1995 vortec v 1996+ vortec

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Oct 3, 2009 | 06:37 PM

#11

Biohazed

Senior Member

Joined: Mar 2009

Posts: 603

From: Killadelphia, PA

Personally I've owned a 1997 and a 95 and honestly have had alot less engine problems with the 95 than the 97 .. but that could be my own personal experience

Oct 3, 2009 | 11:22 PM

#12

bigdaddykane93

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i think its easier to periodically change out the CPI injector on a 95 CPI motor than it is to periodically replace the lower intake gaskets on the 96 and newer SCFI motors in my opinion...

Oct 4, 2009 | 08:00 AM

#13

swartlkk

Administrator

Joined: May 2005

Posts: 41,333

From: Waterloo, NY

Quote:

Originally Posted by bigdaddykane93

i think its easier to periodically change out the CPI injector on a 95 CPI motor than it is to periodically replace the lower intake gaskets on the 96 and newer SCFI motors in my opinion...

Why would you periodically change out the LIM gasket on the SCFI motor when you can do it once with the metal framed gasket and forget about it?

Oct 4, 2009 | 09:54 AM

#14

bigdaddykane93

Senior Member

Joined: Aug 2009

Posts: 578

Quote:

Originally Posted by swartlkk

Why would you periodically change out the LIM gasket on the SCFI motor when you can do it once with the metal framed gasket and forget about it?

becuase i have heard of a bunch of people stilling having to change them again even though they used metal framed gaskets.....

Oct 4, 2009 | 02:08 PM

#15

swartlkk

Administrator

Joined: May 2005

Posts: 41,333

From: Waterloo, NY

Then it was not done correctly the first time. As with any repair, if you do not do it right, it won't last. Can't blame that on the tools, materials, or the vehicle.

May 11, 2016 | 12:12 PM

#16

bgformula

New Member

Joined: May 2016

Posts: 4

From: Colorado Springs

I was reading you can put the MPFI on the 96 SCFI, I this correct?

I was reading you can put the MPFI on the 96 SCFI, I this correct?

Quote:

Originally Posted by swartlkk

Your 95 is a CPI (central port injection) motor. All CPI motors have a fairly bad FPR (fuel pressure regulator) design. The SCFI (sequential central fuel injection) motor is what is used on the 96 through mid-02 engines and after that it was changed to a true MPFI (multiport fuel injection) spider.

The CPI engine uses one single batch fired electronic fuel injector which feeds the six pressure actuated poppet nozzles spraying fuel into the intake runners. The SCFI engine uses six individual electronic injectors in a central injector pod. The electronic injectors feed poppet nozzles very similar to those used in the CPI engine at the intake runners. The MPFI spider redesign looks very similar to the SCFI spider, but the electronic injectors are moved down to the intake runners, replacing the somewhat problematic poppet nozzles.