As I continue to work on the 93, I developed a skip on the motor while running. I figured it was no big deal cause I haven't got to any of the tune up parts yet. Yesterday I changed plugs and wires and the skip is still there. I had the ignition module tested at Napa today and it passed all 5 tests both times tested. No one local here seems to be able to test the coils (or willing to) so I used the procedures in Techinfo to test them . Nothing seemd out of the ordinary. The primary resistance was 1.0 to 1.2 ohms and the continuity buzzer on the multimeter buzzed. The secondary resistance was 5.84 to 5.87 k ohms.

I'm scratching my head on this one wondering what it could be. I posted a problem about a high idle condition after removing and cleaning of the TB. I was wondering if injectors could be be a suspect of both problems.

Welp, Captian Obvious swooped down from the stratosphere and told me to disconnect the injectors one by one while the car was idling. When I disconnected injector #3, there was no change in idle. Disconnecting the others made it idle even worse.

So I have a faulty injector, it seems. What now? Just replace it? Have it tested? Cleaned?

Well it depends on if its a clog or an electrical problem.

Start off by starting the car and listening carefully to the injector, you should hear it tick.
If not then check voltage at the connector.

Then you can do a leak test. Free way - Raise the fuel rail with paper towels under the injectors and pressurize the system. Look for that #3 injector to leak.

Depending on what happens with the above stuff you can look at getting them cleaned/rebuilt.

the only thing you proved by disconnecting the injector is which cylender it came from. try a comression test. if your compression test goes well it is a fuel system problem (assuming the rest of the ignition system is fine).

I guess that I wasn't thinking of it that way. Can I remove the new plug to narrow the problem down? What can I expect to find if it is fuel related? Spark related? I don't own a compression tester so I guess this is a good time to invest in one. I'll try a compression test tomorrow on that cylinder too and see that I get.

I used the screwdriver up to the ear trick to check the injector for clicking and it was. It seemed a litter quieter than the other two front injectors though.

is it skipping like a little school girl? heh, I just had to ask!

sorry can't help, I can just make a joke

-justin

OK, here'* the latest. I swapped the 1/4 and the 3/6 coil this morning. Started it up and disconnected the #3 injector. The idle was worse. I then disconnected the #1 fuel injector and the idle remained the same. My problem has moved from the #3 cylinder to the #1 cylinder with the coil swap. Soooooooo...

It looks like it is the coil to blame (that is if my troubleshooting was done in the correct way). My next question is should I replace it with a stock-like coil or can it be upgraded without doing the other 2 at the same time?

upgrade man!! go all out. you can wait on ebay for a good deal to come by [there is one seller selling MSD'* 3/$100 I think]. Or you can wait a little like I did, and see if someone is selling a used set. I have yet to find the MSD coils in Jeg'*, it seems they have discontinued them.


-justin

Your stock coils provide plenty of spark. I'd say just get the OEM kind.

too much is never enough


-justin