Question: Bosch 13077

[Marv02]

I swaped out my 1 wire stock O2 sender for the BOSCH P/N 13077 3 wire heated O2 sender mainly due to my full lenght headers.
To make a long story short at first the Bosch O2 sender worked fine but now with 300 miles on it it's starting to have a intermediate code 44.
Once in a while.
I read some where else that anouther C4 guy said stay awy from the Bosch brand O2 senders.
What you thinking about this.
I hate to go by anouther O2 sender again.
Is there a better made O2 than Bosch out there.
I also ned a part Number.

 

[vetteoz]

anouther C4 guy said stay awy from the Bosch brand O2 senders..
Is there a better made O2 than Bosch out there.

Don't believe everything you read on line.:eyerole
Look at some of the stuff you have had problems with in the last year that nobody else has

Bosch are the O2 sensor of choice for many aftermarket Wideband O2 units like the popular Innovate products

Have you rechecked your wiring for continuity / bad connections since YOU did the swap?
Have you data logged to see when fault happens?
Is the heating element getting power full time ?
Maybe the heater is not working so you are in the same situation as before with the O2 dropping out @ idle

 

[Marv02]

I need to also tell you this started after I washed the motor off with engine cleaner and a good hose down.
I was thinking it was a wet conection some where but after a full day letting thing dry off after a engine run and a 40 mile drive.
I reset the computer it still has a intermediate service engine soon lite.

 

[Hib Halverson]

I agree with the posts of others about the quality of Bosch sensors. In fact, Bosch sensors have ben OE on Corvette at times.

I'd test the sensor heater circuit's continuity then I'd check the heater operation. Connect a scan tester, select the data list, then set it for the O2s reading. Start the engine and wait for sensor readings to begin. They should start fairly quickly.

If the sensor checks out, I'd assume that the sensor is accurate and that the engine is running lean at times.

Also, sometimes I actually read sig lines. I noted the engine in the car makes 450 lbs/ft torque but only 365-hp. At what rpm is peak power occurring?

 

[Marv02]

TQ 450 is at 2500.

HP 365 is at 4500.

Today no service engine light.

I keep eye on it for now.

I agree with the posts of others about the quality of Bosch sensors. In fact, Bosch sensors have ben OE on Corvette at times.

I'd test the sensor heater circuit's continuity then I'd check the heater operation. Connect a scan tester, select the data list, then set it for the O2s reading. Start the engine and wait for sensor readings to begin. They should start fairly quickly.

If the sensor checks out, I'd assume that the sensor is accurate and that the engine is running lean at times.

Also, sometimes I actually read sig lines. I noted the engine in the car makes 450 lbs/ft torque but only 365-hp. At what rpm is peak power occurring?

 

[Hib Halverson]

TQ 450 is at 2500.

HP 365 is at 4500.

(snip)

Interesting...

I'd have thought with all those mods to increase airflow and port volume, the power peak would have moved up. Boy, that sure shows how restrictive the L98 type induction can be, even if it has runners which are bigger.

Are your power numbers standard-corrected or SAE-corrected and are they from an engine dyno or derived from chassis dyno numbers. If they're derived from chassis numbers, what was the correction factor?

 

[Marv02]

I using Dyno 2003 computer dyno to figue it out I know it not 100% but it should be closes.

The SPL full headers made a big diffrence in power.

I didn't want a high reving screamer I wanted a low to mid range grunt motor.

Interesting...

I'd have thought with all those mods to increase airflow and port volume, the power peak would have moved up. Boy, that sure shows how restrictive the L98 type induction can be, even if it has runners which are bigger.

Are your power numbers standard-corrected or SAE-corrected and are they from an engine dyno or derived from chassis dyno numbers. If they're derived from chassis numbers, what was the correction factor?