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**Raylo** · 08-13-2008, 04:24 AM

It looks to me like the FPR is probably leaking. Not so sure about the nut kit but that is almost irrelevant as you need to replace it anyway when you do the FPR. Just handling those old plastic parts will stress them so they can't be trusted.

Another test you can do is with the plenum off turn the key on to pressurize the system to look for leaks. You should also do this after putting in the new parts before reinstalling the plenum. This will not check the individual plastic lines to each poppet injector as those lines only get pressurizd when the central injector fires so visual check will have to suffice. Those tubes come only on a whole new CPI, I believe.

Not sure what to tell you about vacuum. If all is connected it is proably OK. A vac gage check would help put that to bed.

Be very careful with all that brittle plastic!

08-13-2008, 04:24 AM	#8 (permalink)
Raylo TSF Enthusiast Join Date: Feb 2006 Location: Maryland, USA Posts: 521 OS: XP Desktop, Vista HP Notebook, XP Notebook	Re: 94 chevy s10 4.3 v6 problems It looks to me like the FPR is probably leaking. Not so sure about the nut kit but that is almost irrelevant as you need to replace it anyway when you do the FPR. Just handling those old plastic parts will stress them so they can't be trusted. Another test you can do is with the plenum off turn the key on to pressurize the system to look for leaks. You should also do this after putting in the new parts before reinstalling the plenum. This will not check the individual plastic lines to each poppet injector as those lines only get pressurizd when the central injector fires so visual check will have to suffice. Those tubes come only on a whole new CPI, I believe. Not sure what to tell you about vacuum. If all is connected it is proably OK. A vac gage check would help put that to bed. Be very careful with all that brittle plastic!