TREYFIGGS

Well I have replaced the ECU and from first thought it worked. however, my wife, bless her heart really doesn't pay much attention. I drove it yesterday for a good amount. it is still running really rough. What I have noticed is it really lags when you give it hard gas. lay down the finally reacts...slowly. Starting from stop you can really tell it also if I'm trying to get into the fast lane from slow lane. also when sitting at stop I can feel the motor surging, erratic rpms. Anybody have any ideas what this could be? thank you in advance. Thank you ,
Trey

Yamae

Was the replaced ECU had all recommended new capacitors and traces were not damaged?

I still don't understand fully what you have done.
You once wrote,

"I think I'm gonna have my original one rebuilt like you did yours".

and then at your next post, you wrote,

"Yes, I did".

So I thought you have replaced all capacitors. But you didn't write the details and I have no idea to comment.
If you are in a situation as follow, you need to replace all those QAS capacitors since those are 27 years old and mostly outdated.
"You used another ECU which still had original capacitors."

PureDrifter

iTrader: (10)

What symptoms were you having before replacing the ECU?


Too often people replace/rebuild them without properly diagnosing what the actual root cause of their issue is.

TREYFIGGS

Sorry I was so confusing, this is all foreign to me. I bought a new ecu and had a guy (certified electrician and a wicked solderer lol) put the caps on. That's why I I'm confused to what it could be now. Again I'm sorry if I don't make the most sense, I really mean to. Thank you.

TREYFIGGS

Same thing as I said in the first comment on this thread, plus when at a stop/idle it has erratic rpms. Can feel it in the peddle when in drive at a stop. Occasionally it just dies, like i turned the car off. when I pull over and turn the key off I can start it right back up. Thank you

python

iTrader: (4)

iac...tps..air flow meter. rebuilding ecm's arent a fix all,pd is correct. i replaced my caps just so i wouldnt have to worry about it in the future (3 years ago) but i wasnt having any problems and bought the exact caps yamae is referring to.

shamanic

Have you narrowed it down to determine if its a misfire on all cylinders or one in particular? I'd start by removing spark plug and distributor covers. And when its acting up have some injsulated gloves, pull each spark plug wire at cap and see if it makes a difference. If all cylinders are hitting, I'd lean more towards an air fuel ratio problem, have you checked fuel pressure?

TREYFIGGS

I have not checked fuel pressure yet. Pretty much does it all the time so I'll check that probably tonight when I get home from work. And as far as fuel pressure, how do i check that and do you know off hand what it should be. Thank you.

shamanic

I'm pretty new to the 1uz but if you dont have the tools on most fuel rails theres a little vale you can release fuel pressure with and if you have good fuel pressure should spray prettty well. Now again this is on like say a 360 magnum v8. I don't know if the 1uz has such a thing ,but it should.

TREYFIGGS

thank you bro, I'll try that this weekend. All the help is GREATLY appreciated.

Trey

MaxdOut305

Hey Trey, I saw an old post of yours and I seem to be having a similar issue. Did you finally solve the problem? Would like to know what it was. Thanks.

RA40

iTrader: (6)

He hasn't been active since 8-2017.

May want to start a fresh thread with your car's symptoms and what has been done so far.