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1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

put my 366 spring in yesterday and im only running 28 pounds of boost now it was 32 pounds i turned fuel screw all the way, in any ideas... JOIN NOW TO REMOVE TRACER

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  #1  
Old 12-23-2009, 06:35 PM
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put my 366 spring in yesterday and im only running 28 pounds of boost now it was 32 pounds i turned fuel screw all the way, in any ideas

H Bomb's Sig:1993 1ton 5spd denny t pin, starwheel maxed, fuel screw maxed, 366 springed,
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Old 12-23-2009, 07:25 PM
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indexed the throttle wrong?

Alwaysworking's Sig:white-'91 350,4x4,getrag 5speed,SB3600DD, swapted in a 92 cummins do to head gasket failure,garrett 60/65/12 wg, p/s intercooler,3" tubes,M&H twin ram intake,366,fuel screw in M&H fuel pin(M2) and timeing spacer,afc spacer,,gauges,4inch exhaust,20mpgs M&H Inc traction bars

To order M&H Inc performance parts PM me or e-mail thru http://mandhinc.net/
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Old 12-23-2009, 07:46 PM
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Originally Posted by Alwaysworking View Post
indexed the throttle wrong?
Thats would be my guess, how is the idle?

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Old 12-23-2009, 08:01 PM
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i didnt look at notches when i tore it down, so when i put it back together it tried run away four times then i hit the right one, it idles good, i just took the high idle screw off yesterday so i figured that would give it a lil more but i dont know, i really miss those four pounds though,
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Old 12-23-2009, 09:12 PM
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Check the spring and corresponding levers from the fuel pin.Did you remove the fuel screw when you put it back together?
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Old 12-23-2009, 09:54 PM
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Mine lost a lil bit of smoke when I did the spring in it but I never looked into it all that much cuz the boost wa about the same and the truck would run better than it ever has.

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Old 12-25-2009, 11:58 PM
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yea i would have to go with the throttle index is off, i had more boost after i put my 3200 gov spring in.....

seandonato73's Sig:1990 Dodge W250, custom intercooler, 4" turbo back exhaust,air dogII 165, 3200rpm gov spring, injection pump maxed out, 80hp DDP injectors, upgraded intake housing and compressor wheel,auto meter pyro,boost, fuel pres,and oilpres gauges M&H fuel pin set M4 installed, advanced pump 3/16", ARP head studs, O-ringed, and ported 7mm head
new Purchase 94 12v engine for my 79 super cab project
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