Hey everyone so basically if im on the highway lightly accelerating between 50-70mph i get this stumbling with a slight rpm drop and fall between 50-100rpms. if i accelerate harder it goes away and i have no other idle or driveability issues.

I replaced the plugs and wires with acdelco brand and new air filter and fuel filter a few months ago . I also cleaned the maf and iac. no really sure if i should be looking more towards the engine or tranny. maybe bad o2 sensors or a vacuum leak or TPS

Its a '97 3.1L with 92k

thanks if anyone can help

 

Is it possible that its just the torque converter coming and going? or maybe going in and out of overdrive, but thats usually more than 100rpms.

 

Could be a lot of things. Is the SES light on? Could be a plugged cat, bad gas... Or a tranny issue as mentioned above, with the torque converter or maybe a tranny solenoid. Couldn't hurt to check your tranny fluid.

 

Thanks for the ideas guys I'm gunna run my obdii scanner on it Friday to see it i can get some more info

 

I noticed the same problem with mine yesterday, but I haven't done plugs or fuel filter yet.

 

Fuel pump? I know when my fuel pump was going on my truck it bogged real bad in the 40-65 mph zone... I switched from the front tank to the rear and it completely stopped...

 

I googled the problem... Many different fixes, pcv valve, fuel regulator, fuel pump, o2 sensor, vacuum leak, map sensor , torque convertor , egr valve, coil packs, plate under coil packs, plug wires . I don't know were I'm gonna start at.

 

mwjames, just so you know what you're looking for if this does end up being the case: the plate under the coil packs is the Ignition Control Module.

 

thanks buddy

 

Any time, glad to help.