1995 K1500 light throttle mis

[Cam8442]

Hello,

I have a 1995 K1500 truck with a 350 TBI, and need some advice. The problem is at light throttle it misses, and slow steady speed cursing it misses (surges), slight miss at idle also. When towing it is real noticeable. But if I apply more throttle it clears up and runs great (plenty of power). My gas mileage has gone to sh!t also.

The following has been changed in the last month.
Spark Plugs (Autolite)
Cap and Rotor
Sparkplug wires
Fuel Filter
Air Filter
PCV valve

I cleaned the EGR valve and IAC. The last 4 tanks of gas I added fuel injection cleaner.

Scanned the computer, no codes, and everything was within spec. I have not checked the fuel pressure yet mainly because under heavy throttle it runs great.

Thanks

[2000CAYukon]

Does the EGR solenoid hold vacuum on the TBI side? For a quick test, remove the vacuum line from the TBI to EGR solenoid and plug it. If the problem clears up, the solenoid or EGR valve is your problem.

My problem is similiar except (in my case) that the timing is jumping around at idle. Double check that your timing is 0 with est disconnected.

//2000CAYukon