I've got a miss in the #1 cylinder. I first pulled the plug and it looked very clean with a very slight brown hue, but the electrode was so clean it looked like it had just been pulled out of the box. The plug looked a little wet after the car had been ran so i figured the injector may be stuck open. I swapped injector with one out of a spare set i had and its still missing, changed plugs, and even swapped wires to different cylinder to see if it followed the wire but the miss still showed up in #1. Today i replaced the coil and its still missing. someone told me it was most likely the coil so i replaced it but it's still missing. Any ideas what else this could be?
98 Cobra, Miss in Cylinder #1
- Thread starter banks
- Start date
wmburns
SN Certified Technician
I am assuming this is a coil pack car. The coil pack pairing for the V8 is 1-6, 5-3, 4-7, and 8-2. For the V6 the pairing is 5-1, 3-4, 2-6.
The coil pack cars use a waste spark that fires on every TDC (exhaust and intake). The spark on the exhaust side doesn't do anything hence the term "waste spark".
SO........for this to be a problem with the coil pack itself (V8), then cylinder 6 AND 1 has to be affected. Interesting fact don't you agree?
Go back and focus on the things that can affect a single cylinder such as spark plug, spark plug wire, routing, or fuel injectors.
Just to humor me, have the alternator tested for excessive AC ripple. This can sometimes affect the accuracy of the cam sensor. The cam sensor is more likely to affect cylinder #1.
Consider swapping #1 and #6 at the coil pack to see where the misfire goes.
The coil pack cars use a waste spark that fires on every TDC (exhaust and intake). The spark on the exhaust side doesn't do anything hence the term "waste spark".
SO........for this to be a problem with the coil pack itself (V8), then cylinder 6 AND 1 has to be affected. Interesting fact don't you agree?
Go back and focus on the things that can affect a single cylinder such as spark plug, spark plug wire, routing, or fuel injectors.
Just to humor me, have the alternator tested for excessive AC ripple. This can sometimes affect the accuracy of the cam sensor. The cam sensor is more likely to affect cylinder #1.
Consider swapping #1 and #6 at the coil pack to see where the misfire goes.
trinity_gt
10 Year Member
hotcobra03
Active Member
miss
look again at what you are doing,,,there is always two sides to a story...
the things you have done is only 1 side of cylinder//as suggested compression test will check the other side...
than you have codes...what were the codes? all of them if more than 1
now the codes come from a voltage signal...moving parts around doesnt always change signal..
but like with the coil..you can change sides and if its the coil the code should follow ...
look again at what you are doing,,,there is always two sides to a story...
the things you have done is only 1 side of cylinder//as suggested compression test will check the other side...
than you have codes...what were the codes? all of them if more than 1
now the codes come from a voltage signal...moving parts around doesnt always change signal..
but like with the coil..you can change sides and if its the coil the code should follow ...
Similar threads
