Pull and service my injectors or not?
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- Posts: 267
- Joined: Aug 10, 2010 5:20 PM
- Location: The outback of the southwest
Pull and service my injectors or not?
My 85 535i ran great when I asked it a year ago. I parked it to get it ready for a respray and air dam and to replace my fuel pumps. I have upgraded to the single in tank pump. Still have yet to find a front dam (Alpina style or M5) for a reasonable price shipped. But I have a new OEM fuel filter, and fuel pressure regulator to install. Question is should I pull and service the injectors or just leave then until I see if they are ok?
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- Joined: Feb 12, 2006 12:00 PM
- Location: SE PA
Re: Pull and service my injectors or not?
If you have problems with the way they work get em done.
Original injectors will allow the car to be started with the first bump of the starter with the key when cold. This is assuming the ICV is in fully correct operating condition.
Original injectors will allow the car to start with very little cranking when hot.
My original injectors would accomplish the first but the warm crank got longer and longer and I swapped em for some like new 5.0 'Stang injectors when that was a thing.
Now the cold start and hot start take the same fairly short crank to get the motor running. The cold bump of the key start is gone. I miss it but I don't have to sit there cranking when I jump into the ride already warmed up.
Original injectors will allow the car to be started with the first bump of the starter with the key when cold. This is assuming the ICV is in fully correct operating condition.
Original injectors will allow the car to start with very little cranking when hot.
My original injectors would accomplish the first but the warm crank got longer and longer and I swapped em for some like new 5.0 'Stang injectors when that was a thing.
Now the cold start and hot start take the same fairly short crank to get the motor running. The cold bump of the key start is gone. I miss it but I don't have to sit there cranking when I jump into the ride already warmed up.
Re: Pull and service my injectors or not?
Leave em be.
Re: Pull and service my injectors or not?
With -203 injectors, 85/86 IIRC, I had lots of problems with them getting dirty and leaking. I think I might have had the exact wrong use pattern to allow that, but I did. With -714 injectors I no longer had problems. YMMV. I'd still fire it up and see what happens, then make a decision.
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- Posts: 267
- Joined: Aug 10, 2010 5:20 PM
- Location: The outback of the southwest
Re: Pull and service my injectors or not?
Cool, I'll put the fuel pump and pressure regulator and filter back in and see how it runs and drives. Thanks!
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- Posts: 3160
- Joined: Feb 12, 2006 12:00 PM
- Location: Colorado High Plains / formerly The Lone Star State
Re: Pull and service my injectors or not?
I mean, we should all have two sets: one in the car and one ready to be installed. I do mine every 50-60K. Honestly, unless they've got corrosion (which should be obvious as soon as you start the car and drive it) run some Lucas Fuel Injector Cleaner (the stuff MM likes) through the car with your first tank of new fuel. Evaluate. I agree, the 714 injectors are better.