73mm C&L rough Idle

[Lazzman]

After I installed my 73mm C&L MAF, my truck does not idle as well.

If started when cold it will fire up nicely then fall back down and sputter for a bit, to the point where it almost stalls out, then it seems to catch its balance and idle smoothly again.

Wonder if this has something to do with the new MAF??

 

[Fredness]

How does it run with the MAF unplugged?
Did you try cleaning the MAF?

Maybe reinstall the old MAF to see if it is related to the C&L?

 

[edhand]

It sometimes takes a little while for the computer to "learn" the new MAF...it's also a good idea (if you haven't done it) to disconnect the battery for a few minutes to reset the computer.

 

[Fredness]

...or if you have an XCal2, reload the factory program and then go back to the tune you had selected which cleans out the learned values.

 

[Lazzman]

Good advice, thanks...

 

[Lazzman]

While driving my Sport to work today I noticed that it had better performance than it ever had, it really got up and screamed when I hammered it. It was quite surprising.

I have read that the vehicle needs time to get used to new uprgrades and make adjustments, but never believed it totaly. The idle seemed improved a bit as well and was up about 150 rpm's in park.

I also added 89 octane gas as opposed to the 87 I usually put in, for the first time since the Demon coil and C&L upgrades. My truck has always run best on 89 since the chip calibration.

 

[aldive]

Get that bad boy on the dyno Lazz.

 

[Lazzman]

Yes, I have to come up with the $450 first- which sucks this time of year.

$200 for the re-tune + Dyno time at $75 an hour and some minor adjustments I am going to have him do; re-gap plugs to .065 and check for vacuum leaks. Not going to make the same mistake twice, costs too much money.

There is also a small fee for removing and installing the front drive shaft.