Fuel injector labor cost?
Race Director
Joined: Aug 2000
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I thought OEM is the Multec stuff? If so, I wouldn't pay you $1 to clean them. I send them straight to the garbage can. They are old and need cleaning but because of what they are, they aren't worth the cost. If you talk to Jon at FIC, he might be able to send you a rebuilt set and you send him your old ones to be rebuilt. I doubt he takes Multec ones.
Team Owner
Joined: Jul 2004
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From: Hartford WI
not sure when GM started using multec's, but in 85 they were first generation bosch, or as some might say bosch1's. I'm still running my originals in my 85 - had them cleaned once. as far as jon taking multec, I'm thinking he bought a core set from my steel blue 90. there may be a market for OEM stuff - ???
Instructor
Joined: Feb 2014
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From: Lakeland FL
http://www.acdelcotechconnect.com/pd...sb_05D-105.pdf says if you have pre 94 Multecs, you can't get them cleaned per GM. Some say 85, some say 89 is when it first reared it's ugly head.
Team Owner
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From: Hartford WI
Instructor
Joined: Feb 2014
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From: Lakeland FL
Race Director
Joined: Aug 2000
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- I'm was thinking multec's raised their ugly head sometime in 86. I would be curious to know what type of injectors were used on "iron head" 86 vs their aluminum head counterparts, or whether multecs first appeared at the start of 1986 production - ???
Last edited by Joe C; Dec 23, 2014 at 06:12 AM.
Instructor
Joined: Feb 2014
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From: Lakeland FL
Originally Posted by ghoastrider1
If I can find the injectors( somewhere in a dark spot in my garage) I pulled out of my (L) 86 this summer, perhaps I can help answer that.
I was originally trained by GM as a tech in the late 80's and for some reason 87 stands out in my mind. May have been the first full year they used them. (I could be totally wrong also. Lots of partying back in those days and a lot of beers in the years after.
) One things for sure, they were proud of them. For the time they worked good and did what they were supposed to do.
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Thread Starter
Safety Car
Joined: Oct 2007
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From: Pennsylvania
When you installed the Bosch III's, were they a direct fit? Did you notice any improvements? I do know for sure that my 1985 C4 still has the Bosch I original fuel injectors in it now. Even after all these years, and 45,000 miles, they don't leak (yet) and operate perfectly. I want to change them just for preventative maintenance.
Team Owner
Joined: Jul 2004
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From: Hartford WI
Sure, you can see it doesn't leak from outside but I wouldn't reuse the O-rings once I removed them. You don't reuse your condoms or your buddy's used condoms, do you? But without pressure, how can you tell if it leaks or not unless you remove them?
IF they are Bosch injectors where the fuel doesn't flow thru the windings, I'd be fine with sending them out for cleaning and testing.
Instructor
Joined: Feb 2014
Posts: 139
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From: Lakeland FL
When you installed the Bosch III's, were they a direct fit? Did you notice any improvements? I do know for sure that my 1985 C4 still has the Bosch I original fuel injectors in it now. Even after all these years, and 45,000 miles, they don't leak (yet) and operate perfectly. I want to change them just for preventative maintenance.
I got them from Fuel Injector Connection (great person to deal with BTW). They are a little shorter than the originals but FIC provides another o-ring on each injector to take up the space. So yes, they are pretty much just a drop in replacement. Just tell them they are for a 85 L98 and they should come ready to put in. Mine did.
Here is a video explaining the extra o-ring:
Last edited by Mark8801; Dec 23, 2014 at 11:20 AM.
Race Director
Joined: Aug 2000
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When you installed the Bosch III's, were they a direct fit? Did you notice any improvements? I do know for sure that my 1985 C4 still has the Bosch I original fuel injectors in it now. Even after all these years, and 45,000 miles, they don't leak (yet) and operate perfectly. I want to change them just for preventative maintenance.
Team Owner
Joined: Jul 2004
Posts: 28,327
Likes: 3,242
From: Hartford WI
How do you clean it then? Every time I send my injectors out, they have different before and after values. The random tests I do when I can sneak into a place with a bench verifies the results.
Thread Starter
Safety Car
Joined: Oct 2007
Posts: 4,425
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From: Pennsylvania
The original injectors are almost 30 years old! How long do you feel "O"rings last? I can prevent fuel leakage, poor performance, stalling, fuel smell in the garage and most of all, an engine fire! 
They are way past their life expectancy and should be replaced before any of those things happen. I always perform "preventative maintenance" to avoid problems I could have prevented. True, there are parts that you don't really don't have to worry much about, but fuel injectors don't fit in that group in my opinion.
Team Owner
Joined: Jul 2004
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From: Hartford WI
When it comes to fuel injectors, the deterioration creeps up slowly and you won't notice it. Total failure, yes. Nozzles getting clogged up? No. Exactly why I clean them every 3 years. Because I get the report and see that after a couple years, crud gathers and alters spray part2and volume.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
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From: WV
I'm coming in on this thread a little late but I just wanted to mention one thing...When I got my 89 back in 2007 the car ran fine..One of the first things I did was add a can of fuel injector cleaner to the tank to clean out the injectors and the fuel system...I hadn't used half the tank of gas when I started to get some real bad missing at idle and at speed...When I came on this site and asked about the problem and told how the only thing I had done was put some injector cleaner in my tank, the answer I got from more then a few guys on here was that the injector cleaner had caused my Multec injectors to finally fail..They said the combination of fuel with ethanol, and injector cleaner, had dealt the final blow to my injectors...Since then I have seen many reports of the same thing happening to other people. .If you still have functioning Multec injectors , you may not want to use injector cleaner or your injectors could experience a very quick death...
...WW
...WW
Last edited by WW7; Dec 25, 2014 at 09:24 PM.
Team Owner
Joined: Jul 2004
Posts: 28,327
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From: Hartford WI
IIRC, it is because the insulation for the coil is cooled by fuel. I will never put the cleaning crap in any of my cars. Only way I will clean them is sending it out to someone with a flow bench.
Racer
Joined: Jun 2011
Posts: 283
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Is that year car a lot harder to swap out the fuel injectors than my 1996 coupe auto? I see some replies that said that it's about a 2-3 hour job. I'm a bit of a novice under the hood but I just installed some Bosch III's and it was pretty straight forward. Took me less than and hour to do. Why does will it take so much longer on the earlier years?
Instructor
Joined: Feb 2014
Posts: 139
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From: Lakeland FL
Is that year car a lot harder to swap out the fuel injectors than my 1996 coupe auto? I see some replies that said that it's about a 2-3 hour job. I'm a bit of a novice under the hood but I just installed some Bosch III's and it was pretty straight forward. Took me less than and hour to do. Why does will it take so much longer on the earlier years?
Race Director
Joined: Aug 2000
Posts: 11,470
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What am I going to prevent? The original injectors are almost 30 years old! How long do you feel "O"rings last? I can prevent fuel leakage, poor performance, stalling, fuel smell in the garage and most of all, an engine fire! They are way past their life expectancy and should be replaced before any of those things happen. I always perform "preventative maintenance" to avoid problems I could have prevented. True, there are parts that you don't really don't have to worry much about, but fuel injectors don't fit in that group in my opinion.
The original injectors are almost 30 years old! How long do you feel "O"rings last? I can prevent fuel leakage, poor performance, stalling, fuel smell in the garage and most of all, an engine fire! They are way past their life expectancy and should be replaced before any of those things happen. I always perform "preventative maintenance" to avoid problems I could have prevented. True, there are parts that you don't really don't have to worry much about, but fuel injectors don't fit in that group in my opinion.