Expert Needed
Printed From: West Coast Fieros
Category: Technical Topics Forum
Forum Name: Technical Questions and Discussions
Forum Description: Got a technical question about your fiero? ask it here.
URL: http://www.westcoastfieros.com/forum/forum_posts.asp?TID=1527
Printed Date: 01 December 2024 at 2:55am
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: Expert Needed
Posted By: Roadfury
Subject: Expert Needed
Date Posted: 23 September 2009 at 12:13pm
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i think i found the cause of the overheating problem i had. the PCV valve was not inserted properly (at least i THINK its the pcv valve, the one on the front side valve cover coming up to the intake tube? can anyone confirm or deny what this is?) and now the car still seems to be idling to fast and heating up too quickly im going to replace the thermostat (temp recomendations for an overheating engine?) and check timing and it sounds like there may be a vaccum leak still because there is a hissing sound coming from the engine ALSO is there a heat sheild between the front exhaust manifold and firewall? if there is can anyone run out to your car quick and snap a pic of it for me? cause im not to sure if one was neglected to be put on during the engine swap THANKS GUYS! ------------- 
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Replies:
Posted By: Capt Fiero
Date Posted: 23 September 2009 at 2:16pm
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THe tube that goes from the valve cover to the intake tube is your breather line. The PCV is on the other valve cover and has a metal PCV valve in it. If you have a hiss, then yes you have a vacuum leak. This will cause high idle, overheating, glowing exhaust and all sorts of problems, a car with a severe enough vacuum leak to cause overheating, should not be driven, as it can quickly kill a piston due to lean out. I would try to book some time with Dr.Fiero or Blair. I don't know what there rates are right now, but either of them have the skills to help you.
It would honestly be best for you if you could find the leak yourself and fix it, you would learn a lot and be more comfortable with the car. The 1st major place to look is the EGR pipe. There is no easy way to do this, the Dr. and many others like to take propane and wave it around and listen for idle change but I don't think that is an option for you. So take a small knife and make the cleanest cut you can in the EGR pipe foil. Make it clean so you can re-use the wrap later. You are looking for a break in that metal pipe. Also fire up the car and feel around see if the leak noise changes. Yours is an 85, so my personal opinion is to get an EGR delete chip made up and remove the entire system. However once you have found the leak, replace what needs replacing and go from there. ------------- Capt Fiero 88 Fiero GT 5spd V6 Eight Fifty Seven GT V8 5spd. |