Berks HFC's = Hesitation!!!
11-11-2008, 08:39 AM
#1
Berks HFC's = Hesitation!!!
Ok has happened 2-3 times. When I'm rolling in 1st gear very slow like 5mph if a gun if the car it hesitates something nasty almost like fuel cut. I accually lung foward in my seat. Has anyone had this issue before?? It also takes a good 2-3 seconds to downshift with I go WOT. I know these have a learing ECU and my wife drives it most oif the time and she never floors it I mean never. Could this be the issue. The car is freaking out when I dump it? there is NO CEL.. 
11-11-2008, 10:58 AM
#4
Interesting.. What year model Z?
I think I may know what you are talking about. I also have Berk HFCs and one time (and only one time) I was going to pass a slow car and when I got to the side, downshifted, gunned it and the car hesitated for a second and then resumed gunned power..
Other people who have test pipes also have reported incidences similar to yours and mine.
But like I said it only happened once to me and it never happens at the racetrack so I really never cared..
I think I may know what you are talking about. I also have Berk HFCs and one time (and only one time) I was going to pass a slow car and when I got to the side, downshifted, gunned it and the car hesitated for a second and then resumed gunned power..
Other people who have test pipes also have reported incidences similar to yours and mine.
But like I said it only happened once to me and it never happens at the racetrack so I really never cared..
11-11-2008, 11:05 AM
#5
I'm guessing that the high flow cats leaned out your gas mixture.<O
</O
<O</O
Once I put headers on a truck and had this problem. Since it was carbureted, all I had to do was drill out the jets in the carburetor.
<O</OOn a fuel injected engine like the -Z- has, you would need to richen the fuel mixture somehow. Perhaps you need a Utec.
<O</OThe good news is that it would probably give you more horsepower.<O</O<O</O
</O<O
</OOnce I put headers on a truck and had this problem. Since it was carbureted, all I had to do was drill out the jets in the carburetor.
<O
</OOn a fuel injected engine like the -Z- has, you would need to richen the fuel mixture somehow. Perhaps you need a Utec.<O
</OThe good news is that it would probably give you more horsepower.<O</O<O</O
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11-12-2008, 06:43 AM
#11
I will try this on tomorrow. But I was also told that these cars learn driving habits and a few others have said they had this issue after babying the car
(Cars were stock). I just did my first LOF Saturday at (1250 miles) also had been pretty easy on her. Just started really opening it up. So possiable driving it easy for the last month and a half and only driving in the city the car thinks I drive like Mrs.Dasiy.. So there are a few things I'm gonna try. I'm also just wating for funds to get reflashed..
(Cars were stock). I just did my first LOF Saturday at (1250 miles) also had been pretty easy on her. Just started really opening it up. So possiable driving it easy for the last month and a half and only driving in the city the car thinks I drive like Mrs.Dasiy.. So there are a few things I'm gonna try. I'm also just wating for funds to get reflashed..
11-12-2008, 08:44 AM
#12
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Think you might be experiencing the fuel cut that happens when you hit the rev limiter . It's happened to me several times including this morning . Happened when I was stock to now ( spacer , test pipes , catback) I'm hoping the Technosquare reflash will get rid of it.
What about the ECU adapting to driving habits??
11-12-2008, 07:31 PM
#15
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Just installing HFC or TP, there is nothing to do with ECU. Some people installed bigger piping size than berk's hfc, has no issue. You might wanna run to autozone and scan it, even you didn't get the light on. Or i will replace berk hfc to stock one and see.