Fuel injectors - Replace with new or service?

[Mab1957]

What is the current opinion of forum members on M30 fuel injectors, service them or replace with new?  If service is there a preferred service provider?

[Mike W.]

To me it depends. I'm not a fan of the -203 injectors that came on 535's thru mid 86 or so, they tended to get dirty and leak. I would look for different options before servicing them. The slightly later -714 don't seem to have the problem with getting dirty and leaking like the earlier ones, so I would tend to keep them. Depends on the price too. Keep in mind some of the supposed replacement ones are really designed for 4 valve heads and don't have the right spray pattern for a 2 valve head.

[Mab1957]

Thank you.  This is an '87 engine, is there a distinguish mark/identification for the 714 injector I should look for?

[Mike W.]

The last 3 numbers on the side of the injector are -714. Might be something like 0 280 150 714. Or maybe not. Very small, but readable P/N molded on the side. Of course you're going to have to have them, or at least one, out to read it, there may be a color code, but if there is I don't remember it, just the part number.

[Aldo525]

The last 3 numbers on the side of the injector are -714. Might be something like 0 280 150 714. Or maybe not. Very small, but readable P/N molded on the side. Of course you're going to have to have them, or at least one, out to read it, there may be a color code, but if there is I don't remember it, just the part number.

 

 

 

 

You are right, for 87' M30B35 the injectors are Bosch 0 280 150 714. Yellow top color.


 

[Federico]

Back in 2017, I bought these replacement injectors under the 0280150714 p/n from AutohausAZ:

https://www.summitracing.com/parts/bch-0280150714

IIRC they are 4 pintle design, more misty and less of a jet compared to the originals, but they have been working great.
They seem to be listed still, but with the wrong photo:

https://www.autohausaz.com/pn/0280150714

[stuartinmn]

Is replacing them with 5.0 Mustang injectors still a thing?  I bought a set of them years ago and put them on the shelf as spares, but the originals still seem to be working up to spec.

[Chimi-Changa]

If you decide to send them in for service, they can let you know if any are in bad shape, and cant be used with good results.

I've used Marrin (injector.com) in Oxford CT, and also Hurst in Fitchburg, MA (hurstinjectorservice.com).
 

[Mab1957]

I see that number now, Mike W, and thanks everyone.  I will seek out opportunities for local service (DMV area), or contact Chimi Changa's recommended shops and see if they can determine how many are serviceable.

 
 

[tseohs]

My experience:

Finally figured out the dead cylinder issue. It was an injector, or technically 3 injectors. Took a while to get it sorted because I thought the injectors in the b35 were good having driven the donor car before the swap. So before focusing on the injectors, I ruled out everything including a leakdown test.

Cylinder 6 injector had a dead coil and 2 others leaked and were unrepairable. This caused a misfire on one and an overall rich running condition with fuel coming out the tailpipe due to the leakers. Luckily I had another set from the b34 so I was able to get 6 working injectors with perfect spray pattern and flow.

Regarding injectors, Cruzin Performance is not currently cleaning injectors. So I sent my injectors to HPI at https://hpinjectors.com/pages/hpi-injec ... g-services
They provided before, during, and after videos to show exactly what condition the injectors were in and proof of correct spray pattern and flow afterward. Of course they replace o-rings and caps and several of mine needed some other attention. I first sent them a set of 6 from the b34 which they were able to clean and get perfect. Unfortunately one was damaged in return shipping. They graciously offered to do the 2nd set from the b35 for free. That's when I found out 3 were bad. All reassembled and running like a champ.

[Mab1957]

I provided 12 injectors to RRT for service.  Unfortunately only 6 were found functional and their operation less than satisfactory and inconsistent.  So I used Federico's suggestion and ordered a kit of the replacement injectors from AutohausAZ.  FCP also shows a kit available https://www.fcpeuro.com/products/bmw-fu ... 80156372kt.

[MLastovo]

Hello,
I put a set of the following in my both the '87 & '88;
Bosch F4SE-A1B
0280155700
They were used in the mid-'90s 4.6/5.0l Fords. IIRC, the guy I got 'em from was taking them from brand new 5.0 Mustangs that were heading to Saleen for upgrades.

Any feedback on whether these were good alternates? A quick search of the past posts shows much chatter about them at the time so I am kinda curious to hear if there is a better option now.

Thx,
D.

[Blue Shadow]

Don’t know how easy it is to get cheap mustang takeoffs these days. I put a set in my 85 535 and it solved the warm start which was slow.  But I lost the instant cold start.  It is the same as the hot start now. They are 4 hole vs the single hole in the originals. 

The 7 needs injector service. I need to look into what’s needed for that motor. Maybe the ‘stang ones will work but I only have one or two pair, know I’m at least 2 short. 

[MLastovo]

Don’t know how easy it is to get cheap mustang takeoffs these days. I put a set in my 85 535 and it solved the warm start which was slow.  But I lost the instant cold start.  It is the same as the hot start now. They are 4 hole vs the single hole in the originals. 

The 7 needs injector service. I need to look into what’s needed for that motor. Maybe the ‘stang ones will work but I only have one or two pair, know I’m at least 2 short. 

Howdy,
One of the things I think I recall is that the Ford injectors had something like a 3-4% higher flow rate and that was desirable for a higher mileage M30 that probably had a few more vacuum leaks than when new/designed to. Places that leak are around the timing cover kinda places. Once again, IIRC...

I have 2 of the Ford injectors that I will/can part with if you need them. I do have a new project that I will be R&Ring the injectors but the engine and car has less than 100k on it so I don't really know if I am going with the Ford parts.

r/
D.

[Blue Shadow]

Thanks for the offer. I have to get busy and figure out what the 7 has, but I think it is different from the 5. Then find the injectors and move forward on this project. Been spending too much time on audio, but the home rig really sounds good to me these days. 

[gadget73]

Couple of different spray patterns and injector slopes on Ford injectors despite the same nominal flow rate, so just mind that they actually match the OE ones reasonably.  The 80s ones were a single pintle with a hollow cone spray pattern, the later ones are a 4 hole that is less conical and not hollow. F4 is a 1994 part number, 80s stuff starts with E. 

Ford ran 19# injectors in the 4.6 2 valve engines but at some point they changed from the EV1 style plug to the EV6.  Adapters can be had but if you want the old square connector you need EV1 type. There was a transition period with the skinny EV6 body that still had EV1 plugs. That was probably through around 2002. I have a set someplace, I believe they came out of a 5.0 Explorer. They lived in my Towncar until it got larger injectors. 
 

[Tiit]

I'm testing my injectors at home. Not as comprehensive as professional services, but it gets the job done. My basic setup allowed me to check if the injectors flow equally, flow patterns, leaks, fpr function and cold start injector. 
 


 

 

[gadget73]

What are you using to pulse the injectors, or are you just holding them full open? 

[AndrewG]

I am in the process of baselining my new to me 88' 535is and just pulled the injectors.  Sad, but unsurprised to learn that they are not OEM but rather bosch #0280155710 - originally intended for various 90's fords.  So instead of having them refreshed as I planned, I am looking for replacements.  The realoem BMW # is 13641706176 which translates to the Bosch #0280150714 that Mike W mentioned above.  But that '714 injector seems no longer available and numerous sites suggest Bosch #0280156372 (also known as Bosch 62417?) as a replacement.  Anyone have any experience with them?  Here they are listed by FCP

https://www.fcpeuro.com/products/bmw-fu ... 80156372kt

For anyone curious, here are the injectors ther car has been running on.

https://www.csperformancefuelinjectors. ... -9f593-aa/