Markeje

Hey guys,
The other day, I noticed when I was in slow traffic and having to yo-yo the throttle a bit, that a dead spot occurred 2 separate times. It was so slight that I wasn't even sure if it was me doing it with my foot. I ignored it, but made note of it.
Well today on the way into work, after pulling away from a stop light, it did it again. This time it was VERY noticeable. I had no throttle for a second, and my foot was half way through the stroke of the pedal. The engine did not sputter or die either. I let up on the throttle, then pushed down a little and off it went without hesitation.

Thoughts? Throttle body dirty? It has 121K but the new motor has 11K on it now.

Oh and the FPDM Module was replaced last you by me, So I "should" be able to rule that out.

techrep

iTrader: (1)

could be dirty TB or Maf... easy stuff to clean

powerranger262

Search for pedal relearn process. I think it's called the "diamondbird trick" on this site. Something along the lines of putting the truck in the on position, and slowly pressing the throttle to the floor a few times.
I forgot exactly the steps, but you will find it with a search.

Markeje

I did the DB trick at lunch. I think I noticed a slight improvement in initial take off response.
I could not get the throttle to dead-zone like it did but we'll see. I'm sure it needs the TB and Maf cleaned. I don't recall doing that when we replaced the motor.

powerranger262

Yeah, give them a good cleaning, and I would do a fuel filter if you haven't already.
After that, I would look into a throttle position sensor issue.

Markeje

Thanks guys. I'll get get it them cleaned up and see what happens. I didn't have a hiccup today on the way into work, but I'm sure the problem just isn't going to away.
The throttle calibration seemed to make the the first 10% of the throttle more peppy after all though. It's a shame it has to be done every so often instead of just learning it to memory from what I understand of it.