Join Date: Oct 2018
Location: Cranbrook, BC, Canada
Hi there, even with only a 1000 miles, with an unknown car I would still change the rear filter and open it up. The filter is cheap as dirt at napa, only takes a few minutes to change, the longest time spent jacking the car up, not too messy if you pinch off the inlet hose with something. I think 74 would still have the old style front filter housing, if that's the case then the rear filter is doing all the filtering for the whole system as the rear napa filter is 10 micron and the front element is 38 micron.... The next gen front filter is 4 micron.
Tuning around a bad TA is a slippery slope, better to change the TA, get a sure start or build a dummy TA and leave it in.
R&R of the microswitch is DIY if you consider a R&R of the Spica pump DIY. Is there power to the microswitch? When doing the test did you rev it up enough and snap the throttle off?
Setting up Spica isn't hard but it really is a front to back process that needs to be followed from front to back and not piece meal.
From memory some T number spica pump don't have a leaver on the top, what is your currently installed T number of pump?
Carson, 4 Alfa's, 9 Cars, 4 Motorcycles