Fuel Injector replace - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Buick When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 10-10-2017, 06:27 AM   #21
Senior Member

True Car Nut
 
WilliamE's Avatar
 
Join Date: Jun 2011
Location: VA
Posts: 3,087
Thanked 417 Times in 375 Posts
WilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond repute
Default

Isn't that why they use a momentary switch?
When I did mine I only gave it a few quick taps on the switch, granted a PCM pulses it a lot quicker.
All mine on the Park Ave turned out ok, of course you do not want to give it constant voltage.
The guy did pulse his a bit much, and not fast enough, but as long as you do not keep the voltage on it is it really going to hurt it?
What cools them other than the fuel passing through?
Which the carb cleaner is the "fuel" when doing this.
WilliamE is offline   Reply With Quote
Old 10-10-2017, 03:49 PM   #22
Senior Administrator


Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Elmira, NY
Posts: 15,551
Thanked 958 Times in 751 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

PCM pulses the injectors on a millisecond scale, not seconds or minutes. Because they are only on briefly, they don't get hot enough internally to cause any kind of damage.

There is just enough fuel or cleaner going through to keep the injector cool during this normal intermittent duty cycle, unlike the constant cycle during the cleaning process which still allows sufficient heat to build up but not enough liquid is passing through.
Mike is offline   Reply With Quote
The Following User Says Thank You to Mike For This Useful Post:
WilliamE (10-10-2017)
Old 10-10-2017, 05:56 PM   #23
Senior Member

True Car Nut
 
WilliamE's Avatar
 
Join Date: Jun 2011
Location: VA
Posts: 3,087
Thanked 417 Times in 375 Posts
WilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond repute
Default

Makes sense, it is risky and something one would do at their own risk.
It did not hurt mine on the Park Ave, and I flushed and reverse flushed, but I only did about 6-7 clicks each way, with cleaner spraying out every time, so the solenoid was never doing its thing without cleaner to cool it.
Never felt any warmth from the solenoid area, I know that plastic is a bit thick though.

Not saying it is the best way to clean an injector, but I have seen 3-4 DIY injector cleaning videos, and nobody ever mentions ruining their injector, not saying you can't, I totally believe it is possible if you are careless.

Only good option to clean them would be a shop that has the kit to do it, cheapest I have seen a decent kit for is 285.00 OTC 7649 Fuel Injector Cleaning Kit, the cleaner alone is 16.00
I think you can get a cleaner kit for like 170.00 still expensive.
But replacing all injectors if you burn them up is an expense wasted, so I totally get your point.
WilliamE is offline   Reply With Quote
Old 10-10-2017, 07:53 PM   #24
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Oct 2010
Location: Georgia
Posts: 78
Thanked 15 Times in 14 Posts
joeld will become famous soon enough
Default

Lots of good information being gathered here!

So, now I have a question. How can a injector have LESS resistance after over 20 years of service? I could understand having more resistance due to wire being old, corrosion build up, etc.

Joel
joeld is offline   Reply With Quote
Old 10-10-2017, 08:01 PM   #25
Senior Member

True Car Nut
 
WilliamE's Avatar
 
Join Date: Jun 2011
Location: VA
Posts: 3,087
Thanked 417 Times in 375 Posts
WilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond repute
Default

That is a really good question.

It probably has shorted turns in the coil of the injector, not sure though I do not know injectors well, I am sure Mike or Tech II have a good idea..

It is possible that there were issues like a misfire in that cylinder in the past, and somebody got a different brand of injector, you'd expect it sill to have the same resistance, or within .5 ohms though.

Question, did you check the injectors while they were "hot", I read that you get more accurate results that way.
WilliamE is offline   Reply With Quote
Old 10-10-2017, 08:19 PM   #26
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Oct 2010
Location: Georgia
Posts: 78
Thanked 15 Times in 14 Posts
joeld will become famous soon enough
Default

I did both tests on cold engine.

Joel
joeld is offline   Reply With Quote
Old 10-10-2017, 10:28 PM   #27
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Oct 2010
Location: Georgia
Posts: 78
Thanked 15 Times in 14 Posts
joeld will become famous soon enough
Default

I decided to order the new AC Delco injectors #217307 and the o-ring kit #2173102 from Rockauto.

Appreciate all the comments and help
Joel
joeld is offline   Reply With Quote
Old 10-11-2017, 03:51 AM   #28
Senior Member

True Car Nut
 
WilliamE's Avatar
 
Join Date: Jun 2011
Location: VA
Posts: 3,087
Thanked 417 Times in 375 Posts
WilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond reputeWilliamE has a reputation beyond repute
Default

Some like to warm the motor for 15-20 minutes and then test, but it is not critical to do so..

Those AC Delco'* should be good to go for the remaining life of the car, I always recommend staying OE for all sensors, injectors, and any electronics for our GM vehicles.
I know some aftermarket brands do very well, but I have had issues with a few, so I'd rather stick to OE.

Let us know how it runs once you get the injectors in.

Oh yeah, sorry for not mentioning this sooner, you could have ordered one from RA, but since you are changing out all 6 you may want to consider changing the fuel filter.

ACDELCO GF578 {#25121293, 25121293NI} Professional is a good filter, but there are cheaper options.
That one is 11.32 on RA, they have a WIX 33311 that is around 9.00
It seems from RA most get this one for around 4.00 MAHLE/CLEVITE KL692
Or they get the AC Delco professional one.
WilliamE is offline   Reply With Quote
Old 10-16-2017, 07:35 PM   #29
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Oct 2010
Location: Georgia
Posts: 78
Thanked 15 Times in 14 Posts
joeld will become famous soon enough
Default

OK Got the injectors and O-rings today. The injectors have o-rings installed already, and new retainer clips. I'll just send the 2173102 o-rings back.

It'll be another few days before I get time to install. Need to install the new fuel filter so that will be done.

I did check the resistance and they all read 12.4/12.3.

Joel
joeld is offline   Reply With Quote
Old 10-17-2017, 06:25 AM   #30
Senior Administrator


Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Elmira, NY
Posts: 15,551
Thanked 958 Times in 751 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

If it were me, I'd keep those o-rings.
Mike is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Fuel Injector O-Ring Replacement w/ Fuel Rail Removal Nighthwk12 Mechanical 0 02-19-2011 07:10 PM
Fuel Injector Sight Shield markwb 2000-2005 2 07-02-2003 10:26 PM
Fuel Injector tips or caps that hold on the O ring???? Hal 1992-1999 2 06-04-2003 08:27 PM
Fuel Injector question Heath 1992-1999 9 02-09-2003 01:27 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:36 AM.