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Fuel pump tuning

Tech talk for GMH/Isuzu and Great Wall owners

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Posts: 16
Joined: Fri Dec 02, 2005 10:53 pm
Location: North Wales UK

Fuel pump tuning

Post by Dooda »

Has anyone ever tuned the fuel pump on an Isuzu 2.8? If so is there a thread that I can view on the subject? Cheers
You can lead a horse to water but a pencil must be lead.
DTS
Posts: 11
Joined: Wed Dec 14, 2005 1:53 pm
Location: Alice Springs, NT.

Post by DTS »

Hi there

If you are trying to check your injection timing you will need to go to a mechanic that knows how to check the pump timing with a micrometer in the rear of the pump. There is a specific way to do it.

If you are simply trying to get a bit more umff out of your donk there is a 12 mm nut with a screw in the centre of it at the rear of the injection pump near the cut off solenoid. if you crack off the nut and wind the screw in a touch it will richen your fuel mixture. I have done this on numerous Rodeos and it can make a difference.

If you are not mechanically confident don't touch it as it is easy to stuff your fuel mixtures up. If you are going to have a go make sure that you mark the screw in the centre before you go ahead and on ly wind in the screw a poofteenth at a time as a tiny bit can make a big difference.

P.S, this may effect your fuel economy and if you start blowing alot of black smoke you have gone to far.

Hope this helps, DTS.
Posts: 16
Joined: Fri Dec 02, 2005 10:53 pm
Location: North Wales UK

Post by Dooda »

G'day, thanks for that info. I have adjusted the starwheel and boost compensator but not the mixture screw yet. Exactly how much is a poofteenth? Is it more or less than an oojimiconk? Cheers
You can lead a horse to water but a pencil must be lead.
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