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-   -   Horrible Fuel Economy (http://www.ramforumz.com/showthread.php?t=66492)

shadow22t 11-16-2010 11:19 PM

Horrible Fuel Economy
 
Hi all, i just bought a '89 Power Ram 100 with the tbi injected 318. It has the 727 tranny (36RH), NP241 Transfer case, full tow package, and the 114L gas tank. I just filled it a couple days ago and have driven about 260kms and have gone through 3/4 of a tank... Is this normal? I've checked the computer for codes and all it comes up with is 34 and 37. I'm not worried about 34 as i dont have cruise control, but i'm not sure what "Part throttle lock/unlock solenoid driver circuit" supposed to mean. Does it have to do with the torque converter lockup feature?

If this is normal, is there anything i can do to improve on it? I've driven it like the bed has been full of eggs since i filled it and i've heard of guys with the 318 and 90L tank getting between 500 and 600kms a tank...

Thanks!

GPSHSLAX 11-16-2010 11:49 PM

I'm sure someone whom knows better will chime in, but to my knowledge the power rams alway came with really tall gears. That will get you torque, but obviously is a drain on the tank.

That said, that does sound awfully low.

shadow22t 11-17-2010 12:33 AM

Oh ya, sorry i forgot to say that it has 3.21:1 Gearing too... according to the build sheet anyway. It's got the Chrysler 9.25" rear end and the Dana 44 front.

Thanks!

shadow22t 11-17-2010 01:28 AM

Oh... Just thought of something... Would it be possible that the cat is broken up/clogged? Is there an easy way to tell without ripping apart the exhaust?

GTyankee 11-17-2010 02:07 AM

slide under it & give the CAT a good rap on the side, does it sound like something is loose?

shadow22t 11-19-2010 02:18 AM

I tried banging on the cat, and i can't hear anything banging around... The only other thing that i can think of is maybe the injectors are a little gummed up and aren't giving a good spray? the truck hasnt been used a whole lot by the previous owners... it only has 110,000 kms on it... and it runs and drives really nice and fires right up

85PowerRamCustom 11-24-2010 05:35 AM

First gen Power Rams are pretty crappy on gas milage. I have an 85 250 with the 318 and stock two barrle carb and it gets about 8-10 mpg. The other thing is, if you have a 727, you dont have an overdrive, which means alot of towing power, but you suffer in gas usage. There's a slight power difference between your and mine, and mine has more weight, but mine sits about 250 miles before i fuel up on a quarter tank. It's just the pakage on the truck.


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