Just Boosted...Trouble On Start Up

Gonzo

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#1
We just put a turbo on my buddy's GSR. We buttoned it up and started it up and it will idle but when you give it gas it will stall out unless you let it back down to idle. The car will rev and drop real quick like it has a vacuum leak but twice as fast and the valve cover breather is blowin air like mad....There is a sensor on the back that i have no idea what it is. I think it might be a knock sensor but im not sure. Its on the back of the block twards the top, above the oil pres sensor and the coolant tube that goes across the back of the block. Its not hooked up. Does the knock sensor (if it is) Have that much effect of the car?

Any help? Thanks
 

civic98turbo

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#2
any CEL?....a knock sensor will only activate after the 2nd radiator fan cycle...it doesn't come on right away
 


Gonzo

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#3
yea it will throw a light after a sec of running. I dont have a code reader tho
 

Winki

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#4
well if your not sure where the knock sensor is you probably shouldnt be messing with putting a turbo on the car:P.. but any who . is the ECU chiped for a boosted car?
 


got traction

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#5
^ x2 more info would be great
 

djrenok

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#6
so if i have a 99 civic and adding boost next wed. My mechanic broke my knock sensor taking the motor out but i was told when u turbo the car the OBD1 ECU wont even read the knock sensor, so it is pointless to purchase?? Can i just be good without it.....cuz its kinda expensive.
 

stealthy

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#7
you dont HAVE to have a knock sensor, but it will throw a cel if your ecu isnt made aware of it. what engine management do you have?

if its obd2 use a code reader, if its obd1 look up the DIY way to check it, atleast this way you will know exactly why its throwing a cel and go from there.

i really doubt a knock sensor would result in vacuum like issues though.
 

djrenok

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#8
well yeah i was told tho once i switch the ECU to a OBD1 P28 i wont even be able to use the knock sensor. So im just wondering do i replace it and spend the 180 on a new one or just leave it alone n go from there.......i dont have plans to going back to stock so im just wondering what I could do. And im running Crome pro EMS
 

stealthy

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#9
yeah, p28 wont recognize the knock anyways. recheck all of your vacuum lines for leaks or incorrect connections. if you have to, pull everything off and start all over.

and a sidenote, my knock sensor was broke by my machine shop during machine work, but i didnt replace it for the same reason, its not needed.
 

mr.eg $upreme

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#11
wat if u just get an ecu that can support the the controllers cpu and check over everything u did to put the turbo into the car recheck ur connects and see if ur wastegate was knocked loose
 

TiiM iiS l3eAsT

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#12
n00b ???^^^^
 

TiiM iiS l3eAsT

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#14
haha yea i read that whole thread......im sorry but how can someone be that dumb ??
 

mike@synapse

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#15
so if i have a 99 civic and adding boost next wed. My mechanic broke my knock sensor taking the motor out but i was told when u turbo the car the OBD1 ECU wont even read the knock sensor, so it is pointless to purchase?? Can i just be good without it.....cuz its kinda expensive.
not needed dont worry about it.
 

TiiM iiS l3eAsT

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#17
wtf lol??^^^
 

toneekay

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#20
WTFMOTHERUFUCKlNG THREAD JACK?



oh and the engine pic on renoks myspace, that bay looks VERY familiar..
 






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