Hi everyone and thanks in advance for reading this. I Drive a 2003 Mach 1. I am having an issue with acceleration of sorts. When I accelerate my car kinda lags a bit. I don't know why it does it. I have been told it has something to do with my ignition coils or something similar I was wondering what the best way was to check them. and if anyone has any other ideas.

 

Could be alot of things. First hing I always recommend is putting a bottle of Sea Foam in your tank. It cleans the fuel system out and is a cheap start to diagnosing issues.

 

I have been working on the issue all last summer. check ignition coils all seemed good all eight were around .07 ohms. It's like i have a misfire that wont go away. I have changed out all of my spark plugs to the Iridium IX which took care of the problem for awhile but it slowly came back.

The overall problem is still there when i accelerate my engine starts to miss then stops around 2 - 4k rpms and starts again after 4k. Sry it took so long to respond but thanks for the response from before.

 

The only time an ohms check of coils is any good is when a coil is shorted or open.
If a coil is breaking down under load, without the right equipment, the only choice you have is to replace it/them.

 

yes, but checking all the coils and having them all read .07 ohms means that there wasn't a short in them? or does the possible short only come up when there is an actual load on the coils?

 

When a coil is stressed as under load, it can temporarily short and cause a misfire.
And when measured with an ohmmeter read perfectly good that's why an ohmmeter check is not that reliable.

 

Ok so in what ways can i check things out to figure out where the missfire is coming from?

 

Without a scope to actually see the pattern of which cylinder is breaking down, the only choice I see is to start replacing a coil and switch until you hit it.