Air intake

[picowheel]

so I installed a new cone style filter just like the pictures above and was also going to fabricate my own intake out of the 3 inch pvc. I didnt have time the day that I installed the new filter and adapter to build the intake pipe. I drove it and figured I would just finish the next day but when I drove it the motor started pinging really bad like it was a really bad tank of gas. So I drove it a few more miles to see if anything might change. It didnt so thinking it could be a bad tank of gas I drove around wasting about a 1/4 of a full tank and went to chevron and filled it back up with 91 and put an octane booster in the tank and it eliminated the problem completly.

My question is could it have just been a bad tank of 87 octane from a 76 gas station?

or could it be that since the maf is getting much more air and much colder air, that this caused it to advance the timing and caused this problem or???? any ideas

I havent ran the tank empty yet and tried refilling it with 87 yet to see if it was just a bad tank cause I have had that happen in another vehicle. I have about 1/4 tank left so sometime tomorrow 9/21 I should be re-fueling.

has anyone else had a problem like this after installing an intake?

 

[Jason94sport]

Was it a oiled cone filter? Sometimes the oil from a K&N or similar will crap up the MAS causing problems. Light on the oil & shake the excess off is the rule.
I use dryflow filters now & just wash them every 5K miles.

 

[picowheel]

76 gasoline sucks... haha.. well at least it did the past time I filled u there!!

no it was a spectra dry filter... I think its paper but I just filled the tank this morning on my way to work and it seems to be running fine. I cant believe that It could have been that bad of a tank of gas but it had to be. It ran so bad until I put higher octane in it that I thought something else must have been wrong.

This morning after running it about empty I filled the tank with 87 octane from a shell gas station and it has run just fine the first 10 miles with a full tank.

wow and I always thought 76 had quality gasoline... guess not!!!!

 

[cloaked_chaos]

This should really be in the modified section, not the stock section.

Unhook your battery to reset the computer so it can relearn how to run with the new air flow.

 

[FIND]

The filter won't effect his air flow readings since he is still using a stock MAF.

You had a tank of bad gas most likely.

Edit: Just noticed in your sig you say something about air intake/MAF housing? If you are using a larger MAF, or have modified yours in such a way to allow for more air flow, your MAF will actually read less air going to the engine than it is actually receiving. In most explorers, this will lean the fuel mixture a bit, and in some it can cause you to run a little TOO lean for a while until the computer has learned a new drive cycle. Lean burn on an explorer engine will usually result in knocking. The fact that the 91 octane cured your problem lends some credence to this theory. The best advice would be to follow what Cloaked Chaos said and unplug your battery for 5 minutes so your truck will relearn the drive cycle.