Author Topic: A definitive fuel pressure test kit for V8s or the 6.9 ?  (Read 99 times)

secondslc

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Hi Guys,

This group is incredible, and I'm excited to be part of it. You guys helped me get a California 6.9 that was abandoned in a garage in Minneapolis for 20 years to lift up and be able to be driven around the block.

Its not a perfect car, but its relatively clean (I always say that with reservation..its a w116).

But my diagnostic skills have stalled, I actually need to diagnose the fueling issue it has (discussed in another thread).

Does anybody have a relatively specific kit or suggested kit I should purchase for fuel pressure testing? I'm not afraid of making an investment, but there are so many options out there, I really don't know where to start.

If anybody has a list of fittings and gauges, or a kit that worked for them for a MB V8, I'd be infinitely grateful for the guidance.

I hope to be able to drive it more than around the block this summer, and I think getting the fuel pressures right will be key.

Thanks so much!
Giuseppe
1979 6.9
1983 urQuattro
1991 200 20V Avant
1993 Corrado SLC
1996 SL600
2009 Super V8

daantjie

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Re: A definitive fuel pressure test kit for V8s or the 6.9 ?
« Reply #1 on: 21 June 2020, 02:57 PM »
Check out this one from Tim, a.k.a "TJ450"

https://www.youtube.com/watch?v=oFzS1AfyGIs

Also this vid from Tim, very good vid on how it should look:

https://www.youtube.com/watch?v=q5cal1qzw_4



Daniel
1977 450 SEL 6.9 - Astralsilber

raueda1

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Re: A definitive fuel pressure test kit for V8s or the 6.9 ?
« Reply #2 on: 21 June 2020, 03:12 PM »
Hi Guys,

This group is incredible, and I'm excited to be part of it. You guys helped me get a California 6.9 that was abandoned in a garage in Minneapolis for 20 years to lift up and be able to be driven around the block.

Its not a perfect car, but its relatively clean (I always say that with reservation..its a w116).

But my diagnostic skills have stalled, I actually need to diagnose the fueling issue it has (discussed in another thread).

Does anybody have a relatively specific kit or suggested kit I should purchase for fuel pressure testing? I'm not afraid of making an investment, but there are so many options out there, I really don't know where to start.

If anybody has a list of fittings and gauges, or a kit that worked for them for a MB V8, I'd be infinitely grateful for the guidance.

I hope to be able to drive it more than around the block this summer, and I think getting the fuel pressures right will be key.

Thanks so much!
Giuseppe
You're looking for something like this: https://www.amazon.com/BETOOLL-Injection-Pressure-Tester-Gauge/dp/B01L17TPT2/ref=psdc_15707421_t1_B06XKD6VL5
There are lots of similar kits.  The biggest difference that I can see is the number of adapters/fittings.  Err on the side of flexibility and get one with lots of adapters.  As Daniel says, this is essential for figuring out what's going on with your fuel injection. 
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

Mattr

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  • 6.9 in a 450SE
Re: A definitive fuel pressure test kit for V8s or the 6.9 ?
« Reply #3 on: 21 June 2020, 03:43 PM »
This one is supposed to be K-Jet specific. I bought it a year or two ago (and have yet to use). At this point, I'd probably sooner go with the toolkit listed above that's half the price.
https://www.amazon.com/gp/product/B0002SR5NU/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
1976 450SE 6.9 FrankenBenz (#2288?)
1977 450SEL 6.9 #2333

secondslc

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Re: A definitive fuel pressure test kit for V8s or the 6.9 ?
« Reply #4 on: 21 June 2020, 03:46 PM »
Thats the kit Tim said didn't have all of what was needed lol. But yeah, I'll go with the cheaper kit as it seems more complete
1979 6.9
1983 urQuattro
1991 200 20V Avant
1993 Corrado SLC
1996 SL600
2009 Super V8

Mattr

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  • 6.9 in a 450SE
Re: A definitive fuel pressure test kit for V8s or the 6.9 ?
« Reply #5 on: 21 June 2020, 04:32 PM »
Thats the kit Tim said didn't have all of what was needed lol. But yeah, I'll go with the cheaper kit as it seems more complete
ah, I was too lazy to watch the Youtube videos. Hm. Hopefully it isn't incomplete. I'll be rather pissed if it is.
1976 450SE 6.9 FrankenBenz (#2288?)
1977 450SEL 6.9 #2333