Engine/Transmission (1998.5 - 2002) Cleaning the fuel system

[SAndreasen]

What Is a good product to clean the fuel system with /?

 

[Bob4x4]

CRC fuel therapy has given me good results.It is also repackaged for mopar and has been recommended by the team at STAR for warranty repair.Back in the 90's I was using a chemical from germany that worked miracles-proven with an opacity meter.It made a 1st gen go from 20% down to 6%

 

[KATOOM]

What Is a good product to clean the fuel system with /?

What are you trying to clean? And why?

 

[Tractorat]

Ive always heard that if you use a fuel additive such as stanodyne, you dont need to use a fuel system cleaner (?)

 

[SAndreasen]

What are you trying to clean? And why?

I like things nice and clean , I think i might have some sludge in the tank from my gas in the fuel tank stunt I used some engine oil to dilute the gas and I think it sludged things up

 

[Bob4x4]

You might want to drop the tank and manualy clean it rather than pumping it trough the system

 

[SAndreasen]

You might want to drop the tank and manualy clean it rather than pumping it trough the system

Kinda wondering about that to

 

[SAndreasen]

Ive always heard that if you use a fuel additive such as stanodyne, you dont need to use a fuel system cleaner (?)

If you run it regularly and use good clean fuel you should be fine

 

[KATOOM]

Why I was asking is because as long as you dont have fuel contamination, there is no reason to use any kind of fuel "cleaner" in a diesel. Diesel fuel systems dont work that way and are not subject to the same pitfalls of gasoline deposits.

And in saying that, its best not to use such chemicals in the fuel since they tend to lessen the lubricity of the diesel. If whatever the chemical is can strip the system of debris then you can only imagine what its doing to the delicate lubricated fuel components.

If you feel there's an abundance of stuff in the tank or the fuel supply contaminated your tank, then its best to simply drop the tank and dump everything out and clean the tank itself. You dont want to try and send more crap and abrasive chemicals through the system for sake of convenience.

Also, if you see excessive large debris in the fuel filter then there's only two ways for that stuff to make its way into the fuel lines. 1) The fuel module basket pre-screen is damaged allowing such debris in, or 2) you installed a drawstraw or sump which offers no pre-filter.

 

[SAndreasen]

Well I was just looking through my records and it has Been a year since the last fuel filter change the only reason I am on this idea is because my fuel psi has been dropping to five at wot so I either have a weakining ddrp or I got junk plugging the pickup or the fuel filter is plugged

 

[NIsaacs]

Well I was just looking through my records and it has Been a year since the last fuel filter change the only reason I am on this idea is because my fuel psi has been dropping to five at wot so I either have a weakining ddrp or I got junk plugging the pickup or the fuel filter is plugged

I wonder if winter mix fuel plays a part in less fuel pressure? I am seeing a drop also, so I changed fuel filters but it didn't help.

When I went to the Edge Juice I changed my stock lift pump for a DDRP, that lasted about half a summer, then switched to the Rapter pump. It has been fine until this winter. At idle it still has 15-16 psi but a WOT it drops to 6-8. I too was wondering if my tank screen is restricted by algae or something. I used some super duper Power Service Algae/Slime eater but I didn't notice any difference probably a waste of money...

Nick

 

[Bob4x4]

I do not have much faith in the ddrp-to many premature failures

 

[KATOOM]

Time between filter changes shouldnt matter nearly as much as miles driven or hours used. Unlike gasoline which phase separates and leaves deposits, diesel fuel should be fine sitting unless it has water in it whereby algae can grow or corrosion can attack certain metals.

As for the pressure drop, well yes your overall psi may fluctuate a small amount due to the changing viscosity of the fuel due to ambient temperatures. But all in all we're talking a couple psi at most. You "may" experience a larger pressure variance too if you still have stock fuel lines and banjo fittings.

The biggest contributor to pressure dropping is blockage. Again, the only way for debris in the fuel to make its way up the fuel line is if either the module screen is damaged or you're running a drawstraw/sump. So if you see a lot of crap in the fuel filter housing then.....

And also, I believe there's a pre-screen on the DDRP as well which can collect debris before it makes its way through the pump. Depending on how cold it is outside, those screen materials can also collect globules due to gelling. Thus the reason why the OEM filter housing has a fuel heater.

 

[SAndreasen]

Wonder where the screen on the pump is this pump has always ran 16 at idle and 8 at 3200 rpm but lately it has dropped to 5 and my alarm goes off and that's at only about 2200 rpm

 

[KATOOM]

I believe there's a pre-screen within the inlet of the pump. You can call FASS and find out if your model pump via serial number even came with the pre-screen. Well.....that said, I've heard some fairly negative feedback lately about FASS's lacking customer service so I cant promise how well they'll treat your inquiry.

 

[SAndreasen]

Well I emailed blue chip and says there is a screen on the inlet for the early ddrp which I'm pretty sure mine is because I haven't seen an inline filter so maybe next weekend when she gets out of the body shop I'll take it apart and see if it's dirty , If not guess I'll be looking at An new pump .