New ignition coil throwing P0351 after a couple of days

[HeDog]

Just replaced my stock ignition coil because it was throwing P0351 and P0352 codes. Started the car and it ran great for a couple of days until the stock FPR started leaking (don't use the thing & had to replace it). Anyhow, got the FPR installed, started the car and 10 minutes, guesstimate, after I started it she starts increasing in RPM's, bounces RPM's, bogs down & dies. CEL light comes on and it's a P0351 again. Take the coil out and check it.

Primary
1 & 4 - .9
2 & 3 - .9
Is .9 high? Based off of Chilton's I think it said between .5 and .6


Secondary
1 & 4 - 12.25
2 & 3 - 12.37

Not sure what my next step is. If .9 is high I'll replace the coil, but if not, what else is included in the P0351 that I can check?

Thanks guys. Also, it's good to be able to come back to this forum and see that it's thriving like crazy!

 

[CODE4]

What brand is the ignition coil? Some have higher failure rates than others (for example, I had two consecutive MSDs fail before I wrote them off).

Check the pigtail connection to the coil and verify the pins are in good shape. I see that you are a 95, and assume you have the round pin style, unless you replaced your pigtail with the newer connector.

For information on OBDII trouble codes, just perform a simple google search:

DTC P0351 Ignition Coil A Primary/Secondary Circuit Malfunction

 

[HeDog]

It's from Autozone (Duralast). I'll recheck the wiring & connectors again. I wonder if I did something while I was replacing the FPR, I was all over the engine bay trying to get that damn snap ring in. Maybe I bumped something loose.

Thanks man.

I think it's fixed, but I have no idea what happened.

I checked continuity on my plug wires and found that 1 & 4 were bad (possibly why I was getting a P0351 again). Replaced the wires, started her up and she ran longer, about 17 minutes, then died like before. Got her barely running, pulled each plug wire to listen for the spark and the car started revving at 2200 rpm's with no hesitation for a couple of minutes ( I almost shut it off). I then pulled each wire again to check spark while the car was running and then taking about 5 minutes or so the idle slowly went down to 900 rpm's and stayed there.

Just went out, she started right up and idled for 30 minutes with very slight RPM variation. It's like the ECU had to reprogram itself for the proper idle. I dunno.

I'll find out tomorrow if it's temporary.