engine surge

[tim1999]

i have a 1987 g-20. when i start it the engine surges and then drops to almost a stall until it warms up. once it warms up it settles down into a normal idle. i've replaced the o2 sensor and the fuel pump. anybody have any ideas

[RNRea]

Engine Size? TBI or Carb? Any codes stored?

[lostreception]

resurrecting this thread as i have the same problem i have a 1990 g20 5.7 TBI
anyone know why this happens?

[RNRea]

This isn't really my expertise, but if the fuel and ignition systems are in proper working order the next thing to check might be the EGR system. You might check some of the other forums for similar issues in like-year'ed vehicles (e.g. Chevy Trucks, Suburbans, etc.). My van is now semi-retired, thanks to the high price of fuel.

[lostreception]

what are the other forums umention which are the better ones aside from here

[RNRea]

Avalanche/C&K/Silverado/Suburban/Tahoe might be a start... Seeing as many of these vehicles have similar, if not identical, drivetrains, the question might have come up over there, and already been answered...

[kkej4]

on your van were was the fuel pump at. i have a 85 g20 van and i think the fuel pump needs to be change but i can not find it. if you can tell me were yours is at maybe mine is close to it. thank you

[maxwedge]

This thread is one year old start a new one!!