3 Cylinders Misfire at once?
#1
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Guys & Gals,
Long time reader of this forum, but firstime poster.
Thank you in advance for assisting me through the process. What I have in a 1999 XK8. Yesterday at startup, the engine ran normal for about 5 seconds then begun misfiring. The reduced performance light came on including the check engine light. I shut off the car and restarted it with the same results. The issue is interment. I drove it around the block and one minute its fine then back to misfiring. The following codes were observed.
P0302 – Misfire Detected, cyl 3
P1313 – Misfire Rate catalyst damage, right-hand bank.
P1316 – Misfire excess emission
P0352 - Ignition coil primary/secondary circuit malfunction, cyl 3
P0353 - Ignition coil primary/secondary circuit malfunction, cyl 5
P0355 - Ignition coil primary/secondary circuit malfunction, cyl 2
Thoughts? ECM? Other Censor?
Secondary question, was the two Ignition Modules (Denso LJA1450AF) from the AJ26 eliminated and added the ECM on the AJ27?
Long time reader of this forum, but firstime poster.
Thank you in advance for assisting me through the process. What I have in a 1999 XK8. Yesterday at startup, the engine ran normal for about 5 seconds then begun misfiring. The reduced performance light came on including the check engine light. I shut off the car and restarted it with the same results. The issue is interment. I drove it around the block and one minute its fine then back to misfiring. The following codes were observed.
P0302 – Misfire Detected, cyl 3
P1313 – Misfire Rate catalyst damage, right-hand bank.
P1316 – Misfire excess emission
P0352 - Ignition coil primary/secondary circuit malfunction, cyl 3
P0353 - Ignition coil primary/secondary circuit malfunction, cyl 5
P0355 - Ignition coil primary/secondary circuit malfunction, cyl 2
Thoughts? ECM? Other Censor?
Secondary question, was the two Ignition Modules (Denso LJA1450AF) from the AJ26 eliminated and added the ECM on the AJ27?
#2
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Disconnect the coil pack for B4 (cylinder #8) or;
Swop the B4 coil across to the same position on the other bank.
Clear the codes, restart the motor and then re-read codes
Post back what you see.
Yes.
Swop the B4 coil across to the same position on the other bank.
Clear the codes, restart the motor and then re-read codes
Post back what you see.
Yes.
Last edited by michaelh; 05-06-2024 at 04:24 PM.
#3
#4
![Default](/forum/images/icons/icon1.gif)
Guys & Gals,
Long time reader of this forum, but firstime poster.
Thank you in advance for assisting me through the process. What I have in a 1999 XK8. Yesterday at startup, the engine ran normal for about 5 seconds then begun misfiring. The reduced performance light came on including the check engine light. I shut off the car and restarted it with the same results. The issue is interment. I drove it around the block and one minute its fine then back to misfiring. The following codes were observed.
P0302 – Misfire Detected, cyl 3
P1313 – Misfire Rate catalyst damage, right-hand bank.
P1316 – Misfire excess emission
P0352 - Ignition coil primary/secondary circuit malfunction, cyl 3
P0353 - Ignition coil primary/secondary circuit malfunction, cyl 5
P0355 - Ignition coil primary/secondary circuit malfunction, cyl 2
Thoughts? ECM? Other Censor?
Secondary question, was the two Ignition Modules (Denso LJA1450AF) from the AJ26 eliminated and added the ECM on the AJ27?
Long time reader of this forum, but firstime poster.
Thank you in advance for assisting me through the process. What I have in a 1999 XK8. Yesterday at startup, the engine ran normal for about 5 seconds then begun misfiring. The reduced performance light came on including the check engine light. I shut off the car and restarted it with the same results. The issue is interment. I drove it around the block and one minute its fine then back to misfiring. The following codes were observed.
P0302 – Misfire Detected, cyl 3
P1313 – Misfire Rate catalyst damage, right-hand bank.
P1316 – Misfire excess emission
P0352 - Ignition coil primary/secondary circuit malfunction, cyl 3
P0353 - Ignition coil primary/secondary circuit malfunction, cyl 5
P0355 - Ignition coil primary/secondary circuit malfunction, cyl 2
Thoughts? ECM? Other Censor?
Secondary question, was the two Ignition Modules (Denso LJA1450AF) from the AJ26 eliminated and added the ECM on the AJ27?
0352-A2, 0353-A3,0355-B1 (this may just be alternate cylinder numbering though)
but regardless l think you should have AJ27 so coil modules are built into each coil.
I did have similar problem a few years ago when one coil failed due to feedback circuit short to ground, that will cause a misfire on all 4 cylinders in that group. One new coil fixed it.
Last edited by baxtor; 05-07-2024 at 12:14 AM.
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michaelh (05-07-2024)
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