Turning Up Disel Pump(Fuel)

[cyberbeej]

can understand what you guys are saying about the bighorn but my trooper has a thumb throttle so idle isnt a problem.
i found the fuel screw and gonna measure the boost pressure and see what it measures, thought its ment to be 10psi standard or is the bighorn different? where is best to take boost gauge from?

[scruff123]

geeves wrote:they do Its under a cap. Increasing the fuel on that engine though also increases the idle speed

can anyone tell me were it is in these photoes? cant find any cap or screw??

P2242510.JPG
P2242511.JPG

[wbski007]

WOW I can't see any fuel adjustment screw on your pump but there should be one somewhere, how about it Geeves you see one anywhere?? That might be it on the upper left of the bottom photo, its under a yellowish tin cap. Your pump is way differant than mine.

[geeves]

everyone expects too much of me. A lot of things are from memory from what others have written and this is one of those. Ive never actually touched a pump.

[chrisfnq]

geeves we dont expect too much from you..
you are for isuzu what the stig is for top gear...lol
And i cant find an adjustment screw on my pump either...lol

[ecw23able]

If your pump is like mine the adjustment screw is too left out of camera shot of the bottom pic. Under a cover. Careful not to bend the cover pulling it off I ficked mine totally.

[cocholi]

you don't ser the fuel adjustment screw because your pump is electronically, adjustment screw is for mechanical pump

[geeves]

93 Mu is very likely only mechanical injection

[DieselElectric]

scruff123 wrote:geeves wrote:they do Its under a cap. Increasing the fuel on that engine though also increases the idle speed

can anyone tell me were it is in these photoes? cant find any cap or screw??

P2242510.JPG
P2242511.JPG

This type of injection pump uses an electronic governor (COVEC-F) and is controlled by a computer elsewhere in the vehcle ie. no simple external adjustment. To adjust fueling on this pump it SHOULD be done professionally however, it can be adjusted by loosening (NOT REMOVING!!!) the four screws on the top (governor) and tapping it forward or backward with a hammer and a punch. BEWARE: If you choose to attempt this adjustment and botch it your engine may not start or, it will start then idle high and take off on the slightest touch of the throttle.