acceleration issue, bad tps?

[96lt1]

Hey everyone,

I am currently working on a 93mtx that I picked up not running. I have gotten it running and one by one I have been getting the issues on the car straightened out. I am down to two things.
First is the biggie. When you drive the car normally it runs absolutely perfect but if you go to WOT it will cut out for a second and then come back with 100 percent power. I tried unplugging and changing the maf with no luck, did a basic tuneup, nothing.
Last night I was messing with it and found a tps I had laying around. I swapped it out and drove it, no change.
So I decided to just unplug it and see what happends. I started to drive it, from idle to 2500rpms it would barely even move, but once I hit 2500rpms it shot off like a scalded dog. I found as I drove it some more that as long as I was above 2500rpms the hesitation I had at WOT was completely gone.
So I ask, is the TPS the culprit? If not anyone have any ideas?

The second issue I think may be related to the first, it is that in order for the car to start I have to hold the gas pedal to the floor. Once it fires it will smoke for a minute and then is ok. I am hoping solving the first issue may help with the second.

Any info or help would be greatly appreciated!

Thanx,

Sean

 

[rubydist]

Does it set any codes?

When it fires up and smokes, what color is the smoke?

 

[SHOslamwagon]

my atx was sort of doing this, but it was also having 'cold' start issues, i had to throttle it a bit until it would start to normally idle and would sometimes die out when i shifted to drive until the engine was fully warm, i replaced my iac with one of a MTX and then it started doing exactly what you mention and it started fine, and again nearly exact same things when i unplugged it but it idled rougher, then when i finally put the intake the iac belonged to on everything was perfect. which i don't quite understand :S the only difference between the two intakes was that my mtx one didn't have all the egr hookups, so that stuff is hanging loose in the engine compartment.