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Old 07-16-2020, 03:12 PM
Kerry Chadderton Kerry Chadderton is offline
 
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Default Fuel Injector Cleaning Advice

I'm tuning up a '85 3.2 for my brother in law. It has major vacuum leaks at the intake gaskets. I was thinking, "Oh well I'll toss in a new set of injectors whilst I'm in there". After seeing the price per injector I lost consciousness for a moment....

I'm going to send them off for cleaning and testing. Do you guys recommend anyone in our area?
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Old 07-16-2020, 06:24 PM
mlytle mlytle is offline
 
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i use RCEngineering in california. great folks, one day turn around.
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Old 07-16-2020, 08:10 PM
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I believe Ivan Arzola (IMA Motorwerkes) has a machine and can do this. But he's i Chantilly, which is still not close to Easton. If I had to mail them off my first thought is the same as Marshall's.
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Old 07-16-2020, 09:24 PM
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Old 07-16-2020, 10:06 PM
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When I bought an '86 engine built by Peter Dawe (former Andial engine builder), he used Marron Engineering to rebuild the injectors.
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Old 07-17-2020, 06:41 AM
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Quote:
Originally Posted by Kerry Chadderton View Post
I'm tuning up a '85 3.2 for my brother in law. It has major vacuum leaks at the intake gaskets. I was thinking, "Oh well I'll toss in a new set of injectors whilst I'm in there". After seeing the price per injector I lost consciousness for a moment....

I'm going to send them off for cleaning and testing. Do you guys recommend anyone in our area?
I used these guys with excellent results but that was a few years ago.

https://www.witchhunter.com/

FYI - I put new injectors in the 79 SC last December before I sold it in March 2020. IMHO not worth the coin. Next time I will go for cleaning and testing.
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Old 07-17-2020, 07:12 AM
Kerry Chadderton Kerry Chadderton is offline
 
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Thanks for the input everyone. I just said "in our area" to support Porsche people in our bailiwick, if possible. I'm not in a rush.

Patrick, I agree 100%. I've replaced all injectors a few times over the years and the results have never matched my expectations. In fact I'd argue that many times old OEM injectors still outperform new aftermarket ones, regardless of make and model.
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Old 07-17-2020, 09:19 AM
av8bpilot av8bpilot is offline
 
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Just clean them yourself. It's very easy and there are a lot of YouTube videos showing how. If you want to go above and beyond, you can get a little sonic cleaner to clean the tips before and/or after. If they're working fine after a cleaning, there's no reason to rebuild them.
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Old 07-17-2020, 10:15 AM
mlytle mlytle is offline
 
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Quote:
Originally Posted by av8bpilot View Post
Just clean them yourself. It's very easy and there are a lot of YouTube videos showing how. If you want to go above and beyond, you can get a little sonic cleaner to clean the tips before and/or after. If they're working fine after a cleaning, there's no reason to rebuild them.
what's missing from the self-cleaning process is the accurate flow testing to determine if there is an internal issue, even after cleaning. you may have pretty injectors after doing them yourself, but you will not know if they are all working well, equally. i have self cleaned injectors for a daily driver, but the injectors in engines i care about go to shops that do it for a living.

ymmv...
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Old 07-17-2020, 10:27 AM
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Quote:
Originally Posted by mlytle View Post
what's missing from the self-cleaning process is the accurate flow testing to determine if there is an internal issue, even after cleaning. You may have pretty injectors after doing them yourself, but you will not know if they are all working well, equally. I have self cleaned injectors for a daily driver, but the injectors in engines i care about go to shops that do it for a living.

Ymmv...
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