I have a random misfire code and did the normal checks like wires and plugs which are good. I have new injecters and coil packs as well so im sure it can be them... a buddy said maybe a crank sensor or cam sensor??? any advice would be very helpful thx.

David

 

A failing Crank Shaft Position sensor can certainly cause misfires and all kinds of other very weird **** to happen. You won't get an SES light until it totally fails either.

Go buy one and pop it in...if its not it take it back for a refund.

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I know you said you checked the sprak plug wires. But make double sure both ends are "snapped" into place on the plug and coil.

Also, could be a cracked spark plug. Leaky fuel injector.

Make sure that none of the spark plug wires are touching the exhaust manifold pipes....that will give you a misfire, especially at mid-higher rpms.

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check your fuel pressure ... a bad/weak pump can cause this also.

 

thanks guys!!!

 

what other weird **** because my rpm gauge some times doesn't work

 

Timing chain failure imminent.

 

Shame on you. Terrible advice.

 

Tach gets it's signal from the crank sensor.

 

I had the same thing, and my mechanic couldn't find anything obvious so he changed the plugs and it went away. Plugs didn't look all that bad either.

 

don`t forget to tell us what was wrong and what fixed it ^_^

 

i had all the wires and plugs off i should of just replaced the plugs. They looked fine so I put them back in only a few month old. NGK

btw I have a new timing chain on there so less likely its that...

 

Make sure the ground on your alternator is secure. Also check the positive lead that runs to your fuse box under the hood. If either of these is loose, it can cause the issues you are explaining.

One more thing, since you have changed the injectors.....I had this issue myself....the injector wiring was actually broken inside the insulation. This was causing intermittent misfires on 3 of my cylinders. The only way you can diagnose this is with a multimeter. You have to check for continuity from the injector plug back to the PCM.

 

good info thx!!!!!!!!!!!!

 

The problem was the cam sensor...

 

Cam sensor would have made sense- just saw this, as a Bad crank sensor will usually cause the car to die randomly, if it is going bad, not miss.

 

had problems again so I changed the CRANK SENSOR. I hope this is now the final fix for my misfire...