Garage Storage Organization and Garage Cabinets

NA2ndgen · 07-24-2006, 12:33 PM

Quote:

Originally Posted by Una

It does set fueling a bit rich without a map, but it's better than it would be running if the map were hooked up and telling the computer that you were at 14psi (or I guess 0psi/no vacuum on an N/A motor).. It'll be close enough to fire up and run..

Silly question time.

If I got stranded, because it turns out my MAP sensor went bad on me, would just unplugging the bad MAP allow me to drive home?

I am guessing it would, but as c2xejk said, it would be running way too rich.

At the very least, if it started up and ran badly, then I would know it is likely the MAP sensor.

DustyR/T · 07-24-2006, 02:23 PM

once the ecm isn't registering an adequate reading from the MAP, I'd imagine it would run it memory or open loop if not from signals on the TPS, O2, and pickup. Much like an Oxygen sensor. When there is a short to circuit, high or low voltage reading, or circuit malfuction, it runs in memory mode or open loop. A bad map should run the same connected or disconnected.

Ondonti · 07-24-2006, 02:27 PM

I am using the same 30lb injectors that I have never had a problem with before. I did not put my big injectors in.

Una · 07-24-2006, 02:49 PM

WAY back in the day, I had a SC blow a line off the map sensor.. Drove it for several days without melting anything (god only knows how).. But the gas mileage and driveability were BAD...

Ondonti · 07-24-2006, 02:50 PM

This isnt helping me.

Please, On topic. Create another thread..........

Ondonti · 07-24-2006, 03:30 PM

Well I swapped engine harnesses.......the spirit runs fine with the other harness.

Now when i hook up the jumper cables to the Duster, it is reading no voltage. I screwed in the ground that I have on the passenger motor mount, and I started reading like 16 volts............then I screwed in the one on the alternator and that didnt make a difference.

What would cause my voltage to be so high?

**c2xejk** · 07-24-2006, 06:00 PM

Ok, let's see if I understand you correctly... You have jumper cables connected to the Duster and to the running Spirit?

First question, what is the voltage really? If it is 16 volts, then you have a problem with the Spirit. If not, recheck all your ground wires... Including the two two on the driver's side of the heads and the one under the battery...

NA2ndgen · 06:13 PM

Quote:

Originally Posted by Ondonti

What would cause my voltage to be so high?

16 volts? Battery voltage would be less than that. So the engine is running?

Since I assume the engine is running.

WTH ?? It may be that your battery is out of the circuit, not connected, and the lack of battery load is causing the alternator to output 16V.

Without the load on the alternator, provided by having the battery connected, the voltage regulator wont regulate, i.e. turn down, the voltage output from the alternator.

Recheck the connections from alternator to battery and all your grounds.

NA2ndgen · 07-24-2006, 06:21 PM

Just intuition here, since nothing Ondonti just said makes any sense to me, but could it be that the battery to engine ground wire is not connected?

I would check that.

NA2ndgen · 07-24-2006, 06:23 PM

Who's on first?

That's right.

WHAT?

He's on second.

Ondonti · 07-24-2006, 06:33 PM

The spirit is running so I dont kill the battery in the spirit when I crank the duster.

I have to jump the duster to get it started.

voltage on the spirit is normal.

The dusters dash displace all of a sudden decided to say 17ish.

Ondonti · 07-24-2006, 06:34 PM

Im going shopping at the moment for a cheap multimeter.

Ondonti · 07-24-2006, 07:49 PM

Well What I seem to be seeing is something wrong on the dash display.

The multimeter reads 12.5 on both battires when the jumpers are on the duster and the spirit is not running

~14.00 on both battires when the spirit is running.

The dash display is all of a sudden reading really high when that is not true.

**c2xejk** · 07-24-2006, 07:59 PM

Then I would spend time checking all the grounds...

Ondonti · 07-24-2006, 08:02 PM

Okay, I pulled apart the black 17 pin connector.

The ground and power feed for the coil both read .33 volts

Three of the injectors read .33V (probably the injectors that were clean) #2 4 and 6 injectors on the front bank of cylinders.

What do I start messing with to unground them?

Im guessing the problem is on the injector harness since I have swapped between 2 engine harnesses that both work on the spirit.