3 bar map problems

[limitedv6]

Ok I am having problems I have a 2 bar with no issues but when I plug in the 3 bar (which is new) in the car run's like crap. I remember some years back that we had to change the wires around on the plug. I can't find no info on which wires to change around any help would be appreciated thanks

 

[Pronto]

The MAP must have a vacuum leak in it. I doesn't control anything except the stinky dash boost gauge. No wiring changes are needed either. Plug and go.

 

[pacecarta]

3bar replacemnet map sensors for the TTA required the power and ground to be flipped for use in a TTA because the original TTA 3bar was reversed as was the wiring , not sure how you would have even get ahold of one of those original TTA sensors

like posted all it does is drive the stock boost gauge and nothing else unless you run one of the following:
(A) razor alky injection
(b) fast, XFI, big stuff 3 or a tt sd chip
(c) datalogger like powerlogger to log boost over 15psi
(d) a new electronic boost gauge

for stock application the 3bar does absolutely nothing better for the car vs. the stock 2bar other than make the stock analog dash LED boost gauge read incorrect

and its not connected to the ecm so it cant have any effect on its operation

 

[limitedv6]

I run alky and a data logger before I got the car it has a gen 6 or 7 on it I know it is not suppose to effect the running but it is just trying to chase it down. Ok the power and ground was the wires to be swapped correct. oh and the green wire for the map under the dash has a t going back into the ecm found it while wiring in the boost for the power logger thanks.

 

[TurboBob]

3bar replacemnet map sensors for the TTA required the power and ground to be flipped for use in a TTA because the original TTA 3bar was reversed as was the wiring , not sure how you would have even get ahold of one of those original TTA sensors

I believe this is not correct, although it is not the cause of the O.P. issue.

try turning the alky off, it may be kicking on too early.

Bob

 

[Pronto]

What data logger? The green wire is the MAP signal to the dash boost signal, you tap into when using the Powerlogger for logging the boost. Don't know why that green wire would be running into the ecm. What chip and alky kit are you running?

 

[limitedv6]

I have razors kit and a TT chip car runs perfect on the 2 bar but runs rough and check engine light comes on with the 3 bar.

 

[TurboBob]

which TT chip?

if the check engine lite is coming on, then what code is it setting?

Bob

 

[limitedv6]

Alky is off this is at idle I am running the razor kit and the car has a data loger on it I haven't logged it since I tapped into the green wire I am sure I tapped into the rite wire as I checked voltage.

 

[limitedv6]

ok i went out this morning and on the power logger the boost is all over the place at idle. when i plug in the 3 bar it gives a code 34 maf this is getting funny now. i am going to have to chase the black wire that is spliced in to the green wire for the map. this must have something to do with the old dfi system that was on the car before i got it. I checked the ground and the power for the boost wire on the power logger and ran 1 wire from the green under the dash to the l2 on the block for the power logger any ideas thanks.

 

[Pronto]

This might help.
Power Logger MAP

 

[SIXBANGR]

Help is a phone call away, call Razor.

 

[limitedv6]

I am thinking on the dfi they may have pulled power from the map to the maf this is most the time done in the engine compartment and from the tps so I am going to cut the black wire and see what happens.

 

[limitedv6]

Ok I went ahead and cut the black wire and hooked up the 3 bar car had no check engine light on and idles ok so I am guessing it was pulling voltage over to the maf wire. thanks for the replys.

 

[pacecarta]

for dfi to work it needs a map not a maf and the map signal to be installed to the maf input wire so you need to undo the map output to maf input

 

[limitedv6]

No at one point the car had a dfi now it is on a stock ecm all is working fine since I cut the black wire no check engine light and idles smooth.

 

[bison]

If you had a MAF code id look at the MAF and its connectors. What MAF? Id be sure that the MAF connector is not plugged in upside down. If it is not then its likely a bad MAF. I dont see how a MAP sensor would cause a code 34. I believe the info that pacecarta stated about the wiring to be wrong also. The sensor is the same as any of the other 3 bar sensors that GM sold.

 

[bison]

Ok I went ahead and cut the black wire and hooked up the 3 bar car had no check engine light on and idles ok so I am guessing it was pulling voltage over to the maf wire. thanks for the replys.

Sounds like the removal of the dfi wasnt totally completed and it likely used the MAF wires for the MAP sensor. You better verify your MAP is still functioning if you have alky injection. As a fail safe its a good idea to run the MAP 5 volts off the TPS like it was since you would know right away if the 5 volt source was lost since you would have a TPS error code which would alert you that your alky injection probably isnt going to spray.

 

[limitedv6]

Thanks guys bison you nailed it after I cut the wire all is fine or appears to be the dfi was not fully removed etc wiring. I will make sure the map if working properly but all seem's fine now.thanks.

 

[Razor]

Key on engine not running green wire on MAP is suppossed to read 1.6 volts DC on a 3 bar.

If it reads 1.6 volts.. 5volt reference and ground are correct.

You will need a digital multimeter to read this.