injector swap Q's
#1
Senior Member
![](https://www.thirdgen.org/forums/images/ranks/tgo10.gif)
Thread Starter
Join Date: Jan 2008
Location: peterborough UK
Posts: 917
Likes: 0
Received 1 Like
on
1 Post
Car: 88 T firebird
Engine: 2.8
Transmission: t5
injector swap Q's
hi, im putting 3.4 injectors in my 2.8, the new ones look dirtier inside than the old ones, should i soak in injector cleaner - fuel additive stuff ? to clean them up before fitting ?
also all the o rings are in good condition but feel alittle dry, should i soak them in something before refitting?
thanks Ant
also all the o rings are in good condition but feel alittle dry, should i soak them in something before refitting?
thanks Ant
#2
Junior Member
Join Date: Jul 2009
Posts: 30
Likes: 0
Received 0 Likes
on
0 Posts
Car: 85 firebird
Engine: 3.1L v6
Transmission: 700R4
Axle/Gears: 3.42
Re: injector swap Q's
o rings are cheap buy new ones. serisouly there is no reason to cheap out on orings. Other than that I have no idea.
#3
Moderator
![](https://www.thirdgen.org/forums/images/ranks/tgo10.gif)
iTrader: (1)
Join Date: Mar 2002
Location: Chasing Electrons
Posts: 18,432
Likes: 0
Received 224 Likes
on
210 Posts
Car: check
Engine: check
Transmission: check
Re: injector swap Q's
hi, im putting 3.4 injectors in my 2.8, the new ones look dirtier inside than the old ones, should i soak in injector cleaner - fuel additive stuff ? to clean them up before fitting ?
also all the o rings are in good condition but feel alittle dry, should i soak them in something before refitting?
thanks Ant
also all the o rings are in good condition but feel alittle dry, should i soak them in something before refitting?
thanks Ant
I believe that the 3.4l injectors are also Multecs. If so I wouldn't use them just for that reason. Get yourself some Bosch injectors, you will be a lot better off in the end.
As for cleaning. I use a 6V AC transformer to cycle them while giving them a bath of mineral spirits (paint thinner) in an ultrasonic cleaner. The ultrasonic is one of the small household ones. Usually 3 injectors fit at a time and I use a small metal can instead of the plastic one.
I use motor oil on the o-rings prior to installation.
RBob.
#4
Junior Member
Join Date: Sep 2009
Location: Middletown, NY
Posts: 30
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 RS
Engine: 350
Transmission: 350 turbo
Axle/Gears: 3.73
Re: injector swap Q's
I have a set of 6 injectors that are good to go if wanted. looking for 50 bucks for the set. 8456991404 -tom
#5
Supreme Member
![](https://www.thirdgen.org/forums/images/ranks/tgo10.gif)
iTrader: (2)
Join Date: May 2007
Location: right behind you
Posts: 2,574
Likes: 0
Received 0 Likes
on
0 Posts
Car: '85 maro
Engine: In the works...
Transmission: TH700 R4
Axle/Gears: 3.73 posi
Re: injector swap Q's
I tried the 3.4 injectors awhile ago and I didn't like the response- compared to F1ZE's anyway. Felt like I would've had to add alot of 'pump shot' to the accel enrich table to get it to respond like the F1ZE's.
#6
Supreme Member
![](https://www.thirdgen.org/forums/images/ranks/tgo10.gif)
iTrader: (8)
Join Date: Aug 2003
Location: LeRoy, NY
Posts: 7,240
Likes: 0
Received 6 Likes
on
5 Posts
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: injector swap Q's
RBob, that's good info for the injector cleaning.
Where might I nab one of those AC transformers?
As for the 3.4 injectors, your engine WILL be running rich and throwing a code 45, even if they don't leak (which is why I removed them... they are also the same ones used on the 3100). The stock injectors are rated between 14 and 15.5#/hr, and the 3.4 injectors are about 18.4#, IIRC. I posted a link a few months back to a site that had injector reference data. I thought I had the site bookmarked for reference, but I don't.
![thumbs up](https://www.thirdgen.org/forums/images/smilies/thumbsup.gif)
As for the 3.4 injectors, your engine WILL be running rich and throwing a code 45, even if they don't leak (which is why I removed them... they are also the same ones used on the 3100). The stock injectors are rated between 14 and 15.5#/hr, and the 3.4 injectors are about 18.4#, IIRC. I posted a link a few months back to a site that had injector reference data. I thought I had the site bookmarked for reference, but I don't.
Trending Topics
#8
Moderator
![](https://www.thirdgen.org/forums/images/ranks/tgo10.gif)
iTrader: (1)
Join Date: Mar 2002
Location: Chasing Electrons
Posts: 18,432
Likes: 0
Received 224 Likes
on
210 Posts
Car: check
Engine: check
Transmission: check
Re: injector swap Q's
12.6V CT 3.0A Chassis-Mount Transformer with Leads
Model: 273-1511 | Catalog #: 273-1511
More info on their site. With it having a center tap (CT), wire injectors between one leg and the center tap. That will provide 6.3V to an injector.
Note that both legs can be used. So wire one injector between one leg and the CT, then another injector between the other leg and the CT.
Being a 3A output can easily run 4 injectors (two on each leg in parallel) at a time.
Can also wire injectors in series across the two legs. Need to do this in pairs and the CT won't get used.
RBob.
#9
Sponsor
Re: injector swap Q's
We have 15lb and 17lb bosch injectors in stock that are cleaned and flowtested and come with a 3 year warranty, if you are interested we will be more than happy to give you a discounted price.
pm
info@southbayfuelinjectors.com
516-492-6504
pm
info@southbayfuelinjectors.com
516-492-6504
#10
Senior Member
![](https://www.thirdgen.org/forums/images/ranks/tgo10.gif)
Thread Starter
Join Date: Jan 2008
Location: peterborough UK
Posts: 917
Likes: 0
Received 1 Like
on
1 Post
Car: 88 T firebird
Engine: 2.8
Transmission: t5
Re: injector swap Q's
good info guys thanks, the ecu will adjust somewhat so i shouldnt run too rich, it gives me more scope for tuning in the future, and eventually when a 3.4 finds its way in there anyways :-)
emisions wise, i dont need any of my emisions gubins or a cat to pass my emisions test - UK
thanks again
emisions wise, i dont need any of my emisions gubins or a cat to pass my emisions test - UK
thanks again
Thread
Thread Starter
Forum
Replies
Last Post
Street Lethal
Power Adders
634
04-30-2019 12:14 PM