Please tell me it's not the transmission

Valley olds · 05-25-2008, 10:34 PM

What up everyone, I was having some trouble and I thought maybe you could help. Today me and a friend installed a sound system on my alero. Things we had to do included taking the air intake box and tube off, and making a hole on the bottom gromet. We then installed the amp but didnt find the remote on the stock stereo, so we put it direct. When all was said and done, I turned on the car and got the service engine soon light on. A couple hours later, I was going to my friend's house so he could remove the light, on the way, my shifting was really hard. Switching from park to reverse or drive had a real hard shift as well. Also the car turned off at a red light. I looked this up with the search, and it said that the IAT sensor could cause this. Anyone else have suggestions? I dont know if this heps, but my friend got a P0107 code on the computer scanner. He did'nt know what that was though.

Vtolds · 05-25-2008, 10:47 PM

If you unplugged the battery then the trans is probably going threw a relearning process trying to figure out how you like to drive.

[ion] C2 · 05-25-2008, 11:06 PM

^Got it.

P0107 is the MAP voltage low, this can be caused by the vehicle going into limp mode and the relearn process. Normal.

00oldsalero · 05-25-2008, 11:59 PM

u plug the plug back in on the mass air flow sensor

Valley olds · 05-26-2008, 12:13 AM

Well, I reconnected the IAT sensor and disconnected the battery for 15 minutes, as recommended by another thread on this forum. Shifting seemed to be back to normal so I turned off the car. I turned it on again a minute or two later, and the hard shifting is back.

00olds Alero: the first time we turned on the car after the sound system installation, we didnt even have the intake tube on. This was no more than five seconds though. After that we turned it off, then put everything back together, including the plug on the mass airflow sensor.

Vtolds and [Ion] C2, after reading this post, I dont know if it changed your opinion, but if the car is trying to figure out how I like to drive, do you know how long it will take before it is back to normal?

AftermathAlero · 05-26-2008, 01:21 AM

If the MAF is plugged in. Then it sounds like the wire broke inside of the harness plug. It happened to me before. A new harness plug to splice in to replace it is 30 bucks from the dealership.

The MAF harness plug sucks if u unplug it too much. Its not getting the voltage for the computer to run normal so it thinks the maf is unplugged 24/7.

Valley olds · 05-27-2008, 06:43 PM

Hi everyone, I brought my car from the mechanic today. He says he thinks I left the MAP sensor disconnected, or wires in it broke like aftermath said. The reason he thinks this is that every time they delete the trouble code it will appear again. He told me if the actual sensor is messed up it will let you drive a while without the trouble code a couple miles and mine doesn't. He didn't know where the MAP sensor was though. Do any of you know where it is?

xXManwhoreXx · 05-27-2008, 09:20 PM

I think it's near the throttle valve

Did I do a good job guize?

AftermathAlero · 05-27-2008, 09:50 PM

It should be your MAF sensor plug. not the MAP sensor.

Redog · 05-28-2008, 06:24 PM

If you're mech doesn't know where the MAF sensor is, get a new mech

-Alero- · 05-28-2008, 07:20 PM

wonder if it was verified if this was a v6 or i4

AftermathAlero · 05-29-2008, 01:14 AM

Quote:

Originally Posted by -Alero-

wonder if it was verified if this was a v6 or i4

I believe the 4 cyl don't have MAF's. only the v6 does. (correct if wrong)

-Alero- · 05-29-2008, 03:31 PM

correct sir, the IAT is and MAF are a 2 in 1 combo for the I4

Twiz · 05-30-2008, 11:40 AM

Test the MAF sensor. If the MAF was disconnected from the throttle body at some point and you ran the engine like that then the MAF resistor overheated and it's prolly shot. The MAF resistor must be cooled off by intake vacuum. It has to be connected to the throttle body all the time while the engine is running. Does it make sense? Anyways just a tip.

01silveralero · 05-30-2008, 02:38 PM

Quote:

Originally Posted by Redog

If you're mech doesn't know where the MAF sensor is, get a new mech

there is no maf on the 4 cyl noob....and ur not the only one who has a slow delta he has one also

Valley olds · 05-30-2008, 05:01 PM

Finally got the car fixed. After taking my car to 5 different mechanics, the fifth one suggested I take it to the GM dealer, so I did. Turns out that when I pulled the power amp cable through the firewall, one of the wires got torn off the computer's harness. The dealership then fixed the wire on it, and now my car is ok. Thank you for your input everyone, I really am glad that there is lots of support here.