| 1) Do vacuum test at port downstream of throttle body. Look at the balance tube for port that supplies the AIV's snd disconnect that and plug vac gage in or put a T in the vac line if not sure. At idle a steady reading in the range of about 19 to 21" Hg should be present if OK. If needle vibrates al lot at +/- 0.5"Hg that could be valve guides. Low readings could be rings. Vacuum gage will reveal clooged exhaust. Here are descriptions of the various vac readings ................................. [ http://www.atlanticz.ca/zclub/techtips/vacuum/ ] 2) Pick a trouble procedure and follow up [ http://300zx-twinturbo.com/cgi-bin/manual.cgi?list=efec&dir=&config=&refresh=&direction=forward&scale=0&cycle=off&slide=42&design=default&total=190 ] 3) Do a compression and leakdown test if above doesn't fix it.
report back results of above tests
ZUL8TR in Orlando,FL |
