So I bought a 1984 Trans am for $500. It had a bad trans. Sounds simple right. I changed the trans got it running and well it had some issues.

So here is what was done to it before I got it. Someone did a lt1 swap on it, just the short block. Kept the oem heads, intake and carb. I am not sure but it looked like they took a hammer to the carb and intake so I changed them. It has a nice oem quadrajet on it and a rpm performer. Also they deleted the smog pump egr and O2 sensors.

So here is what the girl is doing. She has high and low idle issues no matter what I do. Also some hesitation. Its having some lock up issues with the trans to. I have to put it in nutrel at stops or she chugs and dies.

This is my first third gen and I am not used to the 80's engineering.

Please help!!

 

dont be shy. I just need to know a few things and I havent found them in the threads.

 

Well what is your fuel pressure, and do you know what trans it is?

Does it have an electrical torque converter clutch switch? The dieing at a stop is a torque converter issue.

Check for vacuum leaks.

 

It has a new 700r4 in it and its low miles. Not sure about my fuel presure. going to see if I can check it.

 

Looks like your tan wire with a black line on it will be your TCC wire. Personally, I would make sure that the wire goes where it needs to go.

I really don't know, but if the PO just slapped the engine in without a controller of some sort to talk to the tranny, then the TCC will have issues, as well as 4th gear.

So assuming that there could be so kind of magic going on, I would investigate the "tan-blk" wire for the tranny TCC switch, or just disconnect that wire in a convenient place and see what it does.

Perhaps I'm wrong. I haven't had to fix an issue like this on a third gen before. Just trying to give you some ideas.

 

Thanks any advice helps. I just want to avoid tossing parts at it. This car has a been a bit of a pain but I am going to fix it. I just wish I had got a hold of it before the other guy. I love the lt1 but I think things would have been done right the first time.

I guess its time to put her in the air!

 

Is this the computer controlled q-jet? Has a two-wire connector on top and a three-wire connector on front/left?

 

As a matter of fact it is. And I did try to replace it once for about 3 minutes. lol. ya it started up then died. havent messed with it since.

 

lmao!!! Do you guys think my speed sensor being loose might be part of the issue?

 

Okay got the lock up converter presure switch figured out.. but the idle still walks all over.

 

You sure ?
If your water pump doesn't look like this then you don't have a "LT1 " short block

 

What was the issue with it?

 

some how the lock up switch popped loose. so I plugged it back in. it was just kind half way in. lol

 

You do know that is a gen 2 lt1. they made a gen one also. Mine is a gen 1. Its numbers read 1970 0r 1971 corvette 360 hp lt1. Now granted I dont have the orignal heads for it but it is still an lt1.

 

Okay I think I got it all figured out. So I ran threw all my wires and made sure everything was hooked up.. When I was checking my altenator I notice that it was a older one. Ya like 63 amp.. So I swaped it out for a 94 amd, and guess what... it runs great... thanks all for the help!

just some music for yall.

http://www.youtube.com/watch?v=y0F2aYivCmU&feature