hqr180

got a 93 coupe ex. checked all vacuum lines and replaced pcv valve on brake booster. and still lobes between 900 and 1900 rpms. the only other thing that i can think of that i havnt checked is the IAC valve on the intake manny, if ayone has had this problem please hit me back. open to all sugestions at this point?????

rob...

ignition timing, vacuum leak or valve lash too tight. also check engine timing
look for leaking manifold gasket, or possible blown head gasket. to do a leakdown test find a fitting to compress air in your cylinders one at a time on tdc. an old spark plug with the center drilled out works good. check for leakage from cylinders next to each other by removing the plug and listening for air. also check radiator for bubbles and listen in oil fill. ignition on an eg should be 16deg +- 2deg. important to check valve lash between rocker arm and valve stem tip. while cold intake should be about .006" and exhaust should be about .008" to check engine timing set #1 cyl. to tdc and see if the arrow or "up" is directly up. also unplug your iacv if rpms drop to 450+- 50 it is function fine. did you get any codes? cel codes else where in this site.

EG8R

Hows the coolant level?

b18bcivic

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by skelly ed666 &raquo;</TD></TR><TR><TD CLASS="quote">Hows the coolant level?</TD></TR></TABLE>

hqr180

coolant levl is fine, no vacuum leaks and i still have to check the iacv. and im hopin i dont have a blown head gasket

hqr180

got it!!!!!!! it was the iacv under the throttle body, that spring inside was all fucked up, now my cars runnin nice and smooth, i think im gonna take her to the canyons now!!!!!!!!

hqrcrx

man here u go again wantin to go canyons!