Hi again,

Did more diagnosing on my 90 2.3 (my threads are all over FTE!) & found the intake coil primary @ 1 ohm & secondary @ -0- ohms when it's suppose to be 11-14k ohms.

Also checked for coil to ground has none.

And truck still runs but won't perform step 2 of the EEC-IV diagnostics testing.

Bad coil or what?

 

Just have cheked mine, about 0.8 ohm primary and 7 Kohm secondary.


11-14 K - coil wont working, spark is weak.

0,8 ohm means that max coil current shoul be about 15 Amp/, but really it is much lower, becouse coil has 7-8 mHn inductance. To prevent coil overheating TFI opens switch if no PIP pulses in 2 seconds, like ECU turns fuel pump off.

 

Hi Pablo-UA,

Retested & new findings:

Amongst all the other new parts that I have added to this truck I also found that intake coil recepticles 1 & 3 had -0- ohms & 2 & 4 have 14k ohms. The exhaust both sets 14k ohms. As for the intake coil I changed it out & both sets on it measures 14k ohms.

And still can't get EEC-IV >no distributor< diagnostic codes in part 2 engine just ramps up & down.

OH YEAH! Thank you for checking yours out so you could tell me what they are.

 

What are intake and exhaust coils??? jd

 

Hi jimdandy,

Every once in a while I feel that I'm being tested here @ FTE...like now!

The 2 coil packs on a 2.3 EFI; intake & exhaust

 

What are intake and exhaust coils??? jd
_______________________________________
He means primary and secondary coils (ore low voltage and high voltage).

Now here coils on plug are popular, but really it is not a coil only, but ignition module and coil in one unit....

 

Hi again Pablo-UA, my other friend,

OK! As I tested both of these coils I found them to be exactally the same w/ respect to the input voltage; 12-14VDC, & their ohmage values; 14k ohms, and when I went out on line there was no seperate listings from AutoZone here in Connecticut.

With this EEC-IV-EFI truck the ignition module is mounted in front of the intake manifold & both coils are mounted in front of their respective #1 cylinders; 1 on the intake side & 1 on the exhaust side (8 plugs to change out..what a bother!)

Also thank you for your continuing help.

 

Nothing wrong with being tested. It helps us all to learn. The link is no help, doesn't tell me anything. I assume from your latest post that the intake/exhaust reference is to location/mounting??? jd

 

Hi jimdandy,

Sorry, hope this works:

On the intake side of the 2.3 engine a 4-tower spark plug coil is mounted on a bracket & is used instead of the trditional single tower coil & is thusly used for firing off 4 plugs in a random order & the same exhists on the exhaust side for the other 4 plugs hence the 8 plugs needed in this 4-banger Lima engine which makes it one of the best in it's emissions class is what I have gathered.

Does this help?

 

Yep!! Thanks. jd

 

Hi jimdandy,

Glad to assist!