Engine 1989 5.0 Lx Rough Idle. Need Help Pls

[Jean-Francois]

I have an 89 mustang lx and the problem I'm having is as follows:

Rough idle--searches for idle from 600-1000 rpm.
Stumbles under acceleration. Feels like its missing.

My car is mostly stock but I put 24lbs injectors cause I have to replaced the old one and I thaugh thats gonna be a good idea to upgrade to a bit higher. After all I found my car less powerfull and burn out the o2 sensors, so I changed the o2 and the MAF sensor (BBK 24lbs pre-set). Power is back but the car won't run great on idle or when is got no load. I've been chassing the problem for a while but I need Help.

Thanks

J-F

 

[foxbodymike87]

Codes?

 

[mikestang63]

I have an 89 mustang lx and the problem I'm having is as follows:

Rough idle--searches for idle from 600-1000 rpm.
Stumbles under acceleration. Feels like its missing.

My car is mostly stock but I put 24lbs injectors cause I have to replaced the old one and I thaugh thats gonna be a good idea to upgrade to a bit higher. After all I found my car less powerfull and burn out the o2 sensors, so I changed the o2 and the MAF sensor (BBK 24lbs pre-set). Power is back but the car won't run great on idle or when is got no load. I've been chassing the problem for a while but I need Help.

Thanks

J-F

check the "surge idle checklist" made by jrichker. All your answers are there.

I had three Doritos Tacos for lunch today. Damn they were good.

 

[Jean-Francois]

No code

 

[Jean-Francois]

I look for codes and nothing than I re-adjust the TPS at .9 volts and than reset the computer. No change at all.

 

[boostfrk]

Go through the surging idle checklist as mikestang suggested.

http://www.stangnet.com/mustang-forums/threads/help-me-create-the-surging-idle-checklist.698148/

 

[Jean-Francois]

Thanks I'll try it.