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  #1  
Old 06-20-2020, 09:10 PM
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Thread/Fitting for Fuel Pressure Test Port?

Ok I give up. My fuel pressure tester and the TWO I bought on Amazon all fail to fit on my E53 M54 fuel pressure test port Schrader valve.

The one I have is far too large.

The first kit I bought came with so many brass fittings I stupidly assumed one would fit.

The second kit I bought supposedly fit "standard tire size" Schrader valves, which I was led to believe is what the M54 has, as well as most Ford's. But when I go to screw it on, it seems to be the right thread but it never stops turning. But I've got other things that do bottom out with the right thread so it's not the test port being stripped.

The fitting with that kit is very short. The first 2/3 of the brass is unthreaded and then it's got some threads at the top of the fitting. I'm wondering if that's the problem - too deep of a fitting?

I just ordered a CTA 3445 fuel pressure tester on Amazon. It's $50 instead of $30 which kinda sucks, but it's labeled BMW/Volvo, so I'll roll the dice on it. Unfortunately not here until Tuesday.

Will it work?? Or is there some magical dance BMW wants me to do to reveal a functional fuel tester to me??

Harbor Freight sells one that's pictured in an article online that talks about E53 fuel pressure testing. I can maybe get that one sooner than Tuesday but don't want to go through the effort to drive to HF if it's not going to be useful... Anyone used that one on our cars?
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  #2  
Old 06-20-2020, 09:27 PM
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No secret, standard size fitting AFAIK. Sounds like more of a quality problem with your kit. It's important that everything fits properly so that there are no leaks and that the schrader valve gets pushed open properly to get good readings, so any extra money spent here is a good investment.
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Old 06-20-2020, 09:31 PM
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Quote:
Originally Posted by 80stech View Post
No secret, standard size fitting AFAIK. Sounds like more of a quality problem with your kit. It's important that everything fits properly so that there are no leaks and that the schrader valve gets pushed open properly to get good readings, so any extra money spent here is a good investment.
Ok good to know! I'll wait patiently for the CTA kit on Tuesday.

I let the car sit for 30 minutes and pushed the valve in. Almost no pressure, just a dribble of fuel.

I'm guessing fuel pump check valve. Hoping it's not injectors. But before throwing parts at it I'd like to see what the fuel pressure looks like with engine running to see if maybe some of the issues I've experienced are a fuel supply issue.
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  #4  
Old 06-21-2020, 02:50 PM
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The CTA kit fits and works as designed
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2005 X5 4.8IS
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  #5  
Old 06-21-2020, 10:27 PM
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Quote:
Originally Posted by StephenVA View Post
The CTA kit fits and works as designed
Do you have a link to where you bought it?
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  #6  
Old 06-22-2020, 11:03 AM
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My error, I am using the OTC unit...https://www.tooltopia.com/otc-tools-5630.aspx
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2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green
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  #7  
Old 06-22-2020, 01:00 PM
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Originally Posted by StephenVA View Post
My error, I am using the OTC unit...https://www.tooltopia.com/otc-tools-5630.aspx
Thanks!
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  #8  
Old 11-10-2021, 07:35 PM
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Quote:
Originally Posted by Mike1261 View Post
. But when I go to screw it on, it seems to be the right thread but it never stops turning. But I've got other things that do bottom out with the right thread so it's not the test port being stripped.

The fitting with that kit is very short. The first 2/3 of the brass is unthreaded and then it's got some threads at the top of the fitting. I'm wondering if that's the problem - too deep of a fitting?

I pm'd you because I'm experiencing this exact issue with the loaner kit from local store

I am curious if you figured out whether it was your kit/adapter or the valve on your rail that was the problem
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