I am getting a misfire in one of the cylinders under high boost, how long should an oem distributor rotor last, mine was done 20k miles ago, shouldn't they last longer than that? no starting issues at all. I am thinking it may be my wires, they have been in there for about 40k and i can see a piece of bare wire on one of them but i cannot see any arcing at night.
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Misfire..
Started by volvos70turbo99, Jan 30 2012 01:15 AM
21 replies to this topic
#1
volvos70turbo99
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Posted 30 January 2012 - 01:15 AM
1998 s70 glt t5 converted - 16t, white injectors, nxs mbc @ 14psi, k&n drop in filter, high flow cat, full 3in. exhaust, dp, hd wg, na tb, ipd turbo hoses, ard orange tune, stage 0 complete
#2
boxpin
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Posted 30 January 2012 - 01:17 AM
I would put plugs at the top of the list. There is much debate about them but most would agree that OEM is the best. Try a smaller gap like .026
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#3
volvos70turbo99
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Posted 30 January 2012 - 01:42 AM
plugs were replaced 8k miles ago with oem, they were gapped at .030 when i got them and left them at that, ill try .026 , never seems to help my misfire issues when i do this though.
1998 s70 glt t5 converted - 16t, white injectors, nxs mbc @ 14psi, k&n drop in filter, high flow cat, full 3in. exhaust, dp, hd wg, na tb, ipd turbo hoses, ard orange tune, stage 0 complete
#4
Jazzy_J
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Posted 30 January 2012 - 01:44 AM
.30 to big, go .28 and you should really consider replacing the wires.
- 98' V70 T5 w/ MSD, Snabb, K&N, OBX, 960 TB, IPD Springs, Bilstien HD Rear/Touring Front.
#5
volvos70turbo99
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Posted 30 January 2012 - 01:47 AM
gotcha, i wont break the tip trying to lower the gap will i, because they have those really thin tips on them?
1998 s70 glt t5 converted - 16t, white injectors, nxs mbc @ 14psi, k&n drop in filter, high flow cat, full 3in. exhaust, dp, hd wg, na tb, ipd turbo hoses, ard orange tune, stage 0 complete
#6
Jazzy_J
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Posted 30 January 2012 - 01:49 AM
if you use a proper gapping tool then no worries about the tip. its stronger then it looks.
You siad they were OEM plugs? Those come pregapped for the specific engines. The factory gap on a T5 is .28
You siad they were OEM plugs? Those come pregapped for the specific engines. The factory gap on a T5 is .28
- 98' V70 T5 w/ MSD, Snabb, K&N, OBX, 960 TB, IPD Springs, Bilstien HD Rear/Touring Front.
#7
volvos70turbo99
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Posted 30 January 2012 - 02:01 AM
well i have a glt with all the t5 stuff and more, but they did come at .030 because i checked them with a gapper but i just threw them in, maybe that is the gap for glts? I'm not sure.
1998 s70 glt t5 converted - 16t, white injectors, nxs mbc @ 14psi, k&n drop in filter, high flow cat, full 3in. exhaust, dp, hd wg, na tb, ipd turbo hoses, ard orange tune, stage 0 complete
#8
Jazzy_J
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Posted 30 January 2012 - 02:10 AM
So you are running a T5 engine right?
Are you still running the GLT ECU? that wont keep up with the HPT on a T5, that will cause a misfire.
If you are using a T5 block then you should use the T5 spark gap (.28).
Are you still running the GLT ECU? that wont keep up with the HPT on a T5, that will cause a misfire.
If you are using a T5 block then you should use the T5 spark gap (.28).
- 98' V70 T5 w/ MSD, Snabb, K&N, OBX, 960 TB, IPD Springs, Bilstien HD Rear/Touring Front.
#9
volvos70turbo99
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Posted 30 January 2012 - 02:24 AM
no glt motor, 2.4, but t5 ecu, 16t and 14 psi.
1998 s70 glt t5 converted - 16t, white injectors, nxs mbc @ 14psi, k&n drop in filter, high flow cat, full 3in. exhaust, dp, hd wg, na tb, ipd turbo hoses, ard orange tune, stage 0 complete
#10
volvos70turbo99
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Posted 30 January 2012 - 02:45 AM
should i still lower the gap?
1998 s70 glt t5 converted - 16t, white injectors, nxs mbc @ 14psi, k&n drop in filter, high flow cat, full 3in. exhaust, dp, hd wg, na tb, ipd turbo hoses, ard orange tune, stage 0 complete
#11
volvos70turbo99
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Posted 30 January 2012 - 03:49 AM
actually the stock gap on turbos is .030, so im guessing it needs to be .026-.028 for running higher boost.
1998 s70 glt t5 converted - 16t, white injectors, nxs mbc @ 14psi, k&n drop in filter, high flow cat, full 3in. exhaust, dp, hd wg, na tb, ipd turbo hoses, ard orange tune, stage 0 complete
#12
Jazzy_J
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Posted 30 January 2012 - 01:27 PM
The gap for the GLT is .30, since your running a GLT with a T5 ECU im not sure if you should lower the gap or now.
- 98' V70 T5 w/ MSD, Snabb, K&N, OBX, 960 TB, IPD Springs, Bilstien HD Rear/Touring Front.
#13
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Posted 30 January 2012 - 03:14 PM
If you have a bare wire you should change that set out...
On the gap, run as wide as you can without geting misfires after you sort out the other hardware issues ^.
On the gap, run as wide as you can without geting misfires after you sort out the other hardware issues ^.
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#14
volvos70turbo99
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Posted 30 January 2012 - 08:49 PM
ok update on the plugs, regapped them to .028 same issue, was getting a p0305, swapped cyl 5 plug with cyl. 2, now its p0302, so plug is bad, how is this possible , plug is a grayish color, just changed them 8k miles ago, they are volvo oem. I don't drive the crap out of my car and feel like i change plugs constantly, with champion coppers i get maybe 5k out of them.
1998 s70 glt t5 converted - 16t, white injectors, nxs mbc @ 14psi, k&n drop in filter, high flow cat, full 3in. exhaust, dp, hd wg, na tb, ipd turbo hoses, ard orange tune, stage 0 complete
#15
volvos70turbo99
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Posted 30 January 2012 - 08:55 PM
i just read somewhere changing oils to a different type could put deposits on the plug that could cause misfires, i have changed oils a lot , 10w, then to 15w, ive had synthetic, high mileage, regular oil?
1998 s70 glt t5 converted - 16t, white injectors, nxs mbc @ 14psi, k&n drop in filter, high flow cat, full 3in. exhaust, dp, hd wg, na tb, ipd turbo hoses, ard orange tune, stage 0 complete
#16
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Posted 30 January 2012 - 10:49 PM
Oil really shouldnt make a difference. If tou have oil on the plugs you may want to replace the oil filler cap seal.
But now you know its the wires and you should get those replaced.
But now you know its the wires and you should get those replaced.
- 98' V70 T5 w/ MSD, Snabb, K&N, OBX, 960 TB, IPD Springs, Bilstien HD Rear/Touring Front.
#17
erikv11
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Posted 30 January 2012 - 11:14 PM
Agreed he should replace the wires soon but why does he know it's the wires? Sounds like he knows it is the plugs, well one bad plug anyway.
If there is oil on the plugs it may be bad valve stem seals, remember they are very common. But grayish doesn't sound like oil, I'm talking like crusty deposits.
If there is oil on the plugs it may be bad valve stem seals, remember they are very common. But grayish doesn't sound like oil, I'm talking like crusty deposits.
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#18
Jazzy_J
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Posted 31 January 2012 - 12:13 AM
oops i thought he said he moved the wire...but he moved the plug. my bad.
to correct myself replace the plugs.......
to correct myself replace the plugs.......
- 98' V70 T5 w/ MSD, Snabb, K&N, OBX, 960 TB, IPD Springs, Bilstien HD Rear/Touring Front.
#19
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Posted 31 January 2012 - 01:10 AM
is there any reason why plugs would be gapped higher than .030? i just replaced all of mine and the ones i pulled were .044
#20
volvos70turbo99
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Posted 31 January 2012 - 01:24 AM
Yea the seal is fine and there was a little oil on them only on threads would that f them up
1998 s70 glt t5 converted - 16t, white injectors, nxs mbc @ 14psi, k&n drop in filter, high flow cat, full 3in. exhaust, dp, hd wg, na tb, ipd turbo hoses, ard orange tune, stage 0 complete
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