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Re: vacuum leaks Posted by Gene N [Email] ![]() ![]() ![]() In Reply to: vacuum leaks, Daniel, Sat, 12 May 2001 03:16:55 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Daniel, after you've done the visual inspection that Craig suggests and replaced those hoses, you may still have a leak. The biggest culprit is the blow off valve, also known as the hooter valve. Disconnect the vacuum line that runs down to the valve and suck on the end of the line. If you don't get any resistance then replace the hooter valve. If the valve is good, get a can of spray fuel injector cleaner and put the long red tube on the spray nozzle. Start the car and carefully spray the cleaner at suspect hoses and joints. When the cleaner hits a leaky spot, the idle speed will blip up momentarily.
This was the only way I was able to locate a leak in the intake runner tubes. The short length of rubber hose between the head and the rest of the intake manifold had deteriorated on the inside. The new ones were of much better construction (made in France, oddly enough).
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