Does installing from the cat back with two flowmaster 40's cause the engine to ping. I was just wondering because I have a new 5.4 fx4 screw and it pings even after it is warmed up.

Thanks
Shane

 

Should have no effect on pinging whatsoever.... Unfortuantely, there's a whole list of other possibilities that could cause your problem.... Useing fuel injection cleaner, and cleaning your MAF are usually the tip of the iceberg. If that doesn't take care of your problem if you will do a search you will find many suggestions to work through... You might also consider a chip.

 

Ill try that thanks stx/98
shane

 

Dont forget a new fuel filter.

It's amazing how many people out there have 50k on their truck and the factory filter still on, heh

 

uh, heh heh, gulp, 51,500 and still have factory fuel filter and my 4.6 pings. Dont hurt me

 

you said your truck was new so I wouldn't worry about the other posts on this thread. Of course a chip wouldn't hurt if you want to go that route!!

Did you reset the computer after the muffler install? Give that a try because those two flows have changed the way the engine performs but the puter is still trying to do it the old way.

also buy a brand name gas and do not go higher in octane as to what your manual calls for.

good luck-

 

HCMQ

I was wondering how do you reset your computer chip.

Thanks Shane

 

Disconnect negative battery terminal, turn headlights on for 5-10 minutes, then reconnect the battery terminal. When starting your truck back up for the first time, let it idle for atleast 5 minutes before driving it so it can relearn it's idle properties. Your truck will shift a little strange for the first day or so while it relearns everything. BTW, how many miles do you have?

 

I have around 9000 miles on it.
Shane

 

When clearing the computer, don't forget to turn the light switch OFF prior to reconnecting the battery. The big zap could do a lot of damage if your luck just happened to run out.

 

BzzzzT!

 

...And if your luck really ran out, your battery could go KABLOOEY!

You do not want a battery to blow up. It sounds like a bomb. I had one blow up at startup on my old '87 and I thought somebody had booby trapped my truck. If it happened today, I'd think Bin Laden's denizens had gotten to me. To add insult to injury, the engine compartment was totally sprayed with battery acid. Not a fun thing to deal with.