1998 Ford F150. Purchased a couple of weeks ago and have been doing some maintenance work on it. (Seafoam, changed oil, air filter, cleaned MAF sensor) One recurring problem is when driving, for a second or two, it feel like it loses power then then stablizes. This is especially prononucned when going over a bump. I have not had a tune up yet but intend to in the next month or so. Any thoughts on what may be causing this?

 

is it a studder in the engine or does it feel like it could be coming from the transmission? maybe run a scan test and see if theres any codes

 

More like from the engine. Transmission seems to shift fine and I was told the tranny was rebuilt a couple of years ago.

 

what engine do you have in your truck?

 

4.2L engine