Plenum & IH Pull

[32valvZ]

Took my last drive yesterday ahead of some bad weather today. Figured Id finally break down and pull the plenum and injector housings to send off to Pete for porting. Everything went ok except a couple of broken hard vacuum lines.... AND I found the map sensor rubber hose ends are pretty well cashed out. Not sure if I can just use a rubber line for that or not... In the mean time I pulled the coils and starter (replaced in 2016 by p.o.) for some valley cleaning. Also pulled the alternator and I think Im going to replace it with one of Jerrys units. Also going to send my FPR out to Phil for a rebuild while its all apart.

Any general suggestions are welcome

Just a shot of before and after cleaning..

[32valvZ]

Had another thought.... the injectors were replaced in 2016. Do I need to replace the o rings again?

[Jagdpanzer]

If not damaged, clean them up and use again.


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[billschroeder5842]

Originally Posted by 32valvZ

Had another thought.... the injectors were replaced in 2016. Do I need to replace the o rings again?

You are probably OK, but if it were me, I'd put new O rings. My OCD would not let me re use them as they are cheap and easy; everything is apart any way.

[Ccmano]

Originally Posted by 32valvZ

Had another thought.... the injectors were replaced in 2016. Do I need to replace the o rings again?

No! Unless you damage them. As long as they’re soft there is no issue.
H

[32valvZ]

Originally Posted by Ccmano

No! Unless you damage them. As long as they’re soft there is no issue.
H

Yea, they feel soft and there was almost no dirt or soot on the tips of the injectors. Thanks Hans!

[32valvZ]

Somethin' else just came to mind... will I need any changes to the prom due to the porting that Pete is doing?

[Ccmano]

Originally Posted by 32valvZ

Somethin' else just came to mind... will I need any changes to the prom due to the porting that Pete is doing?

The stock eprom runs rich to begin with. So it’s not absolutely necessary. However. If you want to max the power gain a Haibeck chip tune for those mods is great. Better yet a custom tune will extract the maximum out of the mods.
H

[A26B]

Originally Posted by 32valvZ

Had another thought.... the injectors were replaced in 2016. Do I need to replace the o rings again?

As stated in other answers, just make sure none of them are cut, lube with motor oil & reuse.

However, new injector sets do not come with the o-rings for the lower seal on the primary injectors, used on 90~92 models. There are 8 o-rings and they are located in a recess groove in the injector housing. Who knows whether these were replaced when new injectors were installed. See it here https://www.jerrysgaskets.com/lower-...llation-guide/

I imagine we probably provide most of these o-rings, which makes them easier to identify. Buna-N is black & Viton is brown. If you see a black o-ring inside the primary injector hole, in the Injector Housing, it is most likely Buna-N. We recommend replacement of the Buna-N o-rings with Viton o-rings for use with ethanol blended gasoline. The PN is 10067600-V. Here's the link https://www.jerrysgaskets.com/seal-s...n-90-92-7-5d8/

The remaining o-ring seals in the engine fuel system are in the Fuel Feed & Return Block and on the fuel pipes between the Fuel Rails & Regulator. For one set of Viton o-rings, use PN 14104675-9V, https://www.jerrysgaskets.com/seal-s...n-90-95-7-5d8/

[32valvZ]

Originally Posted by Ccmano

The stock eprom runs rich to begin with. So it’s not absolutely necessary. However. If you want to max the power gain a Haibeck chip tune for those mods is great. Better yet a custom tune will extract the maximum out of the mods.
H

Prom isnt stock exactly... its already been re calibrated for headers and exhaust by Mark... so will I need to send it back to him again?