Injector Experiece
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Injector Experiece
I replaced the injectors on my 91 IDI NA. Used Delphi BB codes, for no other reason than that's what my local shop recommended. And I had also heard good things on here, but w/o a in depth engine build and/or an added turbo, i cant imagine you could tell much if any difference. Also bought the DIPACO return line kit, that leaked horribly... Most likely bc of my hurried installation (which I think is the root of most problems) either way I have ordered the Delphi #7135-264 kit w a set of viton #111 o-rings.
The reason I decided on the Delphi is bc amazon is awfully convenient and I like uniformity. The o-rings were also available and they seem to be the better choice, from others experiences on here.
I'll post results
Thanks for all the help FTE!!
The reason I decided on the Delphi is bc amazon is awfully convenient and I like uniformity. The o-rings were also available and they seem to be the better choice, from others experiences on here.
I'll post results
Thanks for all the help FTE!!
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Hey sorry for the lack of effort. Ok well the milage is up from 10, but so far only at 12.5. The truck feels much better, starts easier, and does get better milage just not what I hoped. I'm trying to get my pennies together to take it to my local shop for a pump rebuild and then the timing set. I'm hoping that's the weak link. After seeing the shape the injectors were in, the pump could surely us a freshening.
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From: REARDAN WA
When I bought my 93 7.3. It had 250000 on it. All original never touched other than oil and filters. I was getting 16. I advance the timing 1/16 and instantly had more response and was getting 20 mpg. The pump is timed by gears and over time they get wore out or like I say Broke in. This causes the timing to retard some but not more than 1/16 of a turn. You could try that if you know how to advance the IP.
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Well, here's another reason I wanted to have the pump rebuilt/swapped; I broke the timing advance cam on the throttle shaft of the IP. No paying attention to what I was doing. I got a new one and installed it by feel and sound but it can't be right. So until that's corrected on a bench, I can't really be sure of much else.
Postmaster
Joined: Dec 2004
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From: Maple Valley, WA
No, just adjust it to where it feels the best. These pumps arent rocket science, bench calibration is to maintain a uniform setting for all engines, but nothing beats real world driveability tuning. Big differences can be made just by tuning the different aspects of the pump.
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I had read on here a lot of guys do the injector refresh with the ip rebuild. So that you adjust the timing and then the injection system is all equal and a full potential. I know that's more an idealistic way of doing home mechanic work. But it does make sence to me, I just don't have the idealistic $600 haha.
And the still to low mpg's makes me wonder if that would help that. I could do the 1/16 timing turn, but I don't have timing gauges and don't want to make it worse.
And the still to low mpg's makes me wonder if that would help that. I could do the 1/16 timing turn, but I don't have timing gauges and don't want to make it worse.
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And on the timing advance cam, when setting it the only place it felt really rough was on the upper end. So I just opened the throttle, adjust cam until it was smooth at 2,200-2,500 rpm. The only problem is it's still got a shake at mid rpms.
It's not a dead cylinder shake neseccaraly, but it is there. And now that I've got fresh injectors and nothing to compare it to, I'm not sure if it's power is weak or not. I will say I do feel like it's a touch on the under powered side.
It's not a dead cylinder shake neseccaraly, but it is there. And now that I've got fresh injectors and nothing to compare it to, I'm not sure if it's power is weak or not. I will say I do feel like it's a touch on the under powered side.
More Turbo
Joined: Nov 2010
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From: Cincinnati, OH
Just to make sure terminology, when you mean advancing the IP, it is more like 1/6 of an inch. Rotate the IP toward passenger side, with engine off. You should have a line, the popular amoutn is a dime width. Or about 1/16 inch. Certainly not 1/16 of a rotation, as that would be way too advanced.
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Well I never took it, I just ordered the piece ($20) from a company online and got some help on here and set it myself (several times). Not perfect but no shakes or misses, so good enough for now.
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