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speedo and vtec not working after gearbox swap.
Posted:
Sun Apr 27, 2014 5:24 pmby Scottyboiboi
Hello forum, this weekend i replaced my s9b lsd gearbox for a s80 lsd gearbox on my b16a2, also put a lightened flywheel in as well. When changing these i accidentally burst a hose and coolant leaked onto the connections of the speedo sensor that bolts onto the top of the gearbox. I didn't know this until i drove for several miles. The speedo didn't work to begin with then it starting coming and going. I thought leaving the connections to dry would eventually fix it but now it doesn't work at all. Another thing i noticed is that vtec seemed to only work when the speedo was working. Something to note is that i took the sensor for the speedo out of the s9b box and put it into the s80 so i don't know if this could be responsible for these problems. If anyone could give me advice or point me in the right direction it would be greatly appreciated.
Posted:
Mon Apr 28, 2014 2:24 amby teal_dx
I'd try the S80 VSS and see if that works. Hopefully nothing was shorted out due to getting damp.
Posted:
Mon Apr 28, 2014 6:42 amby Scottyboiboi
Suppose that's the next best thing to do, now just the problem of sourcing that exact part:p the coolant only sprayed onto the speedo sensor to be fair which is only 3 cables in a plug. Just seems weird that it would work for a while then just stop again.
Posted:
Mon Apr 28, 2014 7:35 amby ihavesol93
vtec is controlled by oil pressure, throttle pressure, and rpm. the rpm goes to the ecu first. then to the tach. if the tach doesnt work either will your vtec.
Posted:
Mon Apr 28, 2014 8:14 amby Scottyboiboi
So do you reckon if i got a working tach/speedo from an s80 box it should solve both problems? Still don't know if it was the coolant that has caused the tach to go faulty.
Posted:
Mon Apr 28, 2014 8:37 amby ihavesol93
i don't think the speedo is the problem, cause its only the speedo, or is it the speedo/tach/gas/temp. should be the vss
Posted:
Mon Apr 28, 2014 8:48 amby Scottyboiboi
Ye sorry i meant the vss not the speedo.
Posted:
Mon Apr 28, 2014 10:15 amby ihavesol93
does the speedo or tach go out when it happens?
Posted:
Mon Apr 28, 2014 10:38 amby Scottyboiboi
Speedo. Been doing more research on it and it seems to be a faulty vss sensor. Probably due to coolant being splashed onto it. This week gonna borrow a friends vss sensor and swap them to see if it works.
Posted:
Mon Apr 28, 2014 10:42 amby ihavesol93
do you still have the one on the old transmission?
Posted:
Mon Apr 28, 2014 11:53 amby Scottyboiboi
Nah i had to use it for the gearbox that i put on.
Posted:
Wed Apr 30, 2014 9:47 amby Scottyboiboi
Problem has been found. It actually turned out to be the plug that plugs into the vss sensor. It's a 3 pin plug but in closer inspection one of the pins had been corroded and broken off. Lickily a friend had a spare loom in which i could take a plug from. Swapped the new plug on, runs sweet as a nut. Speedo and vtec working perfectly