Quote:
Originally Posted by Discseven
86... are you referring to the dampener on the 4-5-6 rail? If so, to test for a tear, is that the check for fuel in the vacuum line connected to it?
Merk...I believe those caps are tight but will check them today. That switch has been capped for many years---when engine was running 18 city mpg.
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From my experience, a torn diaphragm in the fuel pressure regulator often leads to hot start issues—but definitely something worth checking. We've seen several of these regulators fail over the years.
I've bought parts from Adapt before—great folks to deal with—but I haven’t tested one of their regulators on a 3.2 yet.
As for the thermoswitch, those caps won’t cause a vacuum leak on their own since they don’t connect to the intake path. The switch simply opens or closes the passage between the two nipples based on throttle body temperature. It appears that you've disabled/removed that entire system already.
I picked up a pair of ignition coils from a 964 on eBay. Since 964s are twin-plug, the coils come in pairs. They use the same coil design as the 944 and 3.2 Carrera, though the 964 versions are typically from newer model years.