Stutters under load after new spark plugs?

[cobra101]

Hi,

I changed plugs and used the same plug/gap I have used to 70K miles.


Now, under 3500 or under load it hesitates/stutters and those moves on through the rpms.

not sure what else could have changed. I may restart the computer (disconnect batt for minutes). Or next week take plugs and regap a little wider. I am at about .036 running 14+ pounds of boost.

Arghhh.

Any help appreciated.

 

[Colt .45]

Make sure the wires are on the plug correctly.

 

[cobra101]

ok. will try that... I thought I pushed them firm but ya never know. any other thoughts Always welcome......

 

[Blueline]

You could try closing up the gap a bit but at 14 lbs you should be good at your present gap. Give it a shot around .032


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[Colt .45]

Any luck?

 

[1wild-horse]

did you drop one? crack in a coil boot you didn't see? Just recheck your work I'm sure you'll find it. Might just be coincidence that a coil is starting to go down. Bad luck but I've seen crazier sh!t. Also pay close attention you didnt catch a wire under the coil cover when putting them back on. Good luck.

 

[cobra101]

Hi,

Thanks for all your help and suggestions. Sorry for the delay with the conclusion.

So, The following day I re-did the job.

Bought 4 new plugs (to do one side with new plugs and eliminate a bad ne w plug issue). Regapped to .034 (but I know it ran great with the .036 I used in the past.).

Turns out, it seemed to be the wires coming off AFTER i put the cover plate on?

After toying with it... it appeared that the rubber boot/gromit that feeds the wires into the motor was off. Perhaps making it able to move around during driving.

Secured all wires and it has been fine for days, so I am all good.

It is a beast again

Thanks much,

-Cobra101

Ps. Scary because several motnhs ago I had the #7 Spark plug blow clearly out of the block. Luckily that was just a new coil and plug. The threads were NOT stripped. But #7 is certainly finicky.