#1
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GL Member
Join Date: Nov 2003
Location: Weaverville, NC
Posts: 398
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Crank Sensor or Coil Paks???
Anybody had a crank sensor go bad? If so, what were the symptoms leading up to the failure? Mine is starting to have like a miss in it and once it died at 60 mph but started back up and hasn't died since. Not sure if its the crank sensor or coils starting to die. Any ideas? Thanks guys.
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05-22-2009, 12:43 AM
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#2
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I poop alot
Join Date: Jul 2008
Location: Ravenna, Ohio
Posts: 852
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The crankshaft position sensor will (should) send out a code or at least send out a code from a miss fire due to the failing sensor. I had to replace the one on my'n and it was missing at all speeds. It was no easy job doing it in my garage.
Coil packs going bad would be close to the same thing but no code that I know of for failing coil. You could get a plug and pull each wire off one by one and check to make sure that your getting a good spark from each wire, helps to have another person to turn the car over as you will only need to car to turn over a couple of times.
But start by doing a FULL tune up, if you have not done one in the last year.
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05-22-2009, 01:11 AM
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#3
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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Quote:
Originally Posted by dbailey
Anybody had a crank sensor go bad? If so, what were the symptoms leading up to the failure? Mine is starting to have like a miss in it and once it died at 60 mph but started back up and hasn't died since. Not sure if its the crank sensor or coils starting to die. Any ideas? Thanks guys.
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Ign lock cyl.
The cyl is getting a weak signal from the cyl to the coil pack, it will need to be replaced.
Mine died at 60 MPH too, plus it was hard to start at times but not all the time.
Cost: parts and labor - $555
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2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
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05-22-2009, 07:28 AM
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#5
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GL Member
Join Date: Nov 2003
Location: Weaverville, NC
Posts: 398
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Thanks guys for the ideas. Will probably replace the coils first. What all do you do to do a FULL tuneup other than plugs, wires and a fuel filter?
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05-22-2009, 07:30 AM
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#6
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GL Member
Join Date: Nov 2003
Location: Weaverville, NC
Posts: 398
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Quote:
Originally Posted by Redog
Ign lock cyl.
The cyl is getting a weak signal from the cyl to the coil pack, it will need to be replaced.
Mine died at 60 MPH too, plus it was hard to start at times but not all the time.
Cost: parts and labor - $555
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Where is the ign lock cyl? Is it a DIY fix? Thanks.
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05-22-2009, 08:53 AM
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#7
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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Quote:
Originally Posted by dbailey
Where is the ign lock cyl? Is it a DIY fix? Thanks.
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It's where you put the key in to start the car.
The mod chip inside the cyl goes bad. This chip sends a signal to the coil pack saying the car is on. The signal cuts out and the car shuts off.
This is also the problem with the secruity light.
If you buy a new one, you'll have 2 different keys for your car. A good mech can "rekey" the new cyl to your old key, but the key will have to be freshly cut
DIY? I guess, but I would leave this to a pro. Good news is that the cost I mentioned above, is mostly the part. Labor is in the 2 hour range.
I would get the coil pack tested before you change it, I really don't think that's the problem and would hate to see you spend the money on a new coil pack
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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05-22-2009, 10:39 AM
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#8
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GL Member
Join Date: Nov 2003
Location: Weaverville, NC
Posts: 398
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Quote:
Originally Posted by Redog
It's where you put the key in to start the car.
The mod chip inside the cyl goes bad. This chip sends a signal to the coil pack saying the car is on. The signal cuts out and the car shuts off.
This is also the problem with the secruity light.
If you buy a new one, you'll have 2 different keys for your car. A good mech can "rekey" the new cyl to your old key, but the key will have to be freshly cut
DIY? I guess, but I would leave this to a pro. Good news is that the cost I mentioned above, is mostly the part. Labor is in the 2 hour range.
I would get the coil pack tested before you change it, I really don't think that's the problem and would hate to see you spend the money on a new coil pack
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Thanks Redog! How would you get a coil pack tested? As for my car dying, it only did it once and hasn't since. Just that slight miss in it at times especially under a slight load.
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05-22-2009, 01:06 PM
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#9
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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Primary and secondary resistance. I had a diagram somewhere around here...
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Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
2011 Saab 9-5 Turbo4 M6
2004 Corvette Convertible M6
1994 Chevy Beretta - Quad4/M5
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05-22-2009, 01:47 PM
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#10
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GL Member
Join Date: Nov 2003
Location: Weaverville, NC
Posts: 398
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Quote:
Originally Posted by Cliff8928
Primary and secondary resistance. I had a diagram somewhere around here...
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If you happen to find it and can let me know how you test it I'd highly appreciate it. Thanks.
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05-22-2009, 01:59 PM
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#11
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GX Member
Join Date: Jan 2008
Location: montreal
Posts: 197
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Quote:
Originally Posted by dbailey
Anybody had a crank sensor go bad? If so, what were the symptoms leading up to the failure? Mine is starting to have like a miss in it and once it died at 60 mph but started back up and hasn't died since. Not sure if its the crank sensor or coils starting to die. Any ideas? Thanks guys.
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do u run on less cylinders,if so,it could be the coil packs!
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05-22-2009, 02:51 PM
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#12
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GL Member
Join Date: Nov 2003
Location: Weaverville, NC
Posts: 398
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Quote:
Originally Posted by leoalero
do u run on less cylinders,if so,it could be the coil packs!
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Seems to be running smooth except for the intermittent misses. Was just thinking maybe the coil pack was dying a slow death or something.
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05-22-2009, 04:34 PM
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#13
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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It's possible, but my car was missing when my igntion lock cyl was taking a crap
__________________
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
www.facebook.com/kb0177
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