This last time the battery was not dead, the terminal wasnt getting a good connection. Replaced the terminal and its fine. Previously however the lights were surging and that was the voltage regulator on the alternator. I replaced the alternator and its fine.

Truck still runs rich/horrible. Cat was clogged and the shop replaced it with a straight pipe. (Free and I have no emmisions in Hall county) and I guess tomorrow I will finally have a day off to get the numbers off the ecu case. Like I said though, the ecu looked clean when I last cracked it open but what area should I look at if the injector driver was messed up? I read about somebody elses issue and that solved it. I'm really sick of putting all this street time on the RX-7! <img src="/forums/images/graemlins/zombie.gif" alt="" />

Fasteddy, I grew up in Gainesville and my family still lives there. I'd love to bring the truck up to you but I dont think it would make it as its stumbles periodically and currently gets like 4 mpg.

I suspect that you have another issue, like a leaking injector, a clogged fuel pressure regulator, a pinched fuel return hose, or a leaking injector. I'd pull the plugs and look for one or more with heavy carbon or damp with gas. I've tested for leaking injectors with a vac gauge hooked to the spray end. If it leaks air, it leaks gas.

You may also have a failed ect sensor, and the ecu thinks the engine is very cold and is throwing in a bunch of cold start enrichment all the time, which will also cause the engine to run like crap. I assume the exhaust smells very gassy? I have an ohm meter test for the ect sensor from the fsm, if you have a multimeter (and thermometer - the sensor is a thermistor whose resistance varies with temps). Cheap part and easy to get to.

All good tips. I plan on going up tonight to check a few more things.

ECU part number is MD136477 that I need. Keep an eye out everybody please!

YEEEAAAAHHHH!! Got a new ecu off ebay for cheap (30 bucks) and it works!

Got a spare 90 3.0 V6 if anybody wants it.

Anywho the truck is 95% back to normal with the only exception being after a drive and it comes to a stop its idles low for a while and then works its way back up to 600 rpm or so. Just letting it run and idle it does fine but if you are driving and come to a stop it just dips too low me.

Its only been driven like 20 miles and maybe still learning but other than that its smooth and I have my acceleration back and I want to have my mpg back and be WAY better than before since the tune up. Truck now has egr removed and no cat.

What do you think I should do about that or does it sounds normal for not running in a while?

Thanks for all the help guys. Now that its runs right again I can meet some of you locals.

How old is the fuel in the tank? I would run down most of the fuel in the tank. Then refill with good, fresh fuel.

About 4 month old 87 octane that had about 1/8th a tank in there.

Could be. Can I manually adjust the idle using the biss screw on the throttle body on the 3.0 trucks if it still doesnt come up?

Answer: I adjusted the biss on the throttle body but the idle didnt go up past 550 rpm but i could make it go down slightly. I didnt find and vacuum leaks though. Thoughts?

I think you want the EGR.
I think the idle issue shouldnt be a problem.

That's just what I think.

I removed the EGR and looped the vacuum lines so there is no leaks.

anyone know if that 90 ecu would work on a 91 auto?
and if it would, what would ya charge for it?