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by **Tsbourne09** » Thu Sep 08, 2011 2:17 pm

Think i can turn my full power screw down without taking pump apart to get to it?

by **AHineman** » Thu Sep 08, 2011 2:21 pm

by **Tacoclaw** » Thu Sep 08, 2011 7:09 pm

It's just a flat-head screwdriver screw with a 13mm locknut around it, shouldn't be any problem at all. a 12pt. 13 should let you get onto it. I think I used to take my AFC reference line off to get to it easier.

The worst part is that you'll probably have to adjust your idle up. :yuck:

If you can't do it with the linkage ball setup, that means getting to that horrible idle screw.

by **Hansen01** » Thu Sep 08, 2011 7:52 pm

i think i used an L shaped screw driver when i adjusted my idle, i dont remember how i got the locknut off,probably with an extension and a swivel socketi also took the large banjo bolt(i think thats what it is, i dont remember) good luck :lol:

by **Begle1** » Thu Sep 15, 2011 6:55 pm

You don't have to adjust the idle up, you have to turn it down. You'll be getting more fuel at idle with the power screw turned in; it gives more fuel, that's how it gives more power.

There's an anti-tamper cap on the pumps stock. You have to mangle it off to get to the screw.

There's an anti-tamper collar welded on the screw itself that prevents it from being turned that far in. If you want to get as much as you can, you gotta thread the screw out to remove the collar, and you may need to chase the threads with a metric die afterwards.

It's good practice after turning in the screw, especially after removing the collar, to be ready to put a board over the turbo intake to shut the engine down if it runs away. I've had it happen to me four times now, I think.

Don't overtighten the locknut on the screw; you might break the screw. I had that happen to me once; I suspect it was because the I weakened the screw taking the anti-tamper collar off. A new screw won't have the collar on it and cost $20 back a few years ago.

by **Tacoclaw** » Fri Sep 16, 2011 2:09 pm

Tsbourne09 wrote:93 D250- pump maxed

Tsbourne09 wrote:Think i can turn my full power screw down without taking pump apart to get to it?

I assumed he meant turn the screw out, as in get less fuel, not turn the screw in.

Which one are you going for, Ts?

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Full powe screw adj.

Full powe screw adj.

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