# would bad gas foul a plug?
**URL:** https://forums.speedlife.net/t/would-bad-gas-foul-a-plug/18879
**Category:** NYSpeed Automotive
**Created:** [October 16, 2006, 7:41am UTC](https://forums.speedlife.net/t/would-bad-gas-foul-a-plug/18879 "2006-10-16T07:41:07Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@JustinH](https://forums.speedlife.net/u/JustinH)
#### Post date: [October 16, 2006, 7:41am UTC](https://forums.speedlife.net/t/would-bad-gas-foul-a-plug/18879/1 "2006-10-16T07:41:07Z")
I did something stupid, I bought gas at the indian reservation, and I think I got some bad gas in the 98 4.6 f150.
The seneca hawk on rt 5 in irving.
We had to go there, most everything was closed or lines out the road.
It was sputtering really bad, then started throwing a blinking check engine light (misfire).
Would bad gas foul a plug? I put alot of drygas in the tank, and filled about 1/4 of the tank up with good 93 octane gas.
When you first start the truck up it runs really bad and shakes, but when it warms up it runs a little better but still not right.
The plugs are 12c motorcraft coppers about a year old, and 20k miles on them.
I’m going to put a set of autolite platnium plugs in the truck, and see if that helps it out. This thing is a bit of a bear to put plugs in, so i’m not looking forward to it.
Thanks.
JH
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### Author:  [@JEG](https://forums.speedlife.net/u/JEG)
#### Post date: [October 17, 2006, 8:12am UTC](https://forums.speedlife.net/t/would-bad-gas-foul-a-plug/18879/2 "2006-10-17T08:12:17Z")
Could it be your fuel filter? also, is it fuel injected? could have got some shit in your injectors, but don’t quote me on it. 98 I take it its fuel injected. I would run some injector treatment threw it. As far as spark plugs, bad gas will foul plugs because it doesnt burn clean and gets sediment and shit on them. I would take them out and check them. If they are really scroched then use a very light sandpaper and clean them off. I am no mechanic, but thats my $.02
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### Author:  [@JustinH](https://forums.speedlife.net/u/JustinH)
#### Post date: [October 17, 2006, 8:15am UTC](https://forums.speedlife.net/t/would-bad-gas-foul-a-plug/18879/3 "2006-10-17T08:15:09Z")
I put plugs in it, had a wet one in the back of the engine. Runs fine, thanks.
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### Author:  [@JEG](https://forums.speedlife.net/u/JEG)
#### Post date: [October 17, 2006, 8:24am UTC](https://forums.speedlife.net/t/would-bad-gas-foul-a-plug/18879/4 "2006-10-17T08:24:34Z")
:tup: So was it just fouled plugs then?
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### Author:  [@Dr.Stevil](https://forums.speedlife.net/u/Dr.Stevil)
#### Post date: [October 18, 2006, 6:44am UTC](https://forums.speedlife.net/t/would-bad-gas-foul-a-plug/18879/5 "2006-10-18T06:44:17Z")
hmmm… that’s wierd. never heard of that before. Was it wet with fuel or with oil? maybe getting a little blow by? (did you get an oil change recently?)
gimme a call if ya want any help man
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### Author:  [@JustinH](https://forums.speedlife.net/u/JustinH)
#### Post date: [October 18, 2006, 9:42am UTC](https://forums.speedlife.net/t/would-bad-gas-foul-a-plug/18879/6 "2006-10-18T09:42:06Z")
> [@Dr.Stevil](#):
>
> hmmm… that’s wierd. never heard of that before. Was it wet with fuel or with oil? maybe getting a little blow by? (did you get an oil change recently?)
>
> gimme a call if ya want any help man
yep, i gotter dun…
Turned out to be a fuel fouled plug in the rear. I think i was running too cold of a plug for that thing anyways, i went to the stock plugs and the stock tune for now.
Thing idles like a northstar…