80 Cis:
I am getting a slight skip that goes away if the rpms are about 900-1K
This plug was back when I started on the car and seems to be the only one that has this look.
Consensus on a bad injector?

https://picasaweb.google.com/tampapi...eat=directlink

 

No one wants to follow a link. Here's the pic.

 

Does not look THAT much different, but curious, at least. If the compression is good and the plug wires are good, then it has to be either the FD or the injector. It would be a pretty easy experiment to swap injectors from cylinder to cylinder. If it does not follow the injector then you might be able swap the injector lines coming out of the FD, and confirm that it follows the FD port. If it does then you are looking at a FD rebuild. Someone recently posted a $150 rebuilding service that worked out well for them.

 

Do the swapping Karl suggests, should localize the source of the problem. I had a car once with a cold misfire. Localized the cylinder, swapped plugs -same. Swapped plug leads - same. Swapped dist cap, same. Swapped rotor, same The spark trigger was a reluctor triggered by small bar magnets spinning on the dizzy shaft - one was a tad weak, such then when clearance was at max, misfied. Closed clearance to min spec, problem solved.
With luck the injector will be easy, but some have had big issues here. replacing one injector would be cheap, esp if you go for the brass MB units , which have been reported as working fine.
jp 83 Euro S AT 53k.

 

I am trying to borrow an injector to see if that cures it. When I first replaced the plug it was covered in black it is not as bad now after some sea foam. When you remove this will I need to replace the seal, I rather just do it one time I don't like swapping parts.

 

If you can borrow an injector complete with screw in part and seal, just swap that in. If its a bare injector, and you have to fit it to your threaded part and seal, it may be difficult to fit, as usually the seals are a PITA to remove and refit - they go pretty hard with age and heat.
jp 83 Euro S AT 53k

 

Yes, as mentioned above it will be a lot easier to swap the whole injector assembly, including the rubber seal and the bung. Sometimes they are hard to break loose without damage, but it should be possible. If you don't like swapping parts around for your testing, you could consider going to Roger for a complete set of new MB injectors, as well as seals. The price is pretty reasonable, and they work well. No more than 50% chance that the injector is your problem, though, I would think.