Fuel Injector change for FE?

[pana]

Sounds fun. I think any multiple hole injector will be better than the single pintle style version. Let us know how it turns out.

[beatr911]

Correction, they are EV6 style not EV14 style which means they are the same height as the EV1 (pintle) type.

If anyone is interested they are Bosch #0280156161 or Ford 3S4Z9F593AA. New they are like $75-$101, rebuilt about half that. Most junkyards don't know the difference and charge next to nothing like all the other injectors from everything else. These are PEZV versions of the car and available in California and "green states", optional in other states. Bright red in color.

A guy on the focaljet forum says that it is one of the only 12 hole injectors produced. When compared to the 4 holers in the Focus he swapped them into they caused a more consistent and smoother idle, apparently due to the better atomization. Power would be the same as peak flow is unchanged.

[BackroadBomber]

I put 4 hole injectors from a crown vic cop car on my 94 ford ranger 4-banger and saw atleast 2mpg average better... but who's to say my old ones with 150k on them were working perfectly so I 'm not sure if it was the style of the injectors or if one of my old ones were bad. Although, my CEL wasn't on before and now it comes on either under 1500 rpm in gear or over 4000 rpm in gear, but never while idling or between. either way it was a free ecomodding win since I didn't pay for the injectors.

[slowmover]

The ones on our 136k mile 2001 4.0L Cherokee XJ are original, and of the one-hole type (I keep thinking we're talking about a privy: one-hole, four-hole . .) and I have been reading on upgrading to the EV-6 type. Thanks for the above discussion as it hasn't been clear on the Jeep boards if a solid mpg gain was being seen. Maybe is different than confirmed.

Smoothness alone is worth it to me, and of necessary help on the slightly rough XJ idle to keep the diagnostic tree shorter when problem-solving. This looks like a no-brainer to order up some new type Bosch injectors.

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[firdale]

Please post results back if you do the swap on your jeep. The jeep board mods are predominatly aimed at power rather than FE. So, to see FE results would be great. Also, details details. Which injectors and how hard was it to swap them please. newbie 96 xj owner and determined to get 25 + mpg consistently from it.

[slowmover]

Originally Posted by firdale

Please post results back if you do the swap on your jeep. The jeep board mods are predominatly aimed at power rather than FE. So, to see FE results would be great. Also, details details. Which injectors and how hard was it to swap them please. newbie 96 xj owner and determined to get 25 + mpg consistently from it.

The decision has been made to trade the Jeep. Seems I'm the only one who really likes it. (Cheap to buy, cheap to run, cheap to fix . . what's not to like?)

The discussions I read were on NAXJA. Here is a link to one. I'd recommend new over rebuilt, and take care in spec'ng the correct ones for your model year.

Good luck.

.

[hat_man]

Hey beatr911...How did the swap work out for you? I have a '97 Ranger with probably the same 2.3l in it. Were the "red" ones you mentioned be a direct swap with the connectors or did you need to find/make adapters? Is there any difference/advantage to using the ones from California (because of the stricter emmisions rules I assume) or would any other 2005 Focus have the same style?

BackroadBomber...How about your swap. Do you still have them in there and do you still see the improvement? How about the CEL? Was it related to the injectors or something else.

I currently have 200k+ miles on the stock injectors and have thought about swapping them for something with a few more holes for better fuel atomization. It has to help some in the FE area but anything to smooth out the engine is a plus in my book.

Thanks for the advice.

[BackroadBomber]

I'm still running the orangish/yellowish cop car ones and I've had no problems. Ive had them in for 30k miles. My cel still comes on every now and then but my rangers completely beat. It has almost no compression, has 180k on the clock, it burns oil and knocks at startup so the cel could be anything. Not to mention I'm currently having problems with my dpfe sensor. It's a 94 so it will still pass new York inspection with the light on so I never really tried to fix it. I believe my scanner at work can read obd1 (or EEC-V, or whatever ford called it) so tomarrow I'll try to scan it and see what the code is.

On a side note, it's great to see someone else with a 3rd gen 4 banger ranger. I think they're very underestimated as an ecomoddable little pickup truck. I'm hoping to have mine at 35mpg before winter. Make sure you look for my experiment in the next month or so when I convert it so all 8 spark plugs fire on the ignition stroke.

[beatr911]

Well I couldn't find the red injectors but it looks like they would need an adapter for the electrical connection anyway. The red ones flow more than the stockers so they may not work in our Lima motors. Could be a great swap for the MZR/Duratec motors in the later rangers though.

I did find some gray injectors from I think a 2000 Contour with the 4 cyl Zetek. They are a 4 hole injector that pretty much match the flow rate 14# I think of the stockers. The electrical connection is the same.

So I got them home, removed the seals and little filter screen. Only a little crud came out. To clean the injectors I put a clear vinyl tube on the spray side and secured with a small hose clamp. Filled the tube with seafoam and clamped a shrader valve cut from an old bicycle innertube on the other end. Pressurized it to ~40lbs and applied 12 volts. A little more crud came out. Then I attached the tube to the supply side of the injector and repeated. The spray pattern was not good. I don't know if the test was poor or they are shot. Too cheap to pay $100 to have them professionally cleaned and checked.

I don't drive the truck much anymore and it looks like I'll be selling it to move anyway so I haven't been motivated to chase down new screens, seals and gaskets for the swap. You may try the Zetek injectors, it may be better than the orange mustang injectors as the flow rates match more closely. Impedance, dimensions and connectors should be the same also, you get the benefit of the 4 hole atomization.

As our heads have only one intake valve and the 4 hole injector spray patterns usually are for two intake valve heads, I don't know if there will be much gain due to fuel being aimed directly to the intake port walls. Then again it may still be an improvement over the old ones.

[ERTW]

Accel aftermarket 4 hole injectors claim 150 um droplet size. While the denso 12 holers claim 50 um. Anything under 70 um is considered fog. I can't say whether denso will give much fe improvement. At 5x the cost it seems like a poor return. Maybe gm figured that was the best compromise for fe and emissions. Def won't see any gains above 3500 rpm.

The parameter in the ecu you want is 'target afr'. Best lean torque is around 16.1:1. And also worst emissions. Upload the original bin file before gettin e-tested. You can do 18:1, and With a strong ignition system, 24:1 is possible.

Fuel injector offset IS a big deal if you increase injector size or change cams. Letting the ecu find the afr is ghetto