Hi all,
I am a new member to the list, and the new owner of 1989 s10 blazer (4.3l). The guy who I bought it from had done some extensive modifications, some I am even unfamiliar with. The
mods are:
- new 4.3 motor (rebuilt?) with 10 k on it, 150 k on truck
- eldebrockheaders, with flowmaster duall exhaust 2 1/4"
- elebrock aluminum intake
- new fuel pump, stock
- custom grind 268H CompCams Camshaft
- 670 cfm holly throttle body
- k&n filter
- custom made fastchip to work with add-ons
- and under-driven pullies (whaterver that is)
The problem:
Code 13 - Oxygen sensor circuit. The ECM throws this code after a bit of driving, often well after the 2 minute start up loop. Comes on the soonest once 50mph is exceeded, much slower if speeds are kept under that level. The SES light does automatically come on during startup, but the conditions seem to have to be met every time it is driven for it to appear. In short, when the vehicle is shut off it goes away (although it stays in the ECM memory, of course).
As a result, I think I am thrown into "open loop" mode when this code occurs (remember it comes on every time at highway speeds) so my mileage and power on the highway stinks. Very noticeable lack of power/gas guzzling.
The question:
According to Haynes, I should replace the 02 sensor. I did that, with absolutely no change. I didn't think it would, as the old sensor seemed to work for the period every time prior to the light coming on? At any rate, I don't suspect it is either the 02 sensor or it's harness, after two sensors.
This is where I get lost. Haynes also talks about the TPS possibly causing this code, if it is broken or something. Wouldn't that throw TPS codes as well then?
Could this code 13 also be caused by some kind of temperature related matter with the 02 sensor? What should I check for the TPS?
Could the custom programmed chip have anything to do with this?
I am at a frustrated loss. Anyway, if you are still reading after all of this rambling, and have any thoughts/ideas/suggestions it
would be really appreciated!
Thanks,
Scott
I am a new member to the list, and the new owner of 1989 s10 blazer (4.3l). The guy who I bought it from had done some extensive modifications, some I am even unfamiliar with. The
mods are:
- new 4.3 motor (rebuilt?) with 10 k on it, 150 k on truck
- eldebrockheaders, with flowmaster duall exhaust 2 1/4"
- elebrock aluminum intake
- new fuel pump, stock
- custom grind 268H CompCams Camshaft
- 670 cfm holly throttle body
- k&n filter
- custom made fastchip to work with add-ons
- and under-driven pullies (whaterver that is)
The problem:
Code 13 - Oxygen sensor circuit. The ECM throws this code after a bit of driving, often well after the 2 minute start up loop. Comes on the soonest once 50mph is exceeded, much slower if speeds are kept under that level. The SES light does automatically come on during startup, but the conditions seem to have to be met every time it is driven for it to appear. In short, when the vehicle is shut off it goes away (although it stays in the ECM memory, of course).
As a result, I think I am thrown into "open loop" mode when this code occurs (remember it comes on every time at highway speeds) so my mileage and power on the highway stinks. Very noticeable lack of power/gas guzzling.
The question:
According to Haynes, I should replace the 02 sensor. I did that, with absolutely no change. I didn't think it would, as the old sensor seemed to work for the period every time prior to the light coming on? At any rate, I don't suspect it is either the 02 sensor or it's harness, after two sensors.
This is where I get lost. Haynes also talks about the TPS possibly causing this code, if it is broken or something. Wouldn't that throw TPS codes as well then?
Could this code 13 also be caused by some kind of temperature related matter with the 02 sensor? What should I check for the TPS?
Could the custom programmed chip have anything to do with this?
I am at a frustrated loss. Anyway, if you are still reading after all of this rambling, and have any thoughts/ideas/suggestions it
would be really appreciated!
Thanks,
Scott