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> Cairo's Six - 3.6 in and running great!
ClayPerrine
post Jul 28 2024, 09:57 AM
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QUOTE(Cairo94507 @ Jul 28 2024, 07:24 AM) *

@rick 918-S I don't think it is low fuel pressure. When we first turned the key to power the systems, I had maybe 2 gallons of gas in the tank. We could hear the fuel pump pumping and it quickly was pouring gas back into the tank via the return line- sounded like a garden hose pouring water. But still, it is a good idea to throw a fuel pressure gauge in line to see... you never know. (IMG:style_emoticons/default/beerchug.gif)

@frankieshooz Thanks a bunch, let's hope it comes out as nice and we had planned. Once you get your car back from PMB we have to meet up at one of the gatherings. I would love to see your car. (IMG:style_emoticons/default/beerchug.gif)

@ClayPerrine - Those injectors look nice and would not break the bank either. I see they are presently out of stock. I have saved that page and will check to see when they are available. Even if we service mine, new injectors might be nice. (IMG:style_emoticons/default/beerchug.gif)


That's not the only place you can get them. Search around for the best price and availability.
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Cairo94507
post Jul 29 2024, 05:49 PM
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I just ordered the vacuum canister for the resonance flap. I did not have one....what the heck? My understanding is that comes into play at higher RPM's. (IMG:style_emoticons/default/confused24.gif)
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Steve
post Jul 29 2024, 08:21 PM
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QUOTE(Cairo94507 @ Jul 29 2024, 04:49 PM) *

I just ordered the vacuum canister for the resonance flap. I did not have one....what the heck? My understanding is that comes into play at higher RPM's. (IMG:style_emoticons/default/confused24.gif)

I left mine connected, but SMC and Paragon list it as part of the air injection. https://www.paragon-products.com/Vacuum-Res....110.140.03.htm So I am curious if it’s needed.
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ClayPerrine
post Jul 30 2024, 05:42 AM
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QUOTE(Cairo94507 @ Jul 29 2024, 06:49 PM) *

I just ordered the vacuum canister for the resonance flap. I did not have one....what the heck? My understanding is that comes into play at higher RPM's. (IMG:style_emoticons/default/confused24.gif)


There is a check valve and a vacuum canister in the line to the resonance flap. It is needed to keep the resonance flap open at full throttle. The manifold vacuum goes to zero at full throttle, and the resonance flap would close when it is needed the most. The canister provides enough vacuum reserve to keep it open. The check valve keeps it from dumping to the intake plenum that is at zero vacuum.
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Cairo94507
post Jul 30 2024, 07:11 AM
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Ohhhh... now I have to find a check valve. (IMG:style_emoticons/default/beerchug.gif)

Greg was able to take the injectors to the shop to get them serviced. I can't wait to get back out there so we can install them and see if that helped. (IMG:style_emoticons/default/confused24.gif)
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technicalninja
post Jul 30 2024, 08:35 AM
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Look to the AC world if Porsche is excessive on price.

Most of the dash systems from 20 years back had vacuum controls.

The check valves and vacuum canisters are sources of problems.

Need MORE volume in the canister?

VW water pumpers had what looked like a bunch of frog's eggs clipped to the hood.

Those are the best canisters of all...
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technicalninja
post Jul 30 2024, 08:36 AM
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I've got a couple of brand new MOPAR valves.

I'd ship one for free if it would help...
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Steve
post Jul 30 2024, 10:37 AM
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QUOTE(Cairo94507 @ Jul 30 2024, 06:11 AM) *

Ohhhh... now I have to find a check valve. (IMG:style_emoticons/default/beerchug.gif)

Greg was able to take the injectors to the shop to get them serviced. I can't wait to get back out there so we can install them and see if that helped. (IMG:style_emoticons/default/confused24.gif)

(IMG:style_emoticons/default/thisthreadisworthlesswithoutpics.gif)
Curious what valve you are referring to? This one? https://www.pelicanparts.com/More_Info/9556...amp;SVSVSI=0643
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eric9144
post Jul 30 2024, 01:57 PM
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(IMG:style_emoticons/default/piratenanner.gif) so close (IMG:style_emoticons/default/driving.gif)
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Cairo94507
post Jul 30 2024, 03:13 PM
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OK, the injector shop said the injectors were fine. So the hunt continues for why it is running rich and rough at low RPM. (IMG:style_emoticons/default/beerchug.gif)
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roundtwo
post Jul 30 2024, 10:23 PM
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Great project and progress Michael. I’ve been watching from the sidelines and learning along from you and the pit crew (IMG:style_emoticons/default/clap56.gif)
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ClayPerrine
post Jul 31 2024, 05:11 AM
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QUOTE(Cairo94507 @ Jul 30 2024, 04:13 PM) *

OK, the injector shop said the injectors were fine. So the hunt continues for why it is running rich and rough at low RPM. (IMG:style_emoticons/default/beerchug.gif)


Did you replace the O-rings under the intakes? Vacuum leaks will cause rough running.

Also, check to make sure the distributor is installed correctly. The injection is sequential, and if the distributor is installed wrong, it will run rough.
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Cairo94507
post Jul 31 2024, 06:08 AM
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@roundtwo - Thanks- I appreciate that. I look forward to seeing your car again.

@ClayPerrine - We did not replace the O-rings under the intake. We believe the distributor dropped right in the way it came out.... I will talk to Greg about that.

Thank you guys. (IMG:style_emoticons/default/beerchug.gif)
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Steve
post Jul 31 2024, 06:30 AM
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QUOTE(Cairo94507 @ Jul 31 2024, 05:08 AM) *

@roundtwo - Thanks- I appreciate that. I look forward to seeing your car again.

@ClayPerrine - We did not replace the O-rings under the intake. We believe the distributor dropped right in the way it came out.... I will talk to Greg about that.

Thank you guys. (IMG:style_emoticons/default/beerchug.gif)

The pulley should be on TDC (red mark) and both distributors should point to the line. Easy to see with the caps off. Could it also be the ICV? Is it also hunting at idle?
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Cairo94507
post Jul 31 2024, 06:36 AM
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@Steve - Thanks for the info Steve. As we continue to work this issue, we will be checking all that stuff. I appreciate your thoughts on this. (IMG:style_emoticons/default/beerchug.gif)
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technicalninja
post Jul 31 2024, 08:24 PM
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Mailed check valve today.

Incoming!
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ClayPerrine
post Jul 31 2024, 08:42 PM
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I was talking with Betty about this at dinner. And I thought of something else to check.

Make sure both coils are firing. The engine will run on one ignition, but it will do so badly. The pistons are large enough to need both coils to run smooth.

Put a timing light on each coil wire and make sure they are both firing.

Mine wasn't firing on both cylinders initially. I had a bad igniter.

Hope that helps!
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mb911
post Aug 1 2024, 04:24 AM
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QUOTE(ClayPerrine @ Jul 31 2024, 06:42 PM) *

I was talking with Betty about this at dinner. And I thought of something else to check.

Make sure both coils are firing. The engine will run on one ignition, but it will do so badly. The pistons are large enough to need both coils to run smooth.

Put a timing light on each coil wire and make sure they are both firing.

Mine wasn't firing on both cylinders initially. I had a bad igniter.

Hope that helps!

(IMG:style_emoticons/default/agree.gif)

Had a 964 that had a bad coil and it ran terrible. Unplugged the one coil and it ran better. Bought a new replacement for the bad one and all was good
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Cairo94507
post Aug 1 2024, 06:08 AM
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@ClayPerrine @MB911 = Excellent tip. I am. headed to Greg's this morning with the list of things to check. We shall see. (IMG:style_emoticons/default/beerchug.gif)
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930cabman
post Aug 1 2024, 10:29 AM
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QUOTE(Cairo94507 @ Aug 1 2024, 06:08 AM) *

@ClayPerrine @MB911 = Excellent tip. I am. headed to Greg's this morning with the list of things to check. We shall see. (IMG:style_emoticons/default/beerchug.gif)


Hopefully "the list" is getting smaller (IMG:style_emoticons/default/aktion035.gif)
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