I just purchased an 86 944 NA that is generally in great condition. But, it does have a couple of fuel leaks bubbling up from where the injectors are seated on the manifold.
I have already done the following:
- Removed old O-rings and pintle "hats"
- Cleaned injectors with carb cleaner
- Replaced all o-rings, and pintle "hats" with genuine Porsche kits
- Cleaned the attachment points on the fuel rail and manifold
- Used ATF to lubricate the o-rings for installation
- Reinstalled
The injectors look fine, and I don't see any damage, cracks or gaps. The heads look fine too, but I noticed that the pintle seats would spin around on a couple of the injectors at least (didn't check all for spinning, noticed 1/2 way through, and couldn't tell on the first two with the new hats on). It is a pretty substantial leak, and enough that I won't drive it for fear of a fire.
The other thing is that it seems very difficult to get the fuel rail reattached and everything sealed well with the injectors on the rail first. So, I put the injectors in first and felt for that "snap" that gave them a snug fit. But, it seems very difficult to get the fuel rail to "snap" back on the injectors, so catch-22...
I'm trying to determine if this is a seal problem or a broken injector problem.
Please let me know what you think. Thanks!