GruvyTune

hey.
engine is running fine after the rebuild. i get a funny loping thing going on at idle. i get a pretty good and steady idle at most times dead on at 750 then other times i get a loping up and down kind of rhythmic up and down 100 or so rpm. i have not yet fine tuned the hondata but i'm running open loop on my original fuel maps. wideband showing maybe just a tad rich.

I see my tps reads about .53 V (about 2-3%). its always read about that anyways and never caused a problem. other peoples cars i have tuned i have seen anywhere from 0.46 to 0.55.

any ideas? vacuum is good, no signs of leaking.

torin

Spade

Stock cam??? If not, it's probably your cam.

GruvyTune

no, stock cams just new pistons, rods and headgasket/studs. had new valve seals put in too.

any ideas about what can cause a funny idle loping like that? I get no cel and the hondata has a green light and hondalogger shows nothing suspicious.

GruvyTune

seems like it was my tps. i never changed its position before but somehow my new built engine is sensitive to the voltage there being off a bit. voltage was 0.55. i wacked it with a hammer a few times to move it and got it to 0.49 and that seems to have solved the surging idle.