Car has issues after that heavy rain we had
04-05-2012, 11:29 PM
#1
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Car has issues after that heavy rain we had I had to drive home in that really heavy rain a couple days ago, was just fine on the way home and when I parked it.
Next day it died in reverse on me, and tried to die when I took off normally from a stop sign. Car will hardly accelerate unless I have it 3/4 or more of the way down, and it takes off hard, it just stumbles and misses really bad in mid range.
If I hold the gas constant at a normal amount, it stumbles and all of a sudden takes off hard.
Air filter was damp, lots of gas in the intake manifold it looks like, seems to be running a lot richer than usual. Plugs and wires look good. MAF "looks" good, also runs the same without the MAF. O2s look fine, didn't try running it without them.
Car has longtubes and no emissions stuff (AIR/EGR, Cats, etc.) and on stock tune. Has always run rich but no issues.
Limped it to vatozone and got the usual above codes along with random missfires, real helpful.
Maybe one of the coils has gone bad?
Anyone have any ideas?
Anyone local that I can try swapping coil packs with to see if that clears up the problem?
Next day it died in reverse on me, and tried to die when I took off normally from a stop sign. Car will hardly accelerate unless I have it 3/4 or more of the way down, and it takes off hard, it just stumbles and misses really bad in mid range.
If I hold the gas constant at a normal amount, it stumbles and all of a sudden takes off hard.
Air filter was damp, lots of gas in the intake manifold it looks like, seems to be running a lot richer than usual. Plugs and wires look good. MAF "looks" good, also runs the same without the MAF. O2s look fine, didn't try running it without them.
Car has longtubes and no emissions stuff (AIR/EGR, Cats, etc.) and on stock tune. Has always run rich but no issues.
Limped it to vatozone and got the usual above codes along with random missfires, real helpful.
Maybe one of the coils has gone bad?
Anyone have any ideas?
Anyone local that I can try swapping coil packs with to see if that clears up the problem?
04-06-2012, 08:31 AM
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one time i went through a deep puddle and got misfires for days afterwards. i have LT's with o2 extensions, and i guess the o2 connectors didnt seal that well and got water in them. i sprayed out the connectors with 'electronics parts cleaner' (available at any auto parts store) and let it dry overnight before re-connecting. that did it.
http://www.amazon.com/dp/B000CCMLD0/...hvptwo=&hvqmt=
http://www.amazon.com/dp/B000CCMLD0/...hvptwo=&hvqmt=
04-06-2012, 09:50 AM
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I had to drive home in that really heavy rain a couple days ago, was just fine on the way home and when I parked it.
Next day it died in reverse on me, and tried to die when I took off normally from a stop sign. Car will hardly accelerate unless I have it 3/4 or more of the way down, and it takes off hard, it just stumbles and misses really bad in mid range.
If I hold the gas constant at a normal amount, it stumbles and all of a sudden takes off hard.
Air filter was damp, lots of gas in the intake manifold it looks like, seems to be running a lot richer than usual. Plugs and wires look good. MAF "looks" good, also runs the same without the MAF. O2s look fine, didn't try running it without them.
Car has longtubes and no emissions stuff (AIR/EGR, Cats, etc.) and on stock tune. Has always run rich but no issues.
Limped it to vatozone and got the usual above codes along with random missfires, real helpful.
Maybe one of the coils has gone bad?
Anyone have any ideas?
Anyone local that I can try swapping coil packs with to see if that clears up the problem?
Next day it died in reverse on me, and tried to die when I took off normally from a stop sign. Car will hardly accelerate unless I have it 3/4 or more of the way down, and it takes off hard, it just stumbles and misses really bad in mid range.
If I hold the gas constant at a normal amount, it stumbles and all of a sudden takes off hard.
Air filter was damp, lots of gas in the intake manifold it looks like, seems to be running a lot richer than usual. Plugs and wires look good. MAF "looks" good, also runs the same without the MAF. O2s look fine, didn't try running it without them.
Car has longtubes and no emissions stuff (AIR/EGR, Cats, etc.) and on stock tune. Has always run rich but no issues.
Limped it to vatozone and got the usual above codes along with random missfires, real helpful.
Maybe one of the coils has gone bad?
Anyone have any ideas?
Anyone local that I can try swapping coil packs with to see if that clears up the problem?
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04-06-2012, 11:42 AM
#9
Hate to say it, 5w20 is right. You have been sabotaging your car slowly since you did this. You need a tune, replace your O2s, and re-look this deal to rule some things out. The truth is, if your air filter was wet, I don't like your odds. Air filters are shitty at stopping water...
04-06-2012, 11:57 AM
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Dunno, I've heard tons on tons of people running !emissions and LTs on stock tune with no issues, my LT1 did it for MUCH longer, also ran very strong.
I'm just going off what I hear, and always heard a tune would help, but wasn't needed.
I'm thinking its more of a coil since it runs the same with MAF unplugged and O2s unplugged, shouldn't it run in open loop or whatever where it ignores the sensor readings if they're unplugged? All connectors look fine and its been sitting for a few days.
Pulled a few of the mini fuses and they looked fine, have to leave for work so I'll check the rest later.
Keep the ideas coming guys, its appreciated.
I'm just going off what I hear, and always heard a tune would help, but wasn't needed.
I'm thinking its more of a coil since it runs the same with MAF unplugged and O2s unplugged, shouldn't it run in open loop or whatever where it ignores the sensor readings if they're unplugged? All connectors look fine and its been sitting for a few days.
Pulled a few of the mini fuses and they looked fine, have to leave for work so I'll check the rest later.
Keep the ideas coming guys, its appreciated.
04-06-2012, 01:39 PM
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The car will run rough without the MAF which is the same as having a MAF in there that isn't working. You need to try swapping someone else's MAF on there as this WILL cause your car to run rough and die until it gets warmed up. If you can get the car to idle with the MAF trying hitting it with a screw driver and see if it dies (just a thought).
04-06-2012, 03:24 PM
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The car will run rough without the MAF which is the same as having a MAF in there that isn't working. You need to try swapping someone else's MAF on there as this WILL cause your car to run rough and die until it gets warmed up. If you can get the car to idle with the MAF trying hitting it with a screw driver and see if it dies (just a thought).
they'll dry out..
04-06-2012, 06:00 PM
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Yea after thinking about it today its gotta be MAF unless the coil got wet as well.
Anyone in McKinney area willing to swap MAFs for a minute?
Not sure if I would be able to return it after trying it out.
Anyone in McKinney area willing to swap MAFs for a minute?
Not sure if I would be able to return it after trying it out.
04-07-2012, 03:51 PM
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I'd say take a air gun and hit the intake around the injector bossing but since it's been a couple days it should of dried. A friend had this happen where water puddled around the injectors and ran like **** hit it with the air gun blew it all out and was fine. He pressure washed his engine though IIRC.
