Outer Limits 4x4 Board

i just fitted an intercooler on my 1kz-te and it drives great but now it idles with -2 of vacumn pressure and when i gear down when i come of the clutch it goes to -10 for a split second then back again when i am off the clutch. also when i turn the car off it goes to -20 of vacumn for a second then back to 0 when the car is off. now i am confused diesels dont have vecumn so why is mine all stuffed up all over the place ???? any ideas

restriction

A kzte engine has a butterfly in the inlet manifold that is almost closed at idle, as well as being fully shut when stopping the engine. You have obviously fitted a dual reading gauge and are now seeing this. Or you have a very restritive i/c.

Hope this helps

Andy

Sounds perfectly normal to me. My 2.4 does the same. The reason you get more vacuum on engine shutdown if the 1KZ-TE has the same small butterfly as the 2.4 is because this closes on engine shutdown as well as the main butterfly.

Nev

ah ok no worries i wont panic then the car still runs fine but i was just a bit unsure you know the whole diesels dont have vacumn thing anyway thanks heaps

why other vechiles don't often see vacum is due to the EGR being open when the butterfly is partially closed.

you obviously have the EGR blocked.

by any chance when you fitted the intercooler did you remove the TPS? if the TPS is not correctly adjusted it can alter when the emmision system works.

whats the tps ?... i dont think i have ,i havent had to move anything all i did was piping from the turbo inercooler and to the engine nothing had top be relocated anywhere if thats when you talkin about ???

Throttle Position Sensor. Located on intake elbow opposite throttle cable linkage.

Nev