Hey there guys, been a while, but here I am with some gremlins.
So the other day I had about 1/4 tank of gas left, went and filled it up at a station I dont normally go to.. Go to work on monday, get there and back no problem. Start up on monday, get a weird idle. Drive to work, have to pull over cuz it got really bad, like shaking bad. Use my Blue Driver as soon as I start seeing a flashing CEL. It tells me p0300 random misfire. Just started this job so I need to go in for it, the CEL goes away on start up and evens out. Next morning, same things, The CEL comes on for a brief few, then goes out, no further bad idle or misfires, it basically would come on flash for a few, would have some bad idle, and then would eventually go away within a few minutes of driving (yes I know it is bad to drive with a flashing CEL misfire, but I have no other choice and I dont get first paycheck until Next month) -
I was thinking since it basically goes away and stays away for a while that I might have picked up bad gas, So i put a can of seafoam in tank and filled it with gas from a known good place (tank was half full before filling). The issue went away for a day. I was thinking maybe its just a cold morning thing, but it has warmed up and it suddenly started doing it during the afternoon. Drove it from Boise to Nampa, about 15 miles with the CEL giving me grief and just saying P0300 pending. and as soon as I get home to start more testing, the misfire and CEL goes away.
The code is always a pending, but it doesnt stick around. Only once has it given a definitive code of P0302.
Im broke at the moment so cant throw money at it.
What I have done so far is, run cleaner through thinking it was a fuel issue, got more gas at different station.
I checked lines for vacuum leak, not seeing anything.
Pulled intake box off, its clean.
Didnt touch TB, its a little dirty, but not that bad.
I checked some of the spark plugs, they look normal. I think I changed them out around 110K, we have 160k on it now.
Checked coil packs for cylinder 2 and 3 since I did get that one brief pending misfire in cylinder 2 code (that went away after like 60 seconds).
I swapped the spark plug and coil packs from 2 to 3, to see if I would get a cylinder 3 misfire code to show it was one of those, but I have only gotten p0300 pending since then.
it is just so random when it does it and for how long it does it.
I dont have a lot of tools to check stuff, nor money to buy said tools. I have $500 at it has to last me another 3 weeks.
When I was running the scanner I was doing live feed as well.
O2 sensors are operating as normal.
I am still using more fuel than normal cuz the estimated mpg is low.
The hg of intake manifold ranges from 7-25. When it was bad idle and miss it was about 10, and when it went away i was sitting about 9 but dont think tha tmeans much. I dont recall what the average is supposed to be.
I did pull the MAP sensor and cleaned it, gave it a good spraying, as soon as I did it gave me a p0107 circuit low, probably just cuz I pulled it off.
I dont know guys, gremlins hitting at the worst of times.
So the other day I had about 1/4 tank of gas left, went and filled it up at a station I dont normally go to.. Go to work on monday, get there and back no problem. Start up on monday, get a weird idle. Drive to work, have to pull over cuz it got really bad, like shaking bad. Use my Blue Driver as soon as I start seeing a flashing CEL. It tells me p0300 random misfire. Just started this job so I need to go in for it, the CEL goes away on start up and evens out. Next morning, same things, The CEL comes on for a brief few, then goes out, no further bad idle or misfires, it basically would come on flash for a few, would have some bad idle, and then would eventually go away within a few minutes of driving (yes I know it is bad to drive with a flashing CEL misfire, but I have no other choice and I dont get first paycheck until Next month) -
I was thinking since it basically goes away and stays away for a while that I might have picked up bad gas, So i put a can of seafoam in tank and filled it with gas from a known good place (tank was half full before filling). The issue went away for a day. I was thinking maybe its just a cold morning thing, but it has warmed up and it suddenly started doing it during the afternoon. Drove it from Boise to Nampa, about 15 miles with the CEL giving me grief and just saying P0300 pending. and as soon as I get home to start more testing, the misfire and CEL goes away.
The code is always a pending, but it doesnt stick around. Only once has it given a definitive code of P0302.
Im broke at the moment so cant throw money at it.
What I have done so far is, run cleaner through thinking it was a fuel issue, got more gas at different station.
I checked lines for vacuum leak, not seeing anything.
Pulled intake box off, its clean.
Didnt touch TB, its a little dirty, but not that bad.
I checked some of the spark plugs, they look normal. I think I changed them out around 110K, we have 160k on it now.
Checked coil packs for cylinder 2 and 3 since I did get that one brief pending misfire in cylinder 2 code (that went away after like 60 seconds).
I swapped the spark plug and coil packs from 2 to 3, to see if I would get a cylinder 3 misfire code to show it was one of those, but I have only gotten p0300 pending since then.
it is just so random when it does it and for how long it does it.
I dont have a lot of tools to check stuff, nor money to buy said tools. I have $500 at it has to last me another 3 weeks.
When I was running the scanner I was doing live feed as well.
O2 sensors are operating as normal.
I am still using more fuel than normal cuz the estimated mpg is low.
The hg of intake manifold ranges from 7-25. When it was bad idle and miss it was about 10, and when it went away i was sitting about 9 but dont think tha tmeans much. I dont recall what the average is supposed to be.
I did pull the MAP sensor and cleaned it, gave it a good spraying, as soon as I did it gave me a p0107 circuit low, probably just cuz I pulled it off.
I dont know guys, gremlins hitting at the worst of times.
