technical problem,help!!

[howard?!]

to all the sifus out there,i just transplanted BT 6 speed to my car,and my problem is when my car rev til 4000rpm it's start to choke a bit and some power loss but if i rev it harder to 6000rpm then everything go back to normal.i'm quite confuse cause i'm a newbie in 4AGE engine.anyone knows what the problem?help please....

 

[caleb_5375]

check the spark plug or electrical things ....
maybe will help....

 

[vh-101]

wah BT 6 speed wor nice !! haha

 

[sache]

check the MAP system, wiring, any sensor also ECU. Anything could be the main distraction.

 

[Adeen]

haven't checked with ur mech..?

 

[n0th1n]

hi cam ka? hahhahhahha

 

[howard?!]

already check with my mech,he check the plug,ECU,wiring even the fuel pump,but still dunno wat is the problem...beside the choking,juz wanna know wat is the best piping size for the 4AGE?

 

[Jordy]

20V standard is 2.2" and 16valve is 2.0" hehehe

 

[chinozie]

raise up the fuel pressure higher then normal...

 

[howard?!]

if i'm using 2.3" piping is it ok?
increase fuel pressure meaning i need a fuel regulator is it?

 

[Jordy]

2.3" for 20V ok...no problem.

 

[sincere1]

oem japan piping 2.38" inner diameter
we talk in malaysia 2" or 2.2" or 2.5" all outer diameter
confuse people

 

[sincere1]

if i'm using 2.3" piping is it ok?
increase fuel pressure meaning i need a fuel regulator is it?

this topic had been discussed in the forum, pls search and refer

 

[sincere1]

my problem is when my car rev til 4000rpm it's start to choke a bit and some power loss

this is the behavior of 4age 20v engine. VVT engaged at 4k+rpm
see the dyno chat.

Join the TT and test drive ppl car to see whether the same problem occured
do a dyno to check the AFR

 

[burnner]

Good info man..

 

[chinozie]

sincere1 - yup it's a known issue...happened to me and GT20V...raise up the fuel pressure a bit...it's still there but not so severe...

but the questions is...
why the graph curved down during 4k rpm...
if you got a A/F meter...during that 4k, there's no reading for a few seconds...seems like it was too lean during that time...after a few second only then you will feel the power again...
why ?

 

[sincere1]

chinozie
why ?
i said: ????? ha ha ha

i will get my AFR chart to post it tomorrow
i dont know all 4age but i can say most stock 4age is lean at range of 4k-5krpm...need programmable ecu to solve this issue.
But you managed to solve it by raise up the fuel pressure...good info
Thanks

 

[n0th1n]

estimated 168 bhp
125 torque / lambda or boost? what is this?

143 whp
11.6 torque

132 whp and estimate 10.8torque

not bad. all setup are stock or got modd? all 6 speeder i believe.

that curve down, should be just before vvt kicks in. if see in small scale, will look like that. if bigger, u'll understand

 

[howard?!]

sincere1,is it all 20 valve comes with vvt?coz my header there don't have any vvt written on it lah...and when u guys tt usually and where is the avenue?