ok here it is 87 350 auto she runs good untill wormed up then she losses power on take off after a few she pickes up and goes with out aney help she sat for a year so i replaced ecm,tps,o2,knock,coolent temp sencer,all new dis. in and out,plugs,wires,new ful pump,intake gasket,esc,iac,rebuld on tbi,oil pump,rod berings, when i droped the tank cleand out put back she seemed to run wors after that. I am soooooo lost. and there is no codes. im abought ready to replace the prom and map sense thats all thats left. im going to rebuld the moter so i dont mined having all new on the out as well. but I do need this runabilty fixed.

 

Fuel filter? check timing

 

full filter been done timing good and I did dis-conect the wire to do timing

 

I guess make sure there are no vacuum leaks and you have proper fuel pressure, not unheard of to get a bad fuel pump out of the box

 

i had put the pump is 2 years old and did not start acting up tell this last time of pulling the tank. and it onley does it after worm up

 

what about the temperature sensor for the computer. the one located on the front of the intake. had a truck at work that was running like crap and thats all it was. was telling the computer it was running at like 19degrees always

 

i have replaced all sencers except the map and have not replaced the prom chip

 

Have you replaced/checked your vacuum lines yet?

I just fixed my EGR system and I started having your problem semi-frequently, but not 100% consistently. I thought it was maybe a bad egr solenoid allowing the egr valve to open, but yesterday I found a cracked plastic vacuum line between intake&egr when I did my intake manifold gasket. (not the first, but usually I notice when I break one)

If my problem persists I'm going to replace the map sensor. I think you can try running with the map harness disconnected to see if it's your problem, but don't quote my on that =).

 

yep i have no vac. leaks im replacing my tbi. and injectors with one i know that works to see if thats the problem

 

Did you try running with the map sensor disconnected? If there's no change it's not that.

Measure your coil resistance values (primary & secondary). Edit: Er, n/m I missed where you wrote 'all new dis in and out'

let us know if you figure it out.