TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Sponsored by:
Sponsored by:

why do my new injectors leak down quickly

Thread Tools
 
Search this Thread
 
Old May 4, 2008 | 11:05 AM
  #1  
jjlabinski's Avatar
Thread Starter
Senior Member
20 Year Member
 
Joined: Dec 2004
Posts: 556
Likes: 0
From: my garage
Car: 84 firebird T/A
Engine: shinny 350
Transmission: slush box L65
Axle/Gears: Torsen "3.73"
why do my new injectors leak down quickly

Can anyone offer an opinion why my new accel 24 lb injectors bleed of pressure quickly when the engine is turned off?
thx
Jeff
Reply
Old May 4, 2008 | 11:34 AM
  #2  
afremont's Avatar
Supreme Member
 
Joined: Feb 2008
Posts: 1,004
Likes: 1
Car: 90 IROC
Engine: 5.7 TPI
Transmission: 4L60
Axle/Gears: 3.23
Re: why do my new injectors leak down quickly

How do you know for sure that it's the injectors? It could be the fuel pump or plumbing. Did you put a new fuel filter in? Is there any possibility you got dust or dirt into the injectors during the install?
Reply
Old May 4, 2008 | 02:41 PM
  #3  
Theking's Avatar
Senior Member
20 Year Member
iTrader: (1)
 
Joined: Jan 2006
Posts: 930
Likes: 6
From: Sweden
Car: 1989 IROC-Z
Engine: 350 TPI
Transmission: Th700R4
Axle/Gears: 3.27
Re: why do my new injectors leak down quickly

Is there yellow or silver/white accel injectors.. My Accel injectors (yellow) seems to be bad, (not all of them but some...)

I think I will buy new ones, Ford Racing injectors instead..

You can try and see if its the pump / or injectors / regulator..
Sqeeze the return hoose and see if the pressure holds.. if it holds your regulator or injectors are bad..

If you sqeeze the input after shutting of the ignition and the pressure holds its the pump, (f you remove the clamp and the pressure drops its going back thru the pump..)

If you start the car and remove the vacuumhose from the regulator, if it comes out fuel its bad.. you need to change the regulator.. if not, there may be your injectors that are bad..
Reply
Old May 5, 2008 | 06:21 PM
  #4  
jjlabinski's Avatar
Thread Starter
Senior Member
20 Year Member
 
Joined: Dec 2004
Posts: 556
Likes: 0
From: my garage
Car: 84 firebird T/A
Engine: shinny 350
Transmission: slush box L65
Axle/Gears: Torsen "3.73"
Re: why do my new injectors leak down quickly

I have replaced everything it is the injectors they are the yellow 24 lb ones.

Anyone have a suggestion for a decent 24 lb injector? part#?

thx

Jeff
Reply
Old May 5, 2008 | 09:25 PM
  #5  
irocuroc's Avatar
Senior Member
 
Joined: Mar 2008
Posts: 428
Likes: 0
From: nj
Car: 89 iroc
Engine: l98
Transmission: tremec
Re: why do my new injectors leak down quickly

Originally Posted by jjlabinski
I have replaced everything it is the injectors they are the yellow 24 lb ones.

Anyone have a suggestion for a decent 24 lb injector? part#?

thx

Jeff
hi my brother has a set of Bosch 24 part 0280150947 used 1 day at the track trying to get his mustang right.. had to go to 30's.. he wants 150 for the 8.. they are perfect
Reply
Old May 7, 2008 | 05:03 PM
  #6  
jjlabinski's Avatar
Thread Starter
Senior Member
20 Year Member
 
Joined: Dec 2004
Posts: 556
Likes: 0
From: my garage
Car: 84 firebird T/A
Engine: shinny 350
Transmission: slush box L65
Axle/Gears: Torsen "3.73"
Re: why do my new injectors leak down quickly

I am thinking about your offer. I kinda hate buy buy stuff not specific to my application

thx

jeff
Reply
Old May 7, 2008 | 10:34 PM
  #7  
irocuroc's Avatar
Senior Member
 
Joined: Mar 2008
Posts: 428
Likes: 0
From: nj
Car: 89 iroc
Engine: l98
Transmission: tremec
Re: why do my new injectors leak down quickly

Originally Posted by jjlabinski
I am thinking about your offer. I kinda hate buy buy stuff not specific to my application

thx

jeff
jeff the only reason that bosch injectors are not in you car is because of the contract with rochester products,, gm had to use that crap multec injector.. 85-88 had bosch in them.. then in 97 they went back to bosch.. now delphi has the contract.. the bosch work great in our engines
Reply
Old May 8, 2008 | 12:48 AM
  #8  
Theking's Avatar
Senior Member
20 Year Member
iTrader: (1)
 
Joined: Jan 2006
Posts: 930
Likes: 6
From: Sweden
Car: 1989 IROC-Z
Engine: 350 TPI
Transmission: Th700R4
Axle/Gears: 3.27
Re: why do my new injectors leak down quickly

Yeah the bosch are really good, alot better then Accel yellow injectors.

The new White/silver Accel injectors are very good they say... I have the yellow ones, and its not running right with them...
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jklein337
Tech / General Engine
2
Sep 19, 2018 06:23 PM
Infested
Tech / General Engine
3
May 22, 2018 11:56 PM
bamaboy0323
Tech / General Engine
25
Sep 3, 2015 06:07 AM
mike_c
TPI
4
Aug 27, 2015 04:32 PM




All times are GMT -5. The time now is 12:05 PM.