Fuel injector orings and flow test
 

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Are these even any good? And which way do the orings need to be? Like the one in the middle or on the right side with a smaller pintle cap?

What are you trying to do? The primary on the right is missing the pintle cap, and the one in the middle is missing the bottom oring and has the wrong pintle cap. The secondary on the left looks fine.

they give no units of measurement, so who the hell knows. and yeah, whoever put them back together just tossed random parts onto the primaries.

I usually use Marren. They give flow numbers and supply the correct orings.

They weren't sure how they went back together. They sent them like the one in the middle. I pulled the pintle cap off the right one and put the oring there. So I need to find the correct pintle caps, any leads?

i find it hard to trust a shop that throws your parts in the trash and forgets how to reassemble them before sending them back.

KG parts has the caps and kits, they just don't list the caps for sale individually on injector rehab.

In their defense, I sent them without caps and orings cause I had to destroy them in order to get them out. I will check out injector rehab, thanks!

Bosch Denso Pintle Cap

That the one I need for the primaries?

nope, that is for the 89-91 high impedence injectors.

Mazda Toyota Nippondenso Pintle Cap

?

nope, that is for low impedence 86-88, i checked already and said they dont sell them separate. you will have to call.

i use RC engineering. theyre on the west coast but when i get my injectors serviced, the o rings were always replaced. they changed a cap on a used injector i had as well. the chick at the front desk was great too, she knew the injectors were FD primary before i said a word. i immediately proposed, my wife would have objected had she said yes...

Oh jeez, I completely missed that :blush: my bad.
I will call later today, hopefully they can sell me two!

send them off to rc to have them cleaned, evaluated, serviced

They said those would work with modification, what are they talking about?

"For primary it will show not to remove as there is no replacement, but 2-103 can be modified to work. Would suggest buying more than you need to allow for mistakes modifying."

they likely cut down the high impedence 7.8mm caps so that the o-rings do not fit over it, but instead in the gap between the cap and body like the secondaries. there just won't be a step any longer.

if the pintle caps you have with your injectors fit snug, same principle.

:icon_tup: They'll give you a before and after test results you can understand. And maybe best of all... know how to put them back together.

Thanks for the help man. One last question, would I just be able to do this? Slide the oring over the longer pintle cap? Once it gets put in the rail and the bolts on it should snug it up I think?
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that o-ring is too fat for the rail it seems

These are the orings I got from atkins

This is what I did, think this is adequate?


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looks like that should work, likely what most shops do for these injectors.

Yay I did a thing!

Thanks for all the help. I emailed the place I sent these to, to try and figure out what the rates mean in terms of cc or lb/hr. Hopefully the response I get back is good. ProFlow Tech in Florida is where I sent them....

'We would need to do a static test with the injector fully open, at a fuel psi you give us.. Without a specified psi, and having the injector fully open (not pulsing like we usually do) there is no way to know.'

Sound legit? Or should I send them off to witchhunter and count my losses.

so they admit they didn't do an actual flow test on turbo injectors? well, that's kinda important.