Engine/Transmission (1994 - 1998) 12V Fuel pressure & transmission temp gauges

[cluckmaster]

12 valve guys- I'm looking at fuel pressure gauges, and was hoping to match my DiPricol Optix gauges, but they offer only a 30psi and 100 psi gauge. What do you all run? I thought a 40 or 60psi would be better.



Also, it seems that the high pressure lines they sell to go from the pump to isolator are all for 98 and up trucks. (checked Genos and DieselManor). Do the 12 valves not need that line?



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The transmission temp gauge is offered in full sweep w/ a stepper motor for about $100, or the regular range gauge for about $50. Is there a big advantage for the full sweer range w/ stepper motor?

 

[EKlem]

You are correct that a 40psi gauge would be better than a 30. I have a 30 from isspro and it is pegged under certain conditions.



Regarding how they are hooked up, I am assuming that you are talking about using a mechanical gauge with an isolator. The banjo bolt that you see listed for the '98 and up trucks is for the banjo on the fuel filter and it is a different size than the banjo bolt at the inlet to your injection pump. What I did and many others have done as well is to drill and tap the end of the banjo bolt that is on the supply side of the IP. Remember that because we have mechanical fuel pumps which are prone to spiking pressures so you need to include some form of snubber. I have a specially made snubber from isspro but many others have adjustable needle valves made from hardware store parts.



I got everything from diesel manor and was very pleased, both with the service and with the instructions that they included.

 

[cluckmaster]

So, I need to order the gauge w/ isolater, snubber w/ the piston for diesel fuel, and high pressure line? Not exactly sure how the fuel pressure gauge is plumbed. Drill out banjo bolt and install snubber. 1/8 in outlet of snubber is attached to 1/8 in fuel pressure hose, then fuel pressure hose goes to isolater (included in gauge kit). Then isolator goes to gauge inside cab. Is that correct? Thanks. -Josh

 

[DonTX]

Wow, I want to put a fuel pressure on my 97, but am still confused on all this, anybody got a photo or a link? It was SO EASY on my first gen, just buy the banjo bolt and screw it in. Snubbers, isolators etc, what the heck are they?

I have the three gage pillar, it is full, so I guess I got to ad one on the dash somewhere, or can I just put it on direct to the banjo bolt under the hood, I want it primarily for monitoring filter condition.

 

[cluckmaster]

The snubber is available from Dieselmanor.com under isspro gauge accessories. Isolator available under gauge accessories, but comes w/ fp gauge.



Isspro makes a 60 psi gauge. I really wanted to stick w/ the Optix line, but is 100 psi too high to be accurate?

 

[TEasley]

I would go with the 100# gauge. 20# to 40# is within the accuracy range of the gauge and gives you a good cushion.



Tom

 

[ttbird]

12 valve guys- I'm looking at fuel pressure gauges, and was hoping to match my DiPricol Optix gauges, but they offer only a 30psi and 100 psi gauge. What do you all run? I thought a 40 or 60psi would be better.



Also, it seems that the high pressure lines they sell to go from the pump to isolator are all for 98 and up trucks. (checked Genos and DieselManor). Do the 12 valves not need that line?



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Here's a detailed write up by Signal73 for a 12v fuel gauge set up. Used it to build mine. Just needed to extend hose into cab. Was worried about fuel in cab but buy good hose and route it well and everything seems good.

http://turbodieselregister.com/forums/showthread.php?t=157564&highlight=12v+fuel+gauge



Tom

 

[EKlem]

I found diesel manor to be very helpful over the phone. I essentially got the same thing as my roomate did for his 24V except that I didn't get the new banjo bolt and I did get a snubber.



The way that mine is plumbed is that I drilled out the back of the banjo bolt then screwed the snubber into that. I used the braided steel line(I think that this is the high pressure line that you are talking about) to go from the snubber to the isolator. Then there is a little black hose going from the isolator to the gauge.