350 TBI Running rough

[95six.five]

I've been having an issue with my truck lately, it idles kinda roughly but if its under load and under about 2k rpm's its runs pretty rough, shaking the truck, but once it gets over around 2200 it runs just like normal. it seems like its getting too much fuel but i'm not sure. I've already replaced fuel filter, plug wires(one was burnt), distributor cab and rotor and cleaned all the spark plugs. The cap and rotor cleaned it up a little bit but its still doing it. Any idea where to start now?

 

[95Escahoe]

Has the TBI ever been rebuilt or cleaned?

 

[95six.five]

Not sure. Think that may be a good place to start?

 

[95Escahoe]

It wouldn't hurt, might be shocked how dirty it is, mine had a shake took the TBI off found the base gasket was cracked and missing in one spot, replaced it along with a cleaning and rebuild been great since

 

[95six.five]

So i guess just take it off, clean it up and make sure everythings in working order?

 

[95Escahoe]

Ya, get a TBI rebuild kit off Ebay or your local parts store take it all apart, use carb cleaner clean it up real good don't use the carb cleaner on the tps, iac or Injectors, its pretty easy to take apart theres vids on youtube too

 

[95Escahoe]

And if u got a 2nd car you could even send the injectors out to be cleaned

 

[michael hurd]

Does it sound 'loud' and lope at idle? You may have a stuck EGR problem, not uncommon. You can try your fingers or another vacuum source like a hand pump to try and move the diaphragm.

 

[95six.five]

Does it sound 'loud' and lope at idle? You may have a stuck EGR problem, not uncommon. You can try your fingers or another vacuum source like a hand pump to try and move the diaphragm.

No, it doesn't really sound any louder than usual at idle. every now and then it sounds like it has a little "baby" backfire, just kinda like a blub noise. I Fixed a vacuum line just earlier and it smoothed it out a little but it still does it some.

 

[95six.five]

The bogging down has gotten worse and it's backfiring through the throttle body now...i've gotta get this fixed. anyone have any ideas?