It is always worthwhile to take a look in the How-to guides and tips
Both spark plug and ignition coil service procedures can be found there.
Willy
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It is always worthwhile to take a look in the How-to guides and tips
Both spark plug and ignition coil service procedures can be found there.
Willy
144 GL (1974)--->244 GL (1982)--->940 GLE 2.3i (1992)--->XC70 2.5T (2004)--->XC90 T5 (2018)
Hi everybody,
I have cylinder 5 misfire (P0305). First thing I'd like to do is replace the ignition coil. Is cylinder 5 on the left or right when facing the engine? (sorry for a silly question)
Thanks.
Hey, some of the earlier photos are not showing up. Can those of you who posted them please refresh the links?
Oh, the reason I found this thread is the wife called, freaking out. She said the car check engine light not only went on, but was flashing! She was able to pull over to a parking lot and have her mother come get her. I thought for sure the timing belt went, but now I don't think so, as the engine is still running, though roughly. First, is this an "interference" engine (for valves when the timing belt fails)? Second, she limped it home maybe 2-3 miles, and it runs rough.
My thought is that it ran real rough as the coil was failing, and firing out of sequence, and now is just running "plain old rough", since there is likely no spark. Does this sound like a reasonable guess to you? How does one diagnose this? Will an engine scanning tool pick up this specific of a thing on a 2001? I really don't want to start dumping money into parts willy nilly; especially on this old pig.
1. It is an interference engine.
2. You can learn a lot having the codes read with an OBDII scanner.
Bill
63 PV544 (attempted restoration)
83 245 DL OSD (transferred to son)
85 240 GL OSD (transferred to son)
03 XC70 OSD (traded-in 4/12)
05 AWD S80 OSD (transferred to son)
12 XC70 T6
16 S60 T5 Drive-E (FWD)
So, being an interference engine, and the fact she limped it home, we're safe there. Also since it is rough even in PARK, it isn't transmission related.
Right so far?
So, what are the exact symptoms of a coil failure?
The fact that it runs at all means that the timing belt is intact...had it broken, she would not have driven it, she would have heard a horrible noise, followed by an engine that refused to run...followed by your call to the junkyard to come tow it away...
Running rough like it does is a classic coil failure symptom - you've got a misfire on one cylinder, the car knows it, that's why the CEL is on...could be an injector, or other cause, but the coil is most likely...
Many auto parts shops will plug in an OBD-II reader for free and pull the code, if I recall correctly, it's 030X for a misfire, with X being the cylinder at fault. An OBD-II reader is about $50 for one that just does the generic codes...
Swap coils from the bad cylinder to any other cylinder, if the code changes to that cylinder with which you did the swap, then you've found your problem.
Current Fleet:
2016 Tundra Crewmax 4WD 1794
2005 MB S600 (130K, Michelin AS4, HPL 0W40)
2005 MB SL600 (58K Michelin AS4, Mobil 1 0W40)
2004 V70R (147K, six speed M66, HPL 5W40)
2004 XC90 (247K, HPL 0W30 Euro)
2002 V70-XC (300K, HPL 0W30 Euro)
2002 V70-T5 (230K, IPD bars, Bilsteins)
2001 V70-T5 (125K, IPD downpipe, cat back and other mods)
1932 Packard Sedan (straight 8, dual sidemounts, original paint and interior, Shell Rotella 15W40)
Just my .02 I would replace all five coils. When I did mine they all failed one after another. If the coils are the problem.
in order
1. Yes
2. No
It's an easy swap...
Current Fleet:
2016 Tundra Crewmax 4WD 1794
2005 MB S600 (130K, Michelin AS4, HPL 0W40)
2005 MB SL600 (58K Michelin AS4, Mobil 1 0W40)
2004 V70R (147K, six speed M66, HPL 5W40)
2004 XC90 (247K, HPL 0W30 Euro)
2002 V70-XC (300K, HPL 0W30 Euro)
2002 V70-T5 (230K, IPD bars, Bilsteins)
2001 V70-T5 (125K, IPD downpipe, cat back and other mods)
1932 Packard Sedan (straight 8, dual sidemounts, original paint and interior, Shell Rotella 15W40)
Well, I did this, and when testing, it ran extremely rough, and threw another code for an Audi. I think it was 1284 or something like that. I think the diagnosis was a fuel pump #2 or something. I thought about it, and reconnected the air intake tube, and it pretty much cleared up the problems. I think being a turbo, that needs to be in place, but was never mentioned here or in the directions. Anyone doing this in the future, remember to reconnect the air tube first.
Oh, and all my wiring sheathing is crumbling. The entire top of the motor when I took off the plastic coil cover was full of little bits of plastic. This is VERY worrisome. Also, I snapped off one of the plastic clips which hold the wire/plug onto the coil. I think I am just going to use some steel fishing wire to wrap it in place. This car is turning out to be a real P.O.S. in the end. Nice looking, nice riding, but it is beyond its time and was grossly underengineered.
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