What Did I Break :s

[illusiVe]

I have an R34 GTT, and i was trying to unplug one of the boost lines so i could plug in the T piece and one of the plugs snapped, its attached to something labled 'turbo gauge' (i think) which goes to electronic plug.

cable is found right near the firewall, center of the car, just behind the factory strut brace.

basically, one of the tubes coming from just before the TB, it goes into a big round circle, red + black, then went into the plug i broke, then to an electronic sensor..which would go back to the ECU somewhere i think...

ill put up pics when i get home, car drives fine... boost gauge still works fine. just wanting to know if i should get it replaced or not to worry.

thanks for any usefull advice in advance

Edited April 7, 2006 by illusiVe

[Abo Bob]

I thought that was for the stock boost gauge but you say it still works? hmmm.

[illusiVe]

yer thats what i thought... at first i thought ooo sheez.. cause it was only 1 day old to me... but took it for a boost around, still drives exactly the same, it might have a secondary which it uses elsewhere in the engine bay..

ill post up a pic to make sure we are thinkin about the same item.

[Duncan]

wierd....I thought what adam thought. the gauge runs of the sender on the firewall. the input to the sender is the boost line.

If that boost line is split you should be getting eleventy billion pounds of boost. if the electric plug is broken you should be getting no reading?

got a pic?

[paulr33]

does the factory er34 system have a map sensor signal to the ecu

to detect boost pressure? not the gauge sender but one of the ecu

[illusiVe]

no idea.. pics up @ 2am... long day at the office...

[AFRO]

ya,, the r34's have a map sensor,,, its on a bracket off the firewall

located

i think u've broken the map sensor plug,, this sends boost pressure signal to the ECU. I have seen an r34 which had the Map sensor vacuum hose removed,dunno how it affected the performance or fuel economy,(but its probably best to get it fixed, since u want ur ecu to be reading correct boost pressure)

i've highlighted the map sensor in blue

[nuffsaid]

Same thing happened to when I was changing my plugs. Didnt notice it was there and snapped it when removing bits and pieces to get to the plugs.

With it broken, there was no effect on performance or anything, I didnt notice any strange in the car either.

Only thing was that the engine light came up because I disconnected the plug. But if you connect it and just leave the nozzle unattached, I think its fine.

You can try getting some liquid nails and gluing it back on, thats what I did. Worked a treat for me, but I ended up finding a GTT wreck and replaced mine in the end anyways.

A new sensor from Nissan will cost you apprx $150, well that was the quote I was given.

I know a few guys who have blocked off the hole that the hose from the MAP sensor would lead to, and some guys just leave it. No problems reported frmo them yet.

[illusiVe]

ill go with the tubing and glue gun idea

big thanks for the idea... and finally pic is up

[nuffsaid]

I used araldite, that glue that comes in 2 parts that you mix

dries up clear, and dries as pretty hard plastic, just get it all around the nozzle and the outside, cake it on

might be useful as hot glue guns arent that strong

just be careful and try not to get glue inside the hose

[AFRO]

how come ur hooking up ur boost guage at that point?

its easier to Tee off from where the factory boost guage gets its pressure from (off the intake manifold)

[illusiVe]

will do.. ill make sure i take it off before i start to glue..

i plugged it in there.. because i saw the word 'boost' and it looked like it would work.. NFI where else i'd have plugged it in..

[AFRO]

have showed the factory boost sensor and its vacuum hose (coloured red)

i suggest u replace this vacuum hose coz it will be old and hard (it might be a bit hard to remove from the sensor and off the manifold (don't break sensor plug also,, haha),,,, i replaced mine,coz it was all hard and old (even though it only had 20K kms on it,,, took hose to autobarn and they matched one up for me,,, like $5 or something,,

ask them to give u a tee piece to suit ,,,

[illusiVe]

thanks mr sexy pants

[Abo Bob]

That's the hose that split on me causing an overboost and blew my engine.

[nuffsaid]

Abo: what kind of overboost are we speaking of here? with my full exhaust and a cold night, im getting close to like 0.9kg/cm on the stock boost gauge, dont know how accurate that is though

[illusiVe]

my boost gauge (factory) shows 1 bar yet my boost gauges no matter where i mount it in the engine bay shows 12 psi