Strange Hesitation/pause

[cefiro]

I have been having issues with my car going into R&R mode I installed a PFC recently and had it tuned (unigroup), now what I have noticed is two tings my car now has a hesitation/pause, almost light somethings cutting the power this comes every now and again I think its always been there but its only noticeable with the power FC (don't think its in the tune). My knock reading on the power FC will go as high as 112 but the engine light does NOT come on at all. I think this hesitation/pause has always been there, but possibly the tune has made the hesitation more noticeable. Its seems to only do it on light acceleration. And the knock reading wont go above 38 at any other time. I am thinking the fuel pump is on the way out???????? Also the engine light attached to the power fc knock system is set at 60 is there a way to check its on/set at 60. Any suggestions?????

[joeyjoejoejuniorshabadoo]

read the faq... should be in there

[GeeTR]

First up, I'd talk to Yavus about what he thinks about your hesitation, as he clearly would have noticed it.

What turbos have you got - surge maybe?

PFC's don't have RR.

112 knock is bad, don't do it.

Datalogit / power excel to check the knock flash setting.

Fuel pressure gauge should show a f.pump weakness.

Edited July 22, 2008 by GeeTR

[donkey]

hey my power fc did it also, light throttle doing about 60 kph or sitting on 110 kph, light throttle, hesitate/pause every 10 min of driving or so......

[GTR1993]

there was a whole thread about the slight hesitation, have a search for it. No real conclusion but some people think grounding is the issue.

[cefiro]

I have std turbos, I know Power Fc don't have R&R it was doing it on my std computer it just wasn't noticeable (cant think of any other reason I was having R&R too coincidental) and sometimes it will have this hesitation and not read any knock ???? i would have thought Yahulz would have picked it up as well but they wouldn't do a power run on very light throttle and its intermittent, and as I said the power fc is not reading knock and showing me on the dash light as I have never seen the engine light come on. Dont have datalogit. yeah i should give him a call but i dont think its got anything to do with his tune its an unrelated problem but he is the man to see. its just miles away from where i live.

[cefiro]

Found this thread http://www.skylinesaustralia.com/forums/My...p;hl=hesitation

Just finished a quick re grounding of the igniter pack, will see how I go.

Thanks

[paulr33]

both issues are covered in the PFC FAQ - its in my signature

[cefiro]

thanks Paul, I didnt read GTR1993 till after my post will be interesting to see if it fixes it.