Engine Backfire Diagnosis Led to Wiped cam Lobes
- Thread starter Skweegle89
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Skweegle89
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- Truck Year
- 1985
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- Engine Size
- 350
85swb "Fancy"
Nope. Switched to that thick fel pro gasket.
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Nope. Switched to that thick fel pro gasket.
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Skweegle89
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85swb "Fancy"
Pcv is ported. Vac advance in manifold. Brake booster is manifold. Everything else is plugged.
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Pcv is ported. Vac advance in manifold. Brake booster is manifold. Everything else is plugged.
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Skweegle89
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85swb "Fancy"
I had the pcv on the top port. Just moved it to the bottom and the damn thing runs fine at the moment. That's ridiculous. I have swapped those vac lines around 100 times and never got anything to change. Just drove it around town and it ran alright. It will backfire if I'm going up a hill in a higher gear though. Any idea how to get rid of that?
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I had the pcv on the top port. Just moved it to the bottom and the damn thing runs fine at the moment. That's ridiculous. I have swapped those vac lines around 100 times and never got anything to change. Just drove it around town and it ran alright. It will backfire if I'm going up a hill in a higher gear though. Any idea how to get rid of that?
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350runner
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Understand that top port is an overflow secondary vent for gas... originally it went to the evap canister, so if a person was to leave a vac line connected to it via crank case... bad things would happen. Backfire where carb or exhaust.
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350runner
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Troubleshooting - backfire through carburetor: http://youtu.be/M92CGjpiMs4
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Skweegle89
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85swb "Fancy"
It will backfire through the exhaust but the only time it would do it is if I accelerate hard in a higher gear. Like going up a hill in 4th.
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It will backfire through the exhaust but the only time it would do it is if I accelerate hard in a higher gear. Like going up a hill in 4th.
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350runner
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Why Cars Backfire - Afterfire - Explained: http://youtu.be/bgS3PA5r0vY
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Skweegle89
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85swb "Fancy"
That's not good. That would explain why my oil smells a bit like gas and although I have a couple small oil leaks, oil still reads full. I will drain it and change it before I run it anywhere else. I can help but think a large amount of fuel went in the crank case when fuel kept spilling out the top of the carb.
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That's not good. That would explain why my oil smells a bit like gas and although I have a couple small oil leaks, oil still reads full. I will drain it and change it before I run it anywhere else. I can help but think a large amount of fuel went in the crank case when fuel kept spilling out the top of the carb.
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Skweegle89
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85swb "Fancy"
This has got me paranoid now. I hope it didn't do any internal damage.
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This has got me paranoid now. I hope it didn't do any internal damage.
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350runner
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Well man that's why I stressed you not hook up anything to that port weeks ago. I hope it will be ok tho. You haven't been riding around for that long.
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Skweegle89
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85swb "Fancy"
I just went about 6 blocks with it. Other than that it's just been starting and immediately dying. I will drain it all tomorrow and put new oil in it.
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I just went about 6 blocks with it. Other than that it's just been starting and immediately dying. I will drain it all tomorrow and put new oil in it.
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