Engine Ground question

[88Stangboy]

I posted this in my other thread also....sorry...

But i was just simply wondering if the engine ground isn't sufficiently connected,if that alone could cause a mis-fire
condition? Ive had this bad, re-accuring mis-fire condition for about
5 months now and its starting to just piss me off more than anything.
Well, i've went through two ignition tune ups, plugs, wires, dizzy cap, etc.
Replaced the coil, checked all my ignition wires from my ignition box over and over. Checked my spark from coil, used a known good coil. Everything, the dizzy is fine, no play in the shaft. Now im starting to wonder about the engine ground, could it not be grounding well enough? Could that be causing the mis-fire?

 

[HISSIN50]

What I would do: Run down This list (Courtesy of JRichker) to make sure all your grounds are connected and in decent shape. All is lost without proper grounding.

Good luck.

 

[HISSIN50]

I forgot to ask if the misfire was consistant at all. If so, a cylinder balance test (part of the self-diagnostics) might be revealing.

Good luck.

 

[88Stangboy]

Its not really consistant, it comes and goes, mainly when you just jump on the throttle hard. it goes crazy. I do really need to go through my grounds and make sure they're all ok like you said. Thanks

 

[JimBowy]

you want to ensure you have good grounds regardless if a poor ground is causing your problems or not....

poor grounding can lead to all sorts of problems that are very hard to troubleshoot....

 

[Strype]

Also, You can help your main engine ground by bolting a battery cable or thick speaker wire from the front of the driver's side head (behind A/C) to the swaybar mounting area. I'll try to find the website if you're interested. My computer was reimaged recently but I might have it at home.

 

[88Stangboy]

Yea, ive had this problem for the last few months, ran the codes last may and nothing came up, i was like damn. I mean, its just annoying as hell, i have dumps so every little fart and burp can be heard and its annoying and the lack of power makes it no fun to drive either.

Where is the best place to hook the factory main engine ground from the fire wall?

 

[86bluecobra]

isn't there a nice spot off the side of the engine to the chassis on the passenger side. off a bolt that holds the starters power cable.

 

[88Stangboy]

isn't there a nice spot off the side of the engine to the chassis on the passenger side. off a bolt that holds the starters power cable.

Thanks, ill try that one. When i finally get time to actually spend 10 minutes working on it, busy, busy, busy

 

[8950HO]

You can run a ground from where the negative battery cable attatches to the engine block to the sway bar mounting bolts on the frame,or from the unused 7/16" threaded bolt hole on the front of the drivers side cylinder head to the same sway bar mounting bolts.

I would use 4ga wire.