Skip, miss, cut-out

[Flowtech1ton]

Hey guys I got a 1988 seirra 3500 with a 350 5.7. The motor was new about 10000 miles ago and I have had this problem for awhile now. When at slow speeds where I am barley touching the throttle the truck will skip miss and cut-out. It will act almost as if its not jetted right but its got tbi. The only mod i have done is a flowtech dual exhaust without cats. It has a leak in it could that be my problem?

[03chevy]

have you checked this stuff out yet?
1Inspect Idle Speed Control Actuator Damaged, loose, or faulty idle speed actuator

2Inspect Throttle Position Sensor Faulty throttle position sensor or throttle position sensor circuit.

3Inspect Wireset Damaged, worn, or deteriorating spark plug or coil wire(s).

4Inspect Idle Stop Solenoid Damaged, loose, or faulty idle stop solenoid

5Inspect Idle Air Control Valve Damaged, loose, or faulty idle air control valve

7Inspect Spark Plug Wire Loom - Performance Improperly adjusted or worn/malfunctioning carburetor.

8Inspect Air Filter Clogged or dirty air filter

9Inspect EGR Valve Clogged, dirty or improperly functioning or defective egr valve.

10Inspect Fuel Filter Clogged or dirty fuel filter

11Inspect Fuel Injector Plugged, dirty or poorly connected fuel injector.

12Inspect MAP Sensor Improperly connected or faulty m.a.p. sensor.

13Inspect PCV Valve Plugged or damaged pcv valve.

14Inspect Point Set Burned, worn or incorrectly set ignition points.

15Inspect Spark Plug Fouled, damaged or broken spark plug(s).

16Inspect Fuel Pump Improperly functioning fuel pump or circuits.

[1205hunt]

you might check the computer codes. Drivability problems can be tough but I think 03chevy has all the basis covered! I dont think you can be to thourough with the gas prices like they are!

[leolkfrm]

codes are great if its simple. I think your problem would be better addressed with a good scan tool, so you can see the actual sensor readings. I sounds like an intermitant fault which is not setting codes

[jimbo543]

egr valve is b/o
unplug vacum hose at valve and drive to test/verify part

[huffcop]

I think the 88 year was before OBD II computers. Get your hands on a Chiltons or Motors manual for the truck and it will tell/show you which two proms in the diagnostic plug to jump with a paperclip or wire. It will then flash any codes through the service engine light. I used to do this on my 87 Chevy and it was a lot cheaper than buying a scan tool.

[leolkfrm]

a scan tool may show a weak part causing a problem, where a a code check does not.