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Fuel pressure tester...


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I am looking for a good tool to test the fuel pressure at the connection besides the fuel filter. I know the Porsche adaptor number is 9559 and the gauge is P378A . Is there something similar, less expensive, but of a good quality that I can found. Remember there is a valve under the cap besides the fuel filter and the adaptor got a plunger that depress this valves when installed. Thanks a lot for the info. J.P.

for info, only the hose Porsche part# 00072195590 is $148.75 ohmy.gif

I think the adaptor needed for the port has to be M12X1.5.

Edited by jpflip
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Contact Actron, they have two testers for fuel that retail for around $40, and ask if they have the correct adaptor for this application. If they do, that will probably be your cheapest out as everyone else is way over $100 for what you need. And don't even think about buying tools from Porsche, they are just plain nuts on pricing.......

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Contact Actron, they have two testers for fuel that retail for around $40, and ask if they have the correct adaptor for this application. If they do, that will probably be your cheapest out as everyone else is way over $100 for what you need. And don't even think about buying tools from Porsche, they are just plain nuts on pricing.......

Thanks JFP good suggestion.

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  • 3 weeks later...

Contact Actron, they have two testers for fuel that retail for around $40, and ask if they have the correct adaptor for this application. If they do, that will probably be your cheapest out as everyone else is way over $100 for what you need. And don't even think about buying tools from Porsche, they are just plain nuts on pricing.......

Thanks again JFP. I finally got a proper tool to test the fuel pressure. This is good to eliminate a bad fuel pump or a rupture U pipe in the tank located on the pump canister. The Actron fuel pressure gauge is good Fuel pressure gauge # CP7838 but all the adaptors in the kit are useless for a Porsche. You have to get at the same time for less than $4.00 the right angle adaptor # 01800-000-1299. Just connect the adaptor and the gauge to the port beside the fuel filter and if you got 43.5 to 58 psi it is a good news ;-) (repair manual page 544). Of course you have to activate the fuel pump relay with Durametric to check the fuel pressure without starting the car. Or remove relay #13 from relay carrier #1 above the fuse panel and jump terminal 30 and 87.

post-29683-0-99901100-1300483955_thumb.j

post-29683-0-57356700-1300483966_thumb.j

Edited by jpflip
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Contact Actron, they have two testers for fuel that retail for around $40, and ask if they have the correct adaptor for this application. If they do, that will probably be your cheapest out as everyone else is way over $100 for what you need. And don't even think about buying tools from Porsche, they are just plain nuts on pricing.......

Thanks again JFP. I finally got a proper tool to test the fuel pressure. This is good to eliminate a bad fuel pump or a rupture U pipe in the tank located on the pump canister. The Actron fuel pressure gauge is good Fuel pressure gauge # CP7838 but all the adaptors in the kit are useless for a Porsche. You have to get at the same time for less than $4.00 the right angle adaptor # 01800-000-1299. Just connect the adaptor and the gauge to the port beside the fuel filter and if you got 43.5 to 58 psi it is a good news ;-) (repair manual page 544). Of course you have to activate the fuel pump relay with Durametric to check the fuel pressure without starting the car. Or remove relay #13 from relay carrier #1 above the fuse panel and jump terminal 30 and 87.

jpflip:

The terminals that you have circled look like number 38 and 87 in the diagram.

Thanks for posting the tool and procedure.

Regards, Maurice.

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It is the German way to make the difference between the number O and the letter O in electric diagrams, terminal 38 does not exist on such relay, according DIN standards.

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It is the German way to make the difference between the number O and the letter O in electric diagrams, terminal 38 does not exist on such relay, according DIN standards.

RFM:

Thanks for the clarification!

Regards, Maurice.beer.gif

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Contact Actron, they have two testers for fuel that retail for around $40, and ask if they have the correct adaptor for this application. If they do, that will probably be your cheapest out as everyone else is way over $100 for what you need. And don't even think about buying tools from Porsche, they are just plain nuts on pricing.......

Thanks again JFP. I finally got a proper tool to test the fuel pressure. This is good to eliminate a bad fuel pump or a rupture U pipe in the tank located on the pump canister. The Actron fuel pressure gauge is good Fuel pressure gauge # CP7838 but all the adaptors in the kit are useless for a Porsche. You have to get at the same time for less than $4.00 the right angle adaptor # 01800-000-1299. Just connect the adaptor and the gauge to the port beside the fuel filter and if you got 43.5 to 58 psi it is a good news ;-) (repair manual page 544). Of course you have to activate the fuel pump relay with Durametric to check the fuel pressure without starting the car. Or remove relay #13 from relay carrier #1 above the fuse panel and jump terminal 30 and 87.

jpflip:

The terminals that you have circled look like number 38 and 87 in the diagram.

Thanks for posting the tool and procedure.

A blow up picture of the wiring diagram will show you a little difference between 0 and 8. It is important especially when you are ordering relays....

Regards, Maurice.

post-29683-0-15020000-1300536832_thumb.j

post-29683-0-39215100-1300536988_thumb.j

Edited by jpflip
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