flyinryan517

I was driving my truck today with the cruise set at 50 mph then used the cruise to speed up and it started to shuder for bout 5 sec until the rpms worked there way up then I tried it without the cruise and it was fine did the same thing with the cruise again 50 mph used the cruise to speed up and did the same thing any ideas

flyinryan517

Never mind does it without cruise to

Eric0508

spark plugs most likely

jb526

one or more of your COP's would be my guess.

flyinryan517

Ive changed the plugs not to long ago and im getting no check engine light is there a way to test the coils ?

flyinryan517

And the other weird thing is its under very light acceleration I can stomp on it and its fine

lewissa81

It is a misfire. When you changed the plugs, did you change the boots? If not, change the boots and clean the corrosion off of the spring contact inside the coil. Use dielectric grease when you put it back together. If you did change the boots, then try cleaning the coils. That might help. Unless the coils fail completely, there's not really a way to test them. If you have access to a code reader that can read mode $06 data, that will tell you which cylinders are misfiring. Most can't read mode $06 though, and none of the auto parts stores will.

flyinryan517

I didnt change the boots I have a code reader ill mess with it and see if it will do it if not ill change the boots and clean up the coils and go from there thanks guys

screamineagle

My bet is on a faulty coil.

BuYA

coils! going through this. its getting better. Changed the whole passenger side and its working. Now i am slowly changing the driver side ones.