engine "buck" under acceleration

[SnowDrift]

I've got this "buck" under acceleration. It happens more frequently when the engine is warmed up, but is getting to where it happens almost all the time. This happened about a year and a half ago and I replaced the plugs and wires. This cured the problem, but it's back. Could a failing coil cause this misfire symptom to fail plugs and/or wires?

 

Just seems strange that the same symptoms are occuring in less than 15,000 miles.

 

Thanks,

SnowDrift

[Vegeta]

year and engine would help.

[RedGTP]

check your PCV valve .. with my GTP in accelleration .. a 3500 4000 rpm.. my engine 'bucked' lol

change my PCV valve .. and now it's run #1 !

[fargo_182]

If you have a DOHC changing the wires and plugs is usually a yearly job. They don't call these engines high maintenance for nothing.

Start your car in the dark, as pitch black as possible. Squirt some water with a spray bottle on the wires, if you see them arcing off each other they need to be changed(little lightning bolts).

The engine bay gets so warm they dry out and crack, good time to change the plugs as well.

 

Around here we change our plugs every 6 months, for how much they cost and the time it takes to do, it's really not that bad.

[94CutlassSLCoupe]

have you replaced your fuel filter recently? ususally fuel starvation as a result of that causes a whole bunch of drivablity issues such as bucking

[cbass]

If you have a DOHC changing the wires and plugs is usually a yearly job. They don't call these engines high maintenance for nothing.

Start your car in the dark, as pitch black as possible. Squirt some water with a spray bottle on the wires, if you see them arcing off each other they need to be changed(little lightning bolts).

The engine bay gets so warm they dry out and crack, good time to change the plugs as well.

 

Yearly? I get new plugs every 3 months or so. Wires arcing isn't a problem that should happen within a year on a normal engine unless somebody uses cheap wires. I suggest a silicone outer layer.

 

And how old are your oxygen sensors? Fresh ones every once in a while never hurt anything.

[SnowDrift]

Man, I can't believe I did that! Sorry, guys - it's a '93 GP Special Edition with a 3.1.

 

No, I have not ever replaced the fuel filter in the years I've had it. I've soaked it for about 13-14 months to try to loosen up the threads, but they're solid (thanks Ohio salt belt members). That was my first thought way back when I replaced the plugs and wires, too, but it wasn't the case.

 

Either way, I understand there is a repair kit for the filter, so I will probably go ahead and buy the kit and filter and eliminate the possibility.

 

Thanks again,

SnowDrift

[94CutlassSLCoupe]

Yep...Napa sells the fuel filter line repair kit...its about $15...you have to bend it into the proper shape though (kinda tough) and then use the compression fitting after you cut your line. It worked well, as we had to use on on my Sister's '94 Cutlass Supreme.

 

Once you change the fuel filter, dump in an entire bottle of Red Line fuel system cleaner (says it can treat 100 gallons of gas or all at once for a fast clean) and then fill up. My car used to have an off idle hesitation, but that is all but gone now because of a new filter and a bottle of Red Line Fuel system cleaner...total cost for me was about $12...so worth it