Dodge Cummins Diesel Forum banner
  • Hey everyone! Enter your ride HERE to be a part of this month's Ride of the Month Challenge!

1 - 4 of 4 Posts

·
Registered
Joined
·
77 Posts
Discussion Starter #1
Been haveing intermittant fuel pressure issues after trying 2 cycle oil(slow build up pressure at startup- 5 to 10 seconds to full pressure when its usually instantaneous) Changed filter seemed to settle down to normal.
Headed down the road to Santa Fe stopped after a couple of hours; on start up engine light stayed on and the fuel pressure started jumping back and forth from normal 8lbs to 0. On throttle dropped to 0 - on let up would recover; drove a little while thinking I'd head to Taos to get another filter; after a while pressure stayed up on throttle and droped to 0 on letup????

Stopped and to see what codes would come up: 1693 & 0237. Autozone computer says:1.Turbocharge control circut malfunction & PCM determined input voltage for boost pressure sensor A is too low for current engine opperating conditions.

So what does this have to do with my fuel pump pressure????Figured may bad electrical connection (some corrosion in the connection).

Cleaned off the pump electrical connections and disconnected batteries. After a couple of stop and starts the engine light stayes off and the pump pressure is more or less normal - maybe drops a little more than usual on throttle; but acceptable 6lbs.

Thinking its time for a good fuel pump to replace Dodges intank fix. But doesn't explain the codes which I'm still getting even though the engine warning light doesn't stay on.

Meanwhile engine runs smoothly without a hitch throughout???
 

·
Mopar1973Man.Com
Joined
·
26,259 Posts
Well let me say this first..."2 cycle oil didn't cause this problem." 2 cycle oil has now been test on all 3 name brand trucks (Dodge, Ford and Chevy) and never had any failures directly related from the 2 cycle oil yet to date. I've got 40K miles on my truck using solely 2 cycle oil and getting awesome MPG numbers now (check signature out). But be glad the 2 cycle oil was in the fuel because it just saved you VP44's life from being burnt up and distroyed by lack of fuel...

The intank pumps are junk just like the stock side of the engine pumps. You need to invest in a good solid fuel pump like a Raptor, AirDog, or FASS (Most expensive).

Here is my write up on AirDog 150 pumps...
AirDog Fuel Pump

MINIMUM FUEL PRESSURE is 10 PSI at WOT...
 

·
Registered
Joined
·
77 Posts
Discussion Starter #3
Well coincidences do happen. But I got a fresh tank and added the 2 cycle while filling and 10 minutes later at the next start up my fuel pressure guage showed a slow build up and ever since until I got a fresh tank with no 2 cy. and now seems normal. But I did clean the contacts.
Maybe the intank doesn't have the umph to push the denser fuel through the filter????
 

·
Mopar1973Man.Com
Joined
·
26,259 Posts
I know the intank pump is worthless... That why myself never went back under warranty to get a new fuel pump... I went on my own and took care of the problem properly. I did several Campaign pumps (4090046) and all them failed with in a years time... Now I've got a AirDog 150 and problems are gone for life...

My fuel pressure at idle and at WOT it only drops to 15.5 PSI...:w: (This is with 128:1 ratio shot of 2 cycle oil)
 
1 - 4 of 4 Posts
Top