interesting 22re miss.
12-27-2007, 12:24 AM
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interesting 22re miss.
driving down the highway today at around 70ish, 2800-3000 rpms and the check engine light turns off, randomly and when it does the truck misses, it comes back on and the truck misses. puzzled me abit.
on the way home the truck missed about every 30 seconds, it was a quick miss, i'm thinking it wasn't getting spark because it would make a backfire noise after it would miss.
can anyone point me in the right direction.
truck is missing the knock sensor, could this have anything to do with it.
on the way home the truck missed about every 30 seconds, it was a quick miss, i'm thinking it wasn't getting spark because it would make a backfire noise after it would miss.
can anyone point me in the right direction.
truck is missing the knock sensor, could this have anything to do with it.
12-27-2007, 07:09 AM
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If there's no knock sensor, that's likely to be the cause for the CEL. Plus, you have big hole = vacuum leak that needs to be plugged up right in the manifold. If it's just the wire missing, you'll need to fix it. In either case, the ignition timing is going to be affected and either could be (and probably is) causing the backfiring.
There are two types of backfiring. One is from the exhaust manifold and the other is back up through the intake. Neither are good, but the second is very serious.
There are two types of backfiring. One is from the exhaust manifold and the other is back up through the intake. Neither are good, but the second is very serious.
12-27-2007, 07:50 AM
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bye bye cherokee!
12-27-2007, 10:38 AM
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If there's no knock sensor, that's likely to be the cause for the CEL. Plus, you have big hole = vacuum leak that needs to be plugged up right in the manifold. If it's just the wire missing, you'll need to fix it. In either case, the ignition timing is going to be affected and either could be (and probably is) causing the backfiring.
There are two types of backfiring. One is from the exhaust manifold and the other is back up through the intake. Neither are good, but the second is very serious.
There are two types of backfiring. One is from the exhaust manifold and the other is back up through the intake. Neither are good, but the second is very serious.
knock sensor threads into the side of the block.
12-27-2007, 11:11 AM
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driving down the highway today at around 70ish, 2800-3000 rpms and the check engine light turns off, randomly and when it does the truck misses, it comes back on and the truck misses. puzzled me abit.
Clarification; the CEL light is on at all times; and went out when it misfired?
on the way home the truck missed about every 30 seconds, it was a quick miss, i'm thinking it wasn't getting spark because it would make a backfire noise after it would miss.
truck is missing the knock sensor, could this have anything to do with it?
I may be mistaken; but will a missing Knock Sensor keep the ignition timing retarded and in open loop?
Anyway; my guess: A cool high humidity day and you were under load. Moustier in the cap; causing a cross spark.
Clarification; the CEL light is on at all times; and went out when it misfired?
on the way home the truck missed about every 30 seconds, it was a quick miss, i'm thinking it wasn't getting spark because it would make a backfire noise after it would miss.
truck is missing the knock sensor, could this have anything to do with it?
I may be mistaken; but will a missing Knock Sensor keep the ignition timing retarded and in open loop?
Anyway; my guess: A cool high humidity day and you were under load. Moustier in the cap; causing a cross spark.
12-27-2007, 11:16 AM
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driving down the highway today at around 70ish, 2800-3000 rpms and the check engine light turns off, randomly and when it does the truck misses, it comes back on and the truck misses. puzzled me abit.
Clarification; the CEL light is on at all times; and went out when it misfired?
on the way home the truck missed about every 30 seconds, it was a quick miss, i'm thinking it wasn't getting spark because it would make a backfire noise after it would miss.
truck is missing the knock sensor, could this have anything to do with it?
I may be mistaken; but will a missing Knock Sensor keep the ignition timing retarded and in open loop?
Anyway; my guess: A cool high humidity day and you were under load. Moustier in the cap; causing a cross spark.
Clarification; the CEL light is on at all times; and went out when it misfired?
on the way home the truck missed about every 30 seconds, it was a quick miss, i'm thinking it wasn't getting spark because it would make a backfire noise after it would miss.
truck is missing the knock sensor, could this have anything to do with it?
I may be mistaken; but will a missing Knock Sensor keep the ignition timing retarded and in open loop?
Anyway; my guess: A cool high humidity day and you were under load. Moustier in the cap; causing a cross spark.
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