1497 replies to this topic

[The Batman]

I got a gasket if you need it nick

[Exmantaa]

 

Am I right in thinking the harrop has a built in gasket?

 

 

 

Ehh yeah, the Harrop normally has a simple o-ring gasket to the TB.

 

(@Smiley; yes, I now what to settings change in HPTuners. It's a calculation for throttle plate angle vs opening surface, so it needs to know the fitted throttle plate area. ;-) )

 

[siztenboots]

you need a gasket on the vacuum side at least, plus I also smear plenty of grease in the bolt holes to seal them

[Exmantaa]

Bolts are outside the gasket... 

 

You normally can see a vac leak in the logs; it tries to close the TB beyond normal idle value and if that is not enough the ecu will retard ignition...

 

But no idea on how the LS4 TB should normally behave.

[mige]

as far as I know, Lee has changed his I haven't seen any information that a rewire is required

I have it on Mine Works very Well same wiring as lsj throttle body

[NickB787]

as far as I know, Lee has changed his I haven't seen any information that a rewire is required

I have it on Mine Works very Well same wiring as lsj throttle body

thanks, I just checked the TB, I do have the harrop o ring seal in place, I made a temp gasket up, lost my ratchet down the front under tray, don't ask.. need to try it now

[siztenboots]

Bolts are outside the gasket... 

 

You normally can see a vac leak in the logs; it tries to close the TB beyond normal idle value and if that is not enough the ecu will retard ignition...

 

But no idea on how the LS4 TB should normally behave.

 

fair enough, on the LET aftermarket manifolds, the TB bolts going through in to intake manifold chamber

[NickB787]

right tried it and started, ran it idle but second I went to rev it died, started it again few turns required and left to idle and after about 25 seconds it died again. I am charging the battery now. tablet is flat so can't check the codes as soon as both are charged I will clear the codes I have and try again.

Edited by NickB777, 18 February 2015 - 10:48 AM.

[NickB787]

Bolts are outside the gasket...    You normally can see a vac leak in the logs; it tries to close the TB beyond normal idle value and if that is not enough the ecu will retard ignition...   But no idea on how the LS4 TB should normally behave.

will check the logs, I will log it on start, when the laptop is charged

[CHILL Gone DUTCH]

I would let the car fully warm up nick then give it a Rev

[NickB787]

it won't let me, died again but I did log it, will try to upload

[oakmere]

Double check the parameters when you connect the ECU to the pc. Still sounds like the ecu is using the LSJ settings. If you change any paramiters you have to save to the ecu permanently before they will take effect. If you just connect to the ECU and change the setting on the tablet it will not work!

[CHILL Gone DUTCH]

Double check the parameters when you connect the ECU to the pc. Still sounds like the ecu is using the LSJ settings. If you change any paramiters you have to save to the ecu permanently before they will take effect. If you just connect to the ECU and change the setting on the tablet it will not work!

Best way to check this nick is simply to read ECU to PC and then go to parameters Should already be on ls4 TB

Edited by CHILL Gone DUTCH, 18 February 2015 - 11:24 AM.

[NickB787]

log the ecu knows it's an LS4,

Edited by NickB777, 18 February 2015 - 11:30 AM.

[NickB787]

got to go out will look later,

[CHILL Gone DUTCH]

Did you change the air temp sensor nick ? You still have the Tmap selected

[NickB787]

I am running a Tmap in my setup

[CHILL Gone DUTCH]

I am running a Tmap in my setup

👍 just checking The only other thing I can think off nick, Is to put back the 68mm TB back in to the ECU and make it perminant and swapping back the TB back in Then try again instead it never loaded up correctly into the ecu ( ls4)

[CHILL Gone DUTCH]

Is the water injection ON If so turn it off

[NickB787]

water injection is off, Joe is being great and sending me another tb to try, as everything else is setup, I will try the TB first before going back to the old 68tb