Injector service anyone done this?!

[montessgtp]

I just mailed 6 injectors out for cleaning to this web page http://www.witchhunter.com/injectorserv1.htm

Blueprinting balence and cleanin is costing me 82$?
Hopefully this makes a diffrence.

Anyone heard or uses this company before?

[bszopi]

Never heard of that specific company, but I had mine done at Marren Motorsports. Looks like basically the same thing. I had mine matched though (as well as blueprinted and balanced, cleaned, etc) so it ran ~$125. But it was well worth it and much cheaper than new injectors!!

[Lyle's GTP]

What are the benefits of this?

Lyle

[bszopi]

There are several. First off, your injectors get cleaned and flushed. They are then taken apart (I assume) to make sure all the internals are working properly, and then put back together per spec. In my case, each injector was then balanced with all of the other injectors to within ~2% off each other. This ensures that all cylinders are getting the same amount of fuel squirted into them, thus providing balanced flow and power. Here is the copy of what they sent back to me:



Hard to imagine that I had that done over 2 years ago!

[Switch]

What are the benefits of this?

Lyle

About 9 out of 10 of the injector sets that I service (with some miles on them), at least one injector flows at least 10% less than the others. Since the engines oxygen sensor averages the air/fuel of all the cylinders, that means that those with the poor flowing injectors are running lean and the others are running a bit rich.
It's not uncommon to have some flow 30% less than the others, that can cause a dangerous lean condition.
I always recommend doing them during a rebuild, had a customer burn a hole in a piston on a fresh engine due to a bad injector.
Just cheap insurance.

Gordon
WitchHunter Performance

https://www.witchhunter.com

[bszopi]

Nice... that's just sweet that the owner of the shop as a topic of the thread replies. Its nice to get actual shop people in here every now and again. Now I feel bad for mentioning Marren...

But since you are here, maybe you could do us a favor!? We always get asked the stock flow rates of various injectors for these cars. Is there anyway you could provide us with that info? It would be greatly appreciated!!

[Switch]

Nice... that's just sweet that the owner of the shop as a topic of the thread replies. Its nice to get actual shop people in here every now and again. Now I feel bad for mentioning Marren...

But since you are here, maybe you could do us a favor!? We always get asked the stock flow rates of various injectors for these cars. Is there anyway you could provide us with that info? It would be greatly appreciated!!

Not a problem, Marren's a good shop. I used to use RC Engineering before I started my own biz. Some places are getting too expensive though.
I saw some hits on my site coming from here so I popped in. I don't have a V6, got a vette...does that count?
I'll do what I can about the injector info, the injector manufacturers don't always give out info on the OEM injectors.

Gordon
WitchHunter Performance

[bszopi]

Well, if we need to send you the injectors we would like tested, I'm sure we could scrounge up at least one of each kind.

[montessgtp]

Well maybe he can use mine since i just sent mine out yesterday! .. After i called him.

[dykz34]

Brad is talking about all 60* injectors I believe. I know that there are tons of variation in them. If you look at the base of the injector, there are two colored rings. I think that the different colors signify something. From what I've heard, there are few (or many) different variations in the coloring of those rings.

[bszopi]

Yeah, I was talking about all the different injectors. I know we probably have a dozen or so thread on the forum asking what the stock flow rates of the 3100 injectors, or the 3400 injectors, or the DOHC injectors. It'd be nice to have a page that lists what the actual, tested values are.

[SappySE107]

I have a new 94 DOHC injector here I can have tested. I would hope brand new isnt dirty/clogged/bad spray pattern

[95gtp]

I did this cleaning process and I had great results. One injector was stuck open pumping fuel into the cylinder all the time. I sent them all in to get cleaned and tuned, they fixed the bad one and havent had any problems since. Doing this will save tons of cash by not buying new ones. I used "the injector perfector" for service. They were fast to, not alot of lag time.

[Lyle's GTP]

I'm sold. Is there anyone in Canada that does this type of work?

Lyle

[Switch]

While on the subject of injectors.....

I would like to pass some information along to the forum members.
The types of injectors that your cars normally use are very prone to sticking. This is due deposits that accumulate on them and the large sealing surface area. These deposits dry out and "glue" them shut. Some times they may break loose in a short time, but sometimes not. If they do break loose they may leak.
So if you remove your injectors for more than a day. I recommend that you promptly put them in small plastic bags and even shoot some WD40 in them if planning long term storage. Doing this will help prevent them for sticking and keep them from corroding due to moisture.

Just thought I'd pass this on, since I just spent a couple of hours getting some of these "unstuck".

Gordon
WitchHunter Performance

https://www.witchhunter.com