1990 Chevy 350, 5.7 l TBI. I would appreciate advice re using an OBD I scanner or an OBD II Scanner with cable adaptor? TY.
This model is pre OBD era, the earliest OBD equipped powertrain started in 1998 model year. OBD 2, started in 2002 required by Federal Regulations
This model is pre OBD era, the earliest OBD equipped powertrain started in 1998 model year. OBD 2, started in 2002 required by Federal Regulations
Federal Law required OBDII to become standard in cars in 1996. Medium-duty trucks had longer to comply.
Many cars had OBDII even earlier. My 1997 Jeep Cherokee has a full OBDII system.
OBD-II Background Information (http://www.obdii.com/background.html#Have)
Our 2003 LD has the OBDI system, having the standard OBDII plug under the dash, it can be scanned and display CEL codes but does not monitor the catalytic converter or individual cylinder's performance. Later model LDs.are OBDII compliant and monitor the cat's performance and much more.
I use a OBDII scanner to check our 2003's OBDI system, there isn't much information available compared to the mountains of information provided on newer vehicles.
Older Chevys use a different scanner, providing very limited information.
https://www.autozone.com/test-scan-and-specialty-tools/code-reader/innova-gm-obd1-code-reader/273348_0_0?cmpid=LIA:US:EN:AD:NL:1000000:GEN:71700000072591596&msclkid=23542faccc151bb18091705edcdef530&gclid=23542faccc151bb18091705edcdef530&gclsrc=3p.ds
Larry
OBD-II Background Information (http://www.obdii.com/background.html#Where)