Syph

Hi guys I would like to pick your brains if I may.

It has happend to me a few times now and I`m not sure if its fuel cut or something a bit more serious.

I dont push my car very often but sometimes when I do I get a sudden loss of power and then it comes back. it feels a bit like a missfire and only happens when change gear at high revs between 5 and 7K.

is this typical of fuel cut?

the only mods that I`m aware of on this are a Kakimoto cat back and a bailey piston DV26.

I dont currently have a boost guage so I cant tell if its overboosting.

Any help or advice would be welcomed with open arms.

myblackwrx

iTrader: (1)

loss of power and your head nearly going through the windscreen

gozy1227

Ahh this is of interest to me, i have the same problem, a hesitation at around 5-7k, i have a boost gauge and and im not over boosting.

do you have a classic mate?

Syph

Thats a pretty good description of what I`m getting.

Damn could have saved myself a lot of typing

Syph

Yep! 94 import wrx.

its also still restricted to 112mph.

farely high milage at 197000K

myblackwrx

iTrader: (1)

With my car (93wrx) it would happen in the cold weather ,like we having now, so i cheated and got a later wrx ecu which had a better fuelling map and now mine is sorted.
Has it started since the cold spell?

gozy1227

Same here! 96 wrx import

had the restricter binned on mine!!

may be we can get to the bottom of this mystery........
how long you had the problem for?

myblackwrx

iTrader: (1)

gozy if you have no restrictor then you will get overboost ,it needs to be replaced

Syph

To be honest i`m not sure how long this has been happening for as Ive only had her for about 4months and genrally dont go over 100K. but as I`m getting more used to the handling a power delivery I push her a little more harder each time I do.

I first noticed it befor xmas tho and it wasnt that cold then.

gozy1227

removing the 112mph restricter? tell me more.......

myblackwrx

iTrader: (1)

Sorry i though you meant the restrictor in the pipework from the boost solenoid sorry.
Anyhoo have you not had your car delimited?

Syph

Not yet.

I`m sure Ill lose my licence if i do.

gozy1227

thats cool mate made me think

do you suffer from this problem if your shifting up thru the gears as well as if u nail it in say 2nd or 3rd?

myblackwrx

iTrader: (1)

i used to but since i've changed to the later model wrx ecu i don't get it anymore

gozy1227

what year/model ecu did you go from-to?

i have my96 wagon import, not sure what ecu off top of my head

myblackwrx

iTrader: (1)

i went from U8 (92-early 94 wrx saloon) to z4 (late 94-96 wrx saloon).

think your ecu is one of the following 1C,V5,V9 or 3B

gozy1227

cheers, thats something to look into,(il check which i have this afternoon)

would you know which ecu would be an idea for me to try?-dependant on which ecu i have, i guess, as its a jap wagon with the td04, so saloon ecu's are out, are my choices limited?

myblackwrx

iTrader: (1)

I believe all those ecus are basically the same (similar situation with the early saloons as there were U8,W6 and 2C all covering the 92-94 cars).

I would guess from post 3 in this thread where you said you're not overboosting i would guess that inspection of your plugs/coilpacks would be a place to start.

Peanuts

iTrader: (15)

fuel cut feels like hitting a brick wall

gozy1227

il be checking the this afternoon, i no the coil packs were replaced by the previous owner a few thousand km ago, so fingers crossed some new plugs may smooth it out, it does seem to be weather related with mine, but its not an issue all the time.

thanks for your input blackwrx

Syph

I plan for a full service this month so I`ll have the plugs changed then. but in the meantime is there anything else I should look at and is this damaging to my engine with it continuing on like this?