This is wots happend,week ago car went to hight revs 1500rpm,not come down,was told could be TPS.Went to a garage thay had a look said voltage was wrong on the TPS which need adjusted thay couldnt so thay put back on,and on i went,but on the way home the car started jumping by this i mean revs shot from say 1500 to 2500 back down to 1000 up to 2000 and so on,when finaly got home left the car.got my self another TPS and fitted it, drove it revs were still high 1500 but no jumping asked some ? and was told how to adjust my TPS to propper voltage,so went round my freinds and we got the TPS sitting at 0.44 which is ok.but still revs sitting at 1500 left his house and with in 30sec car was jumping same as before, got home and just had it running lifted bonnet,and started reving the engine at this point i notice i could hear iver a sucking noise or blowing noise comeing from the engine,which has made me beleave that this could probably now be a vacum problem.

What is your opinion on this and if vacum would this cause this prob ,and wot are the main hoses i should be looking out for and where,any help on this would be truely greatfull as i now have no hear left.:headvswal:headvswal:headvswal:headvswal

sounds like an air leak to me. Had the same problem on my 306.

 

So yea, I'd guess at air/vaccum leak somewhere!

1. Check the yellow connctor on top of your rad pipe coming from engine, if slightly corroded will play about with revs aswell. Clean with a file and some contact cleaner.

 

2. If the tps is correct, base idle may need adjusting.

http://www.300zx.co.uk/forums/forumdisplay.php?f=52

or search faq for adjusting base idle

 

3. Heres something i made for boost leaks taht might help.

http://www.300zx.co.uk/forums/showthread.php?t=115751&highlight=diy+boost

 

Stu

IAAV needs a clean i reckon bud

http://home.swipnet.se/e-solutions/IdleTech.html

 

cheers