Maybe you can help????

[dreamwalkin97]

Hi everyone I'm new here. I have a 1997 Cheverolet K1500 4X4 Stepside with a 5.7L engine in it. It used to have a 4.3L engine in it and I got crazy one day and decided I wanted the 350. I changed the wiring harness and the computer too. It ran great for 4 years. Now I'm having problems. It's blowing fuel out the exhaust. I have replaced all my injectors and my fuel regulator. I put a new timing chain in it. Did a tune up. And it is still blowing fuel out the exhaust, but not as bad. Has anyone ever come across this problem??? Is it the computer maybe???? I need some serious help.....lol. I really miss my truck and I need it fixed so if anyone has any suggestions please let me know. Thank you Lori

[Haulin' 8.1]

Try running it with the MAF unplugged and see if that clears it up, could be bad MAF. It's not running so bad that a stuck open exhaust valve would be a posiblitly is it?

 

Vernon