Ford injectors
Thread Starter
Instructor
Joined: Jun 2005
Posts: 135
Likes: 0
Ford injectors
Hi all,
I just swapped out my 90 L98 OEM injectors with some Ford "pink tops'". (Hat tip to member SamLam for an excellent guide on doing this job and a personal thanks for tons of help with this!).
Anyway, since these injectors are shorter, I did not use the clips on install. After everything back together, at least two of the injectors leak, one of them just pours gas from the fuel rail. Took apart to inspect and saw nothing out of the ordinary (no damage to o-ring).
Here's what I did on the install:
1. lubed both o-rings with 3-in-1 oil, but did NOT take them off injectot.
2. inserted into fuel rail (no clips).
3. installed fuel rails
4. tightened all bolts according to shop manual with torque wrench.
Suggestions on how to proceed? I'd like to use the pink tops, as I've got $300 in them.
Thanks to all for your help!
I just swapped out my 90 L98 OEM injectors with some Ford "pink tops'". (Hat tip to member SamLam for an excellent guide on doing this job and a personal thanks for tons of help with this!).
Anyway, since these injectors are shorter, I did not use the clips on install. After everything back together, at least two of the injectors leak, one of them just pours gas from the fuel rail. Took apart to inspect and saw nothing out of the ordinary (no damage to o-ring).
Here's what I did on the install:
1. lubed both o-rings with 3-in-1 oil, but did NOT take them off injectot.
2. inserted into fuel rail (no clips).
3. installed fuel rails
4. tightened all bolts according to shop manual with torque wrench.
Suggestions on how to proceed? I'd like to use the pink tops, as I've got $300 in them.
Thanks to all for your help!
Team Owner
Joined: Jan 2003
Posts: 20,324
Likes: 250
From: Summerland B.C. Canada
I'm using the clips on my pink tops. No leaks when i had them installed in the stock intake or my accel intake that they are in now. I believe people think they are short when compared side by side due to the long tip on the stocker. When measured from top O ring to clip and from clip to bottom O ring, i bet they are really close. 
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
Are you sure you don't have some old 0 rings in there. I don't recall anyone having the leakage problem, but aren't there two positions for the clips? I maybe thinking of different injectors...but I thought one of the positions for the clips had to be modified for the clip to fully engage?
Le Mans Master
Joined: Aug 2004
Posts: 5,141
Likes: 7
From: Metairie Louisiana
I measured my SVO's next to my stock Lt1 injectors and they were realy close in size. The SVO's were different in that they had two rings around the injectors for the clips. One ring did not allow the clip to go completely around the injector. The second ring allowed the clip to go completely around it. The second one is the ring I used for the clips. It seemed as though the injectors did not seat all the way down. When I called Summit they said this is normal and that it can cause problems if they were seated or forced too far down. This was with my LT1 I do not know if yours is different. I did not have to alter the injectors in any way. I would try to use the clips if possible. Maybe you have a faulty injector.
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
That's what I was referring to rickreeves, I thought some members had taken a hacksaw blade or something and modified the ring so the clip could go in. But honestly I don't know if you need to do this?
Le Mans Master
Joined: Aug 2004
Posts: 5,141
Likes: 7
From: Metairie Louisiana
Originally Posted by rick lambert
That's what I was referring to rickreeves, I thought some members had taken a hacksaw blade or something and modified the ring so the clip could go in. But honestly I don't know if you need to do this?
Le Mans Master
Joined: Aug 2004
Posts: 5,141
Likes: 7
From: Metairie Louisiana
Originally Posted by rick lambert
Obviously I don't remember who, or how many guys posted about this...but, I do know someone did, and what they did, once again though, I don't know if it's necessary.
http://forums.corvetteforum.com/show...injector+clips
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Thread Starter
Instructor
Joined: Jun 2005
Posts: 135
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Ford injectors
The pink tops are too short.
When lined up with an OEM (clip on place) there is no way to "line up" the bottom o-ring on the pink top with the OEM injector's bottom o-ring and have the Ford injector stay in the fuel rail.
Bruce at 5-O said to use them without the clips, and I beleive that a few other forum members have not used them.
Forgive me if I seem a bit dim, but doesn't all the clip do is hold the position of the injector? If gas is going to blow by the o-ring (as in may predicament) the clip won't matter?
So, what do I do? I'm inclined to put the multitecs back in (except for the two that are bad) and find two that are ok and put them in. Bad idea? Maybe, but right now my 90 just sits in my garage.
When lined up with an OEM (clip on place) there is no way to "line up" the bottom o-ring on the pink top with the OEM injector's bottom o-ring and have the Ford injector stay in the fuel rail.
Bruce at 5-O said to use them without the clips, and I beleive that a few other forum members have not used them.
Forgive me if I seem a bit dim, but doesn't all the clip do is hold the position of the injector? If gas is going to blow by the o-ring (as in may predicament) the clip won't matter?
So, what do I do? I'm inclined to put the multitecs back in (except for the two that are bad) and find two that are ok and put them in. Bad idea? Maybe, but right now my 90 just sits in my garage.
Pro
Joined: Nov 2003
Posts: 692
Likes: 1
From: Peabody Ma.
Street and Performance will clean,flow match them, and you could even probably buy just 2 of them. They also sell the ford blue caps for around $300 I used them with no leaks but I dont know the difference? I think the blue ones are 29 or 30 lbs
Team Owner
Joined: Jan 2003
Posts: 20,324
Likes: 250
From: Summerland B.C. Canada
You could always shorten the bolt towers on intake so the injectors will sit further down into the intake. Can you take a pic of both injectors side by side. I remember comparing mine and found no real difference other than the pintle being longer on the stock unit.
Thread Starter
Instructor
Joined: Jun 2005
Posts: 135
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Ford injectors
Originally Posted by AGENT 86
You could always shorten the bolt towers on intake so the injectors will sit further down into the intake. Can you take a pic of both injectors side by side. I remember comparing mine and found no real difference other than the pintle being longer on the stock unit.
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
Not sure what a member (Mudslide) ended up doing, but I do remember he was concerned about 0 rings, size wise. If I remember correctly he ended up buying some new ones from GM. But I can't remember what injectors he used.
Thread Starter
Instructor
Joined: Jun 2005
Posts: 135
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For injectors
All,
Thanks for advice. Here's what I did:
inserted injectors into rail using the old clamps in top groove to hold in place.
attached and torqued down fuel rails, x-over tubes and brackets.
Attached fuel lines
pressurized system by turning ignition (as outlined in manual)
NO LEAKS! (no doubt about at least some pressure in system)
So tomorrow I'll put in plenum, throttle body and required vacuum lines and electricals and see if it runs!!
Thanks for advice. Here's what I did:
inserted injectors into rail using the old clamps in top groove to hold in place.
attached and torqued down fuel rails, x-over tubes and brackets.
Attached fuel lines
pressurized system by turning ignition (as outlined in manual)
NO LEAKS! (no doubt about at least some pressure in system)
So tomorrow I'll put in plenum, throttle body and required vacuum lines and electricals and see if it runs!!
Racer
Joined: Sep 2005
Posts: 385
Likes: 8
From: north branford ct
Originally Posted by dave_85
Don't know if the 90 is different but on my 85 I used GM O-rings with the pink tops and the clips. The Ford O-rings were too small.
I just changed mine on my 1990 L98 with pink tops from 5-0 and the o-rings that came with the pinktops where a hair small and the injector felt loose in the bore---I changed them out with the ones in the gasket kit and no leaks ---check your o-rings I think that could be it PS I did use the clips in the top groove
Last edited by mudslide; Sep 21, 2006 at 09:11 AM.