I am trying to figure out a no spark issue with my 2003 AP1. Car dies randomly last week while driving. The CEL was flashing and I pulled the misfire code. The plugs were soaked with fuel and I could not see any spark when I tried cranking with the coil pulled out and grounding the sparkplugs. I checked the two cam position sensors and the crank sensor and all three test within range. I have tried new coils and plugs. No change. I have 12V and good ground on the coils but no pulse signal to spark. I am starting to believe it is a bad ecu. Any ideas?

 

Have you gotten any CEL's?

 

The initial code was P1399. The CEL has not turn back on since I cleared it.

 

Have you done any recent modifications, prior to the problem?

 

Completely stock car. No problems recently. Replaced the battery about 3 months ago due to battery dying.

 

Any chance that a grounding wire is bad?

 

what brand of coils and plugs did you use for replacements? where did you buy them?

 

I checked the ground on the back of the head. It was secure and clean. I checked the ground on the coils to chasis ground and it was good on all four coil wire plugs. I went with the denso coils and the ngk plugs. They were all factory numbers. I grabbed them off of Amazon.

 

whoops.

Well...you may want to source new ones from somewhere reputable. A dealer is best. Rockauto is probably a good bet too.

There's a heavy chance you received fakes. And in that case, a heavy chance they won't work from day 1.

 

That is a possibility but why would all 4 of the old ones be bad? I tested all four of the old and new coils and still can not get any spark.

I have another question- common step to testing for spark was to pull the fuel pump fuse under the dash. However doing this also cuts power to the ecu. Wouldn't pulling the fuse keep the ecu from powering up at all? It didn't matter in my cause, I tried it both ways and still no spark either way. Putting the fuse in just resulted in wet plugs and heavy gasoline smell.