Join Date: Feb 2011
Location: Boston Massachusetts
Spica newbie question
I’ve got several writeups on going thru the Spica system on a new-to-me 1974 GTV.
My motivation is incorrect cold start behavior and slight popping on decel. Other than this car drives nicely.
I removed the air cleaner to have a good look.
First thing: I noticed there is no lever or lock nut on the barometric compensator. Could this be correct for a 1974 USA car?
Second I didn’t get any voltage at the FCS terminal when reving the motor and letting rpm come down. That’s likely the cause of the popping.
Third, the TA isnt moving as much as it should, hence the absence of elevated cold start rpm. Car hold idle fine when I start it from cold but it hasn’t been below about 60F yet.
Fourth: CSS actuated when I applied 12VDC, and the car does start easily/instantly as long as I crack the throttle just a tad before I crank it. I think it’s fine.
So, disappointingly, the Spica system has 2 of the 4 most common failures. I should have checked it pre-purchase ... but the car test-drove so nicely I did think I needed to
I havent yet extracted some of the internal oil to do a proper sniff test for gas. I hope it passes this test, but given the other issues I’m assuming the worst.
Last edited by bfeng; 09-18-2019 at 09:56 PM.