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Do I Have A Boost Fault?

Hotr34

By Hotr34,
in Queensland

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Hotr34 Proficient

Hotr34

Posted
Posted

I have had an intercooler fitted and if im on the moterway and drop down to third at 80-100kmh and floor it, when i get to 5000rpm my moter cuts out for 1 sec and then kicks back in. When i turn my boost down it will not cut out but i have no power. Do u think my tap is faulty??? And I have no power FC. Please help

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https://www.sau.com.au/forums/topic/153180-do-i-have-a-boost-fault/
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Crimpage Community Regular

Crimpage

Posted
Posted

I have limited knowledge about this sort of problem, but it could be your spark plug gap is too far. The new amount of airflow from your intercooler / increased boost might be effecting it.

Search for that, there has been a number of posts on it.

Cheers,

Dave

Konrad Grand Master

Konrad

Posted
Posted
I have had an intercooler fitted and if im on the moterway and drop down to third at 80-100kmh and floor it, when i get to 5000rpm my moter cuts out for 1 sec and then kicks back in. When i turn my boost down it will not cut out but i have no power. Do u think my tap is faulty??? And I have no power FC. Please help

check all your hoseclamps to make sure they're tight, i had a similar problem and that was the cause

Keegs Grand Master

Keegs

Posted
Posted (edited)

what boost are you running (on high boost)? Is your car stock? Does it seem like its hitting a limiter? Btw this is more a forced induction section issue.

Edited by 33NIZ
Konrad Grand Master

Konrad

Posted
Posted
Sorry but hoseclamps to what? the tap?

everywhere but in my case it was the cooler piping itself, right before the throttle body :laugh: it was tight enogh to not blow the hose off completely but loose enough so that once it made above say 5psi it would spring a leak, all boost would go out and the motor would cut out for a sec

Col-GTSX Grand Master

Col-GTSX

Posted
Posted

You are hitting boost cut...

Either get an aftermarket ecu or an safc or similar piggyback ecu...

The car is basiclly cutting out due to an overboost error, the ecu is trying to save the engine...

So when you turn the boost down it does not cut out, and you have no power because you turned the boost down.... :(

Also search topics "Boost cut defender, fuel cut & boost cut"

There are many ways to combat it with out spending allot of money, but if you have a stock ecu id spend the money personally and buy a PFC straight away. Its not safe to run 12psi on a stock ecu with standard fuel maps...

Aif Collaborator

Aif

Posted
Posted

i had this when i got my FMIC installed, but it was because of a hose that goes from the boost sensor to the BOV had melted shut(caused boost spiking so engine was retarding itself). replaced hose and problem is fixed.

it was also recommended that i check my plugs,coils, get a ecu or piggy back AFC and get a tune.

also if u got a K&N filter they can get oil on ur AFM which can cause issues so u may want to look up the tutorial on cleaning your AFM :(

Keegs Grand Master

Keegs

Posted
Posted (edited)
You are hitting boost cut...

Either get an aftermarket ecu or an safc or similar piggyback ecu...

The car is basiclly cutting out due to an overboost error, the ecu is trying to save the engine...

So when you turn the boost down it does not cut out, and you have no power because you turned the boost down.... :(

Also search topics "Boost cut defender, fuel cut & boost cut"

There are many ways to combat it with out spending allot of money, but if you have a stock ecu id spend the money personally and buy a PFC straight away. Its not safe to run 12psi on a stock ecu with standard fuel maps...

Col has hit it on the head, this is why I asked what boost you were running and whether it feels like your cars hitting a limiter. I probably wouldn't be running in excess of 12psi all day anyway, especially not in this hot weather. Your car may be spiking as well, causing the ecu to boost cut but then when your boost falls back it allows it to go. Regardless, the only way to fix your problem is to do one of the things mentioned above, saving you money later will be to buy a pfc or safc at least.

Good Luck, Matt

Edited by 33NIZ
R334door Experienced

R334door

Posted
Posted
You are hitting boost cut...

Either get an aftermarket ecu or an safc or similar piggyback ecu...

The car is basiclly cutting out due to an overboost error, the ecu is trying to save the engine...

So when you turn the boost down it does not cut out, and you have no power because you turned the boost down.... :yes:

Also search topics "Boost cut defender, fuel cut & boost cut"

There are many ways to combat it with out spending allot of money, but if you have a stock ecu id spend the money personally and buy a PFC straight away. Its not safe to run 12psi on a stock ecu with standard fuel maps...

you beat me to it col, sure sounds like a boost cut.

markimak Grand Master

markimak

Posted
Posted

has someone mentioned fuel cut?

the ecu senses too much of fuel or air (boost) and cuts it. most likely when u just get it to full boost as it will spike.

PFC will fix.

i hit fuel cut on a CA18DET at 22psi.. well it was 22 as the guage went to 20psi :)

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