Best way to test fuel pressure on 3.1/3.4

[Sunaj]

what’s the easiest way to check fuel pressure on a 3.1 or 3.4 engine? the power steering line is in the way. One of my service manuals calls for an adapter piece that costs 300 bucks and a fuel pressure tester that costs around 900. No thanks.

I do have a fuel pressure tester that I got from AutoZone that has worked on other cars. it seems like I just need the valve fitting adapter for it and also a way to fit my guage in there

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[college man]

Can you bend the line a little to get access to the port?

[Andrew Harris]

If you only have a cheap fuel pressure kit that doesn’t have all the adapters in it then you have no choice but to find a way to connect to the shrader valve. Is the vehicle a no start and you want to test fuel pressure? If so spray some carb cleaner into the intake and see if it hits. might be easier to narrow down your problem.

[Sunaj]

Looks like i’ll have to bend it a bit. ridiculous really..

[Sunaj]

edit……………..

[Sunaj]

[quote=”ArmedsouthernEr” post=175631]If you only have a cheap fuel pressure kit that doesn’t have all the adapters in it then you have no choice but to find a way to connect to the shrader valve. Is the vehicle a no start and you want to test fuel pressure? If so spray some carb cleaner into the intake and see if it hits. might be easier to narrow down your problem.[/quote]

Just need to test pressure to help diagnose an intermittent drive-ability issue. I think my fuel pressure regulator may have failed, but i want to test this the right way instead of going out on a whim and just replacing a part.

[James]

I have the 3.1L in the monte carlo. It takes 3 bolts to remove power steering pump with lines still attached. You’ll have to take belt off but leave lines attached. You may need to pull the one bolt and move that belt diagram cover plate as well. Just move it an inch or two to get fitting on rail. You should only run car for short time to check fuel pressure with water pump not turning. If anyone else finds this as a bad idea, please post.

[Sunaj]

[quote=”jjohnson1″ post=175742]I have the 3.1L in the monte carlo. It takes 3 bolts to remove power steering pump with lines still attached. You’ll have to take belt off but leave lines attached. You may need to pull the one bolt and move that belt diagram cover plate as well. Just move it an inch or two to get fitting on rail. You should only run car for short time to check fuel pressure with water pump not turning. If anyone else finds this as a bad idea, please post.[/quote]

Im seriously not going to remove a serpentine belt and a power steering pump just to check fuel pressure, come on GM. If I cant bend the line for whatever reason I will have to. So frustrating.

[James]

Yeah its ridiculous. I am sure with the right adapter it would not needed that. That being said, I changed the lower intake on mine and that was crap. I had to pull almost everything off the top of and around the intake to get to that pos.

Do you have any adapters to check at the fuel line where it comes in near the throttle body with the quick connects. I believe one is incoming and the other is return.

[James]

Another thought is those snap into a bracket near the back of the alternator, if you can unsnap the hard line out of that you may be able to wiggle it just enough to get on fuel rail. Sorry not much help here.

[Sunaj]

Thank goodness was simple enough to just bend the power steering line.

[college man]

[quote=”Sunaj” post=175811]Thank goodness was simple enough to just bend the power steering line.[/quote]

😉

[Andrew Harris]

Just curious what your results were?

[Author]

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