tractor

9 hours ago, Onyx610 said:

Check fuel pressure too. These ones were also notorious for gear spin on the shaft of fuel pump. 

what pressure should it have thanks

engine runs fine but down on power  no leaks air to air or compressor hose went  from 35 to 33 psi turbo just those two codes  would like wiring diagram for buzzer

truck is 1998

talked to previous owner he unplugged buzzer it came  on with single lights power divider low air is this normal . now on all the time . it was plug i was talking about.  engine is a e7-400 ser 8r3453 truck model rb688s .code pid 1oo fmi 04  low  voltage detected at oil pressure sensor, sid 238 04 voltage below normal or shorted to ground would any of these derate horse power thanks bruce

the redish plug has 8 holes and seven connecter

no just a few plugs  one plug is redish

how many prongs on 2 or 4  buzzer  or plug thanks

model rb688s  1998

 shut  down light has no bulb in shut down light socket so maybe buzzer is not plugged in either

thanks how many wires in plug a lot of emty plugs there is not  alight in socket thanks

with

sorry i mean shut down buzzer alot of plug swith nothing in them

cannot find it how many wires on it

also code pid 100 fmi 04

 on a mack rb688s  with a e7-400 engine where is engine shut down buzzer 1998 code sid 238 fmi 04 thanks

air temp sensor  is off on ohms and computer getting new one the screws to adjust how tight truck turns are stuck any way to solve this thanks

cac not leaking air intake not leaking air compressor you talking about line feeds compressor thanks

a e7-400 lost power used to be 35 psi trubo now 32 what should we check still revs about the same butunder load lose one gear  that didnt have to shift before

solenond clicks hard pin moves orings are rough not broken sent for 4 new ones from mack

not bottom of solenoid straight under solenoid in casting put finger under casting hole goes up to solenoid thanks

the oil comes out hold  on casting under selen0nd not top now and no braded lines

jake is a model 690    part number 021433   mack number 757gb58b

under the jake casting selenond  above it oil comes out about as round as a pencil thanks

not leaning over engine thanks but barly working some times no jake

when they have power is that normal thanks