Hi i have a 1994 lc and i have a strange problem with it.
Problem
when i start the truck when it is cold it idles smooth. if i try to drive it right away the truck engine runs really rough.
I noticed if I start the truck when it is cold, then wait about 10 seconds (for oil pressure to build up), then rev the engine to 4k or 5k rpms 2 or 3 times, then drive the truck the engine runs smooth.
Over the last several months i have replaced the following:
-cap wires plugs and rotor
-fuel filter
- fuel pressure regulator
-iac
- throttle position sensor
- cleaned throttle body
- replaced all vacuum lines
- battery
- fuel pump
- vaf ( i have 2 and it runs the same with both)
- air filter
- fuel relay
- relay in drivers side kick panel
- new coil
Any help is appreciated. Thank you
Problem
when i start the truck when it is cold it idles smooth. if i try to drive it right away the truck engine runs really rough.
I noticed if I start the truck when it is cold, then wait about 10 seconds (for oil pressure to build up), then rev the engine to 4k or 5k rpms 2 or 3 times, then drive the truck the engine runs smooth.
Over the last several months i have replaced the following:
-cap wires plugs and rotor
-fuel filter
- fuel pressure regulator
-iac
- throttle position sensor
- cleaned throttle body
- replaced all vacuum lines
- battery
- fuel pump
- vaf ( i have 2 and it runs the same with both)
- air filter
- fuel relay
- relay in drivers side kick panel
- new coil
Any help is appreciated. Thank you