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Mitsumark · 08-11-2013

Thanks Dynomite..Really appreciate the hospitality.Fortunetly for me it seems the original owner spruced up the engine bay quite nice already.Ok gents..Since my last post,I've verified the old fashion way that I have atleast 1 weak coil.I used the old removing the wire method as I don't have a spark plug tester on hand.I'm getting very strong arching sound to ground on 6 cylinders.The other 2 sound very weak with spark noise coming and going..The coils are definitely in order.I feel it in my gut that there's cheapies in there.The car probably came in on trade with driveability issues and the dealer sent it out to a private garage where they put in new coils(per the receipt).Now onto the secondaries..In your honest opinions,do you guys recommend replacing the faulty vac pump and retaining the secondary function?Or is failure imminent being the car is an old lady.Im not sure if it matters but I forgot to mention before..Pumping air into the hose via the passenger side of the plenum,there are no leaks.it held vacuum for 3 hrs rock solid before I removed the gauge.I also have absolutely no trouble codes through this whole ordeal.Besides my faulty pump,does it sound like my secondary system is fully operational?

08-11-2013	#10
Mitsumark Join Date: Aug 2013 Location: NJ Posts: 117	Re: New ZR1 owner Thanks Dynomite..Really appreciate the hospitality.Fortunetly for me it seems the original owner spruced up the engine bay quite nice already.Ok gents..Since my last post,I've verified the old fashion way that I have atleast 1 weak coil.I used the old removing the wire method as I don't have a spark plug tester on hand.I'm getting very strong arching sound to ground on 6 cylinders.The other 2 sound very weak with spark noise coming and going..The coils are definitely in order.I feel it in my gut that there's cheapies in there.The car probably came in on trade with driveability issues and the dealer sent it out to a private garage where they put in new coils(per the receipt).Now onto the secondaries..In your honest opinions,do you guys recommend replacing the faulty vac pump and retaining the secondary function?Or is failure imminent being the car is an old lady.Im not sure if it matters but I forgot to mention before..Pumping air into the hose via the passenger side of the plenum,there are no leaks.it held vacuum for 3 hrs rock solid before I removed the gauge.I also have absolutely no trouble codes through this whole ordeal.Besides my faulty pump,does it sound like my secondary system is fully operational?