OBS LS Swap
Thread Starter
Teching In
Joined: Mar 2023
Posts: 1
Likes: 0
OBS LS Swap I have a 93 chevy obs with a 5.3 swap. Truck ran fine until I changed the throttle body. New throttle body is the same size as the old one just a different brand. I swapped back to the old one once this issue started and the issue did not go away. Im currently having an issue where it idle surges on cold start and then dies with throttle. Fuel pressure holds and does not drop. It seems like its getting too much air and the TPS and IAC are not communicating but everything has been tested and checks out fine.
It has NO MAF or 02 sensors. It has been tuned speed density and open loop.
coils, plugs, and plug wires have been tested and check out normal
Throttle body is Motion Raceworks 102mm drive by wire
Fuel pump is inline high flow regulated to 58PSI with a return system. Stock fuel regulator on the rail has been capped.
New IAC , MAP & TPS. IAC connection has been tested and TPS connector has been replaced.
Stage 4 V2 cam
TBSS intake
It has NO MAF or 02 sensors. It has been tuned speed density and open loop.
coils, plugs, and plug wires have been tested and check out normal
Throttle body is Motion Raceworks 102mm drive by wire
Fuel pump is inline high flow regulated to 58PSI with a return system. Stock fuel regulator on the rail has been capped.
New IAC , MAP & TPS. IAC connection has been tested and TPS connector has been replaced.
Stage 4 V2 cam
TBSS intake
