Faulty coil testing?
#1
Faulty coil testing?
Hello everybody;
I have an intermittent misfire on a few cylinders, but not very often and quite random (I've seen 1,2,3,4 and I think 8 of various occasions). the car is idling rough and occasionally stalls. I don't think its the fuel pump or injectors (both serviced/swapped to no effect) and nice new sparks did not solve the problem.
Could it be faulty coils? Any way to test them (other than swapping around)?
Note: the kitty is due for timing belt swap/upgrade (next month methinks) could this be the cause of misfires and rough idles?
Any thoughts much appreciated.
I have an intermittent misfire on a few cylinders, but not very often and quite random (I've seen 1,2,3,4 and I think 8 of various occasions). the car is idling rough and occasionally stalls. I don't think its the fuel pump or injectors (both serviced/swapped to no effect) and nice new sparks did not solve the problem.
Could it be faulty coils? Any way to test them (other than swapping around)?
Note: the kitty is due for timing belt swap/upgrade (next month methinks) could this be the cause of misfires and rough idles?
Any thoughts much appreciated.
#2
I have an intermittent misfire on a few cylinders, but not very often and quite random (I've seen 1,2,3,4 and I think 8 of various occasions). the car is idling rough and occasionally stalls.
Note: the kitty is due for timing belt swap/upgrade (next month methinks) could this be the cause of misfires and rough idles?
Note: the kitty is due for timing belt swap/upgrade (next month methinks) could this be the cause of misfires and rough idles?
Your car doesn't have a timing belt but does potentially have timing chain tensioners that have a terrible history of failing and destroying engines. Jump one tooth you get misfires and rough idle, jump two teeth you bend one or more valves and replace the engine.
I say potentially becaues '02s were supposed to have the upgraded metal tensioners but not all did. Mine did not.
I would not start the car again, not even once, not even to take it for repair, before removing the right valve cover for a look.
After that is verified/resolved the standard method of testing coils is to swap them around.
Last edited by test point; 07-03-2013 at 03:16 AM.
#3
I agree that you should take the precaution Test Point has suggested.
If you do determine that the tensioners are OK, then reset the codes once you have a warm engine. Then restart the engine and check immediately to see which cylinder misfire(s) occurs first. The first one or two to register are usually the culprit in a multiple misfire situation.
If you do determine that the tensioners are OK, then reset the codes once you have a warm engine. Then restart the engine and check immediately to see which cylinder misfire(s) occurs first. The first one or two to register are usually the culprit in a multiple misfire situation.
Thread
Thread Starter
Forum
Replies
Last Post
scooternva
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
20
09-27-2023 11:25 AM
34by151
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
4
09-06-2015 05:14 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)