light throttle stumble

[stang_racer20]

Originally posted by kvanderstel
I've noticed this is getting worse over the last few days.

If I drive at steady/light throttle is get this stumble, if I give more throttle is seems fine, as soon as I back off to a light throttle again it starts to stumble again.

I havn't done any of the usual tune up stuff yet I was just wondering if anyone had any likely places to start.

I am having the exact problem in my truck right now, most likely a misfire. Under very light throttle or a steady speed the truck would jerk/stumble. I thought without a doubt it was the plugs until just today. I started it this morning and idled for about 3 seconds. Then just like that it died and wouldnt start. It cranks like theres no tomorrow(new starter), but it wont fire whatsoever. I'm going out tomorrow to see what I can find out. I'll let ya know if I find my problem. Let me know if you figure yours out too!