TrevorC

when I'm under light acceleration the car hesitates at around 2.8k - 3k rpms (no boost), but when I'm in light boost or WOT (full boost) it doesn't do it at all & drives fine?

kind bucks the whole car when it happens, scary....=O(


what do you guys think it could be?

caredden

iTrader: (148)

This is probably one of the most common topics in this forum. Please use the "search" function in this section. You can also find info in the "stickies" at the top of this forum.

https://www.rx7club.com/search.php?searchid=1655611

dgeesaman

iTrader: (7)

It's called the '3k hesitation'. I think it's covered in the FAQ, and certainly on other threads and sites. It's annoying but harmless.

The solution for a stock ECU is to clean and/or upgrade your engine grounds, or simply use a standalone ECU like a PFC.

Dave

FDZero

iTrader: (10)

...my bucks too but only when headlights (!) are on and if it's cold out...stops though after car is fully warmed up. Gonna' get most of this and among other quirks fixed later next month...I hope.

TrevorC

I have he PFsupercars.com piggy back system.....but it's currently untuned right now. I dunno how to tune it. =O(

Johnsrx7

sell the purple peter motor eater and buy a PFC. That system will only make the hesitation more pronounced. The Power FC gets rid of it.

petros_rx7

I have the same problem add some ground points with a thick cable direct from negative pole and you will be ok.
Also check the main fuse box and clean the contacts from fuses.

See and www.fd3s.net 3k hesitation

Sgtblue

iTrader: (16)

And at least in my experience.....even with improved and additional grounds, it will still hesitate a little before it's fully warmed up on a stock ECU.

TrevorC

lol, purple peter motor eater, haha!

whats wrong this this computer? Plus I don't have another $1000 to just dish out on another engine management system.....why not work with the one I already have?