today i noticed my commander at an idle was reading 1psi on boost, but then it would go back to 0psi it does it about every 30sec. or so. it keeps doing this, but idont think it is anything serious, im just curious as to what would cause this

 

any ideas?

 

I'd say the Commander. But then what do I know? I've never messed with one before.

 

More than likely it is just getting a little high resistance at the connection. Do you have the wire tap or the plug and play? I have to wiggle mine every now and again to get the boost to read right.

 

My boost (at idle) ALWAYS reads 8psi...dunno why, but it's done it since day one. I emailed quadzilla and they said to make sure I had the wire tapped correctly (done) and to make sure I had selected the correct vehicle (done). No change. I trust the other readings so I just ignore it...would like it to read correctly, but not sure its worth repeatedly messin' with it... -2cents

 

By the way, anybody know where (just in case) I can pick up a new MAP sensor? I've checked most Autozones/Oreily's and they don't seem to carry them. Tks. -d

 

Cummins, and I was actually going to say odds are good the sensor is bad.

Shawn

 

Try these guys. Their prices are very good. http://www.hoeslidiesel.com/specials.htm

 

i was thinking maybe the sensor too, because it also jumps around while driving, ie: i can be running 8psi and it will jump to 10psi and then back to 8psi. i talked to quad and they said it was probably getting a little bit more voltage and that it was more than likely the sensor

 

That's where I got mine from. Good guys to do business with.

 

well i ordered my new map sensor from www.hoeslidiesel.com, and it is a little bit smaller in size than the factory one. it also takes a 1 1/16" socket instead of an 1 1/4" socket. is this the right part and will it work ok on my truck?

new map sensor part#4921497

 

Their website says that part # covers 98.5-00, so you should be good.
I had to go buy a deep well 1 1/16 socket to change my MAP sensor, $26 for a socket from NAPA .