Question for 1982 Crossfire owners
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 924
Likes: 15
From: DFW Metroplex Texas
Originally Posted by Twin_Turbo
the diaphragm is most likely shot, buy a TBI rebuild kit, it's just a bunch of gaskets, o rings and steel rings..these TBIs are rediculously easy to rebuild. Install all the new seals, rings, filters and stuff..most likely the higher flow pump put more strain on the system causing the old stuff to leak.
Complete kit ordered today.
Thanks guys for the help!!!
Racer
Joined: Dec 2005
Posts: 474
Likes: 127
From: Stafford Virginia
Where did you order yours from?
I ordered the rebuild kits from gmpartsonline.com but I don't remember that part coming with it. I'll go check my bag of goodies. I want to be prepared incase the same thing happens to me.
I ordered the rebuild kits from gmpartsonline.com but I don't remember that part coming with it. I'll go check my bag of goodies. I want to be prepared incase the same thing happens to me.
Last edited by 1FSTZ06; Mar 8, 2006 at 08:11 PM.
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 924
Likes: 15
From: DFW Metroplex Texas
Originally Posted by Zixxer
Where did you order yours from?
Zixx,
I got mine ordered from the local Autozone. It's suppose to be here Friday.
The kit is from GP Sorensen and called aTBI Kit, part number 96-629.
This is the link to advanced auto that shows the kit.
http://www.partsamerica.com/ProductD...pe=428&ptset=A
Racer
Joined: Dec 2005
Posts: 474
Likes: 127
From: Stafford Virginia
Thanks much!! Now I'm more upset at the GM parts setup...I order two kits which cost more then the one you provided and didn't include the gaskets between the air cleaner and bodies AND no fuel pressure gaskets and took two weeks to get. Live and learn.
Last edited by 1FSTZ06; Mar 8, 2006 at 09:42 PM.
Racer
Joined: Dec 2005
Posts: 474
Likes: 127
From: Stafford Virginia
I understand there's a fuel hose in the sending unit that I should replace and apparently a certain grade of hose.....did you do yours, if so, any particular hose? We have all the major auto stores locally so I was just going to pull the existing one and head to one of them. I just want to ensure the "grade" or rating of hose is correct. Thanks Rick
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 924
Likes: 15
From: DFW Metroplex Texas
Originally Posted by Zixxer
I understand there's a fuel hose in the sending unit that I should replace and apparently a certain grade of hose.....did you do yours, if so, any particular hose? We have all the major auto stores locally so I was just going to pull the existing one and head to one of them. I just want to ensure the "grade" or rating of hose is correct. Thanks Rick
If you have any questions on the install, shoot me a PM and I'll be glad to help.
Safety Car
Joined: Jan 2004
Posts: 4,776
Likes: 142
From: North of Atlanta GA
St. Jude Donor '05
O.K. I don't understand, why would you go with an '85 fuel pump that pushes more gas??? I replaced my '82 fuel pump with a '82 replacement (borg-Warner) and it runs GREAT! I could tell the difference when I first started up, car ran much better and has been running fine ever since, no leaks at all.
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Race Director
Joined: Feb 2006
Posts: 13,138
Likes: 0
From: Inside the woods living my passion
St. Jude Donor '07-'08
Originally Posted by TexasYankee
According to the Crossfire forums, replacing the existing fuel pump with a 1985 pump is a easy mod that many have done and recomend.
I just finished installing a '85 fuel pump in my '82 Vette. The good news it it works! The old FP looks like it was the original and was in terrible condition.
She started right up and ran for 1 minute then died.
The Bad news is, fuel is gushing out of the rear injector. I'm fortunate I didn't catch fire!
It looks like the gas is coming out of the top of the injector and not the bottom where it attaches to the manifold.
This injector is the original. I had to replace the other (front) recently because it was leaking. I was told the rear was ok, but may need replace in the future. I assume the new pump has exposed a weakness in the old injector.
Questions:
Is the pressure regulated to 13PSI prior to supplying the rear injector?
Does it look like I'm going to have to replace the rear injector, or is it possible I just need to adjust the pressure coming into the rear injector.
How hard a job is it to replace of of these?
Thanks!
I just finished installing a '85 fuel pump in my '82 Vette. The good news it it works! The old FP looks like it was the original and was in terrible condition.
She started right up and ran for 1 minute then died.
The Bad news is, fuel is gushing out of the rear injector. I'm fortunate I didn't catch fire!
It looks like the gas is coming out of the top of the injector and not the bottom where it attaches to the manifold.
This injector is the original. I had to replace the other (front) recently because it was leaking. I was told the rear was ok, but may need replace in the future. I assume the new pump has exposed a weakness in the old injector.
Questions:
Is the pressure regulated to 13PSI prior to supplying the rear injector?
Does it look like I'm going to have to replace the rear injector, or is it possible I just need to adjust the pressure coming into the rear injector.
How hard a job is it to replace of of these?
Thanks!
What's the link to the crossfire forum?? Like i said before what kind of gain are you going to get with a 85 fuel pump? I have 104 k on my stock set up and never misses a beat..
Racer
Joined: Dec 2005
Posts: 474
Likes: 127
From: Stafford Virginia
The gain is ensuring sufficient pressure all the time over the life of the pump. The 82 pump is a 9-13 PSI pump, no more, so as it ages apparently you lose some PSI and while they say the engine can run with as low as 9 PSI a lot of folks report really poor performance, bad idle, surges, etc. The 85 gurantees you'll be able to see the 13 PSI you want all the time.
No one that has installed them reports anything but a huge difference in the way their car runs. In fairness, installing an 82 pump will give you that same feeling, just apparently diminishes over time. I'd rather start with a pump that runs 30 PSI and maybe loses a little over time then 13 PSI.
No one that has installed them reports anything but a huge difference in the way their car runs. In fairness, installing an 82 pump will give you that same feeling, just apparently diminishes over time. I'd rather start with a pump that runs 30 PSI and maybe loses a little over time then 13 PSI.
Racer
Joined: Dec 2005
Posts: 474
Likes: 127
From: Stafford Virginia
Thread Starter
Burning Brakes
Joined: Nov 2005
Posts: 924
Likes: 15
From: DFW Metroplex Texas
Originally Posted by pcfred
O.K. I don't understand, why would you go with an '85 fuel pump that pushes more gas??? I replaced my '82 fuel pump with a '82 replacement (borg-Warner) and it runs GREAT! I could tell the difference when I first started up, car ran much better and has been running fine ever since, no leaks at all.
This is all new to me though and until I get the pump in and run for a while, I'm just repeating stuff I've read and heard. All the people that have made this upgrade on the crossfire forums report nothing but good results.
The leaks I'm experiencing are due to 24 year old seals it appears. The diaphram in the picture I posted would have most likely failed with a new '82 pump anyways.
If you have just installed a new '82 pump, I doubt yanking it out now and putting a '85 in would gain you anything noticable.
Still waiting on my kit to arrive tomorrow.
Race Director
Joined: Dec 1999
Posts: 16,945
Likes: 9
the difference is also very noticable if you hot rod your engine and the fuel consumption increases to the point where the pump can't flow enough to have the regulator maintain the 13psi pressure (meaning the pump has to flow more than the engine consumes!!!)
I think I was one of the first, if not the first to install an 85 pump. I initially installed it because I couldn't get another pump within a short period of time (this stuff is not readily available here) and the throttle response got much better, gone was the tip in, the stumble and the occasional hickup.
Installing the later pump is nice when you need a new pump anyway, if you have a new TBI pump there's no reason to change it.
I think I was one of the first, if not the first to install an 85 pump. I initially installed it because I couldn't get another pump within a short period of time (this stuff is not readily available here) and the throttle response got much better, gone was the tip in, the stumble and the occasional hickup.
Installing the later pump is nice when you need a new pump anyway, if you have a new TBI pump there's no reason to change it.
Last edited by Twin_Turbo; Mar 9, 2006 at 02:29 PM.
Racer
Joined: Dec 2005
Posts: 474
Likes: 127
From: Stafford Virginia
Well I couldn’t be happier; I've discovered the root of my poor idle. The distributor was a tooth off. After attempting to time the car and even having a local "tune up" shop scope the car only to tell me it's a bad distributor I went back to checking everything myself.
I pulled the cap and watched the rotor in relationship to the TDC timing mark on the balancer. I know they can slip but this engine is fairly low miles and I know the previous owner had an ACCEL coil which I replaced immediately thinking it was the problem.
After pulling the plug and verifying with my finger over the hole I knew something was wrong. Once I moved the distributor over a tooth and reset the timing.....bingo,...we have a really good running car.
I need to sync the TBs and reset the TPS but I couldn't be happier with the huge improvement already. Life is good right now.
I pulled the cap and watched the rotor in relationship to the TDC timing mark on the balancer. I know they can slip but this engine is fairly low miles and I know the previous owner had an ACCEL coil which I replaced immediately thinking it was the problem.
After pulling the plug and verifying with my finger over the hole I knew something was wrong. Once I moved the distributor over a tooth and reset the timing.....bingo,...we have a really good running car.
I need to sync the TBs and reset the TPS but I couldn't be happier with the huge improvement already. Life is good right now.
