Discussion:
Car shaky after changing spark plugs
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Notasponge
2016-09-06 00:18:00 UTC
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I have a 1994 Chevy cavalier I just change the spark plugs and spark wires for
no reason just to make it run a lil better the wires are in the right spot the
gap is correct the plugs and wires are all seated correctly I did not install
them incorrectly so please don't try to tell me to double check I have already
my grandpa says it is a bad coil lack but I don't know how much I trust that
since the car was working perfectly before I changed all the wires and spark
plugs and the spark plugs and wires are the right kind now my engine kinda
sputters and shakes and hesitates when I start it I've also lost quite a bit
of power any ideas on what's wrong I'm open to any advice here

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Paul in Houston TX
2016-09-06 03:39:42 UTC
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Post by Notasponge
I have a 1994 Chevy cavalier I just change the spark plugs and spark wires for
no reason just to make it run a lil better the wires are in the right spot the
gap is correct the plugs and wires are all seated correctly I did not install
them incorrectly so please don't try to tell me to double check I have already
my grandpa says it is a bad coil lack but I don't know how much I trust that
since the car was working perfectly before I changed all the wires and spark
plugs and the spark plugs and wires are the right kind now my engine kinda
sputters and shakes and hesitates when I start it I've also lost quite a bit
of power any ideas on what's wrong I'm open to any advice here
First, I would try to narrow down which cylinder.
It's easiest with engine running. You will need insulated pliers or
plastic pliers, plastic tongs, etc.
Pull one wire at a time and see if it makes a difference, then put back on.
When you pull the wire that does not change the rpm then that is the
wire/plug/coil that is bad.
You can also do it with engine off. Pull wire, see if it runs, etc.
Once you narrow it down then ohm the wire.
If no ohmmeter, then see if it sparks to ground.
This assumes nothing else is wrong, like vac leak, maf leak, etc.
Ed Pawlowski
2016-09-06 10:04:50 UTC
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On Tue, 06 Sep 2016 00:18:00 +0000, Notasponge
Post by Notasponge
I have a 1994 Chevy cavalier I just change the spark plugs and spark wires for
no reason just to make it run a lil better the wires are in the right spot the
gap is correct the plugs and wires are all seated correctly I did not install
them incorrectly so please don't try to tell me to double check I have already
my grandpa says it is a bad coil lack but I don't know how much I trust that
since the car was working perfectly before I changed all the wires and spark
plugs and the spark plugs and wires are the right kind now my engine kinda
sputters and shakes and hesitates when I start it I've also lost quite a bit
of power any ideas on what's wrong I'm open to any advice here
Gramps may be right. Pulling off the wires you may have damaged one
or otherwise broken a connection. Could have even cracked a plug.
Follow the instructions in the other post to narrow down which one it
is.

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