Bad stall problem

[jayzauto]

Ok guys 91 mj 4x4 inline six. It has set for 2.5 months and I replaced brake system and fuel rail and injectors. I added her and 10ga of new gas. And it idles fine revs fine in park and neutral but as so as it hit between 20 and 30mph it stalls out like it's not getting gas. Also I don't think it's shifting into 2ed. Is this my tranny going out and if so what all trannys will fit and what tranny do I have?

[gogmorgo]

First thing check your codes. The only tool required is your ignition key.

http://comancheclub.com/topic/28111-reading-obdi-91-and-92-mj-fault-codes/

 

When you say it's not shifting to 2nd, (I'm assuming it's an automatic here, sorry if it's in your signature, can't see it on my phone) do you mean it seems like it's revving right out in first and not shifting or skipping 2nd? What happens when you try to select lower ratios? Have you disconnected the trans computer to see how it acts?

 

When you replaced the fuel rail, did you check to make sure you plugged in all the electrical and vacuum connections? When you replaced the brakes, if you touched the booster/master cylinder, did you bump any vacuum lines?

 

Assuming again you've got an automatic, you've got an AW4 transmission. Don't worry about replacement until you've figured out what your problem is.

 

General tip, if you want specific answers, you need to ask specific questions, and provide as much specific detail. Good grammar and proper punctuation helps as well.