What can cause a hesitation? Honda techs cant find it

i would have the cat converter check for being clogged.

Roy

If I release the gas pedal, and get back on it. the loss of power goes away (when going uphill)

Also, when idling if i hit the gas hard, I hear a "pssst" noise right before the RPMs go up.

Roy, thanks a lot for the first response, can you please see the last addition that I made?

If you do not have any trouble codes, then you need to read the live data to understand if anything is not functioning correctly. A bad O2 sensor can cause such symptoms. They might not throw codes but the working voltage could be at the extremes of the range.

KHLow
I can record anything, can you advise on what I should record and what the values should be. (estimated values)
Thanks a lot,
Gerardo

Get the freeze frame data and post them here.

O2 sensor, TPS, etc.

I looked for freeze frame data, but. The result was: no frames logged

I ran a test and got this though:

ehicle Manufacturer: Honda Vehicle Calibration ID: 37805-RNA-A090 U

Test report: ------------------MID:$01 TID:$80 - O2 Bank 1 Sensor 1 Max: 40S Min: 0S Test result value: 25S PASS ----MID:$01 TID:$81 - O2 Bank 1 Sensor 1 Max: 70Ohm Min: 0Ohm Test result value: 39Ohm PASS ----MID:$01 TID:$83 - O2 Bank 1 Sensor 1 Max: 127.99609mA Min: -1.23047mA Test result value: 0.00391mA PASS ----MID:$01 TID:$84 - O2 Bank 1 Sensor 1 Max: -0.5mA Min: -2.17188mA Test result value: -1.36328mA PASS ----MID:$01 TID:$85 - O2 Bank 1 Sensor 1 Max: 65,535 Min: 37 Test result value: 2,689 PASS ----MID:$01 TID:$86 - O2 Bank 1 Sensor 1 Max: 127.99609mA Min: -2.25391mA Test result value: 0.04297mA PASS ----MID:$01 TID:$87 - O2 Bank 1 Sensor 1 Test incomplete or dependant test failed --MID:$02 TID:$98 - O2 Bank 1 Sensor 2 Max: 65.535V Min: 0.65V Test result value: 0.837V PASS ----MID:$02 TID:$99 - O2 Bank 1 Sensor 2 Max: 0.293V Min: 0V Test result value: 0.138V PASS ----MID:$02 TID:$9a - O2 Bank 1 Sensor 2 Max: 1.27V Min: 0V Test result value: 0.392V PASS ----MID:$02 TID:$9b - O2 Bank 1 Sensor 2 Max: 520ms Min: 0ms Test result value: 170ms PASS ----MID:$02 TID:$9c - O2 Bank 1 Sensor 2 Max: 65.535V Min: 0.05V Test result value: 0.392V PASS ----MID:$10 TID:$02 Lean to Rich sensor threshold voltage(constant) - O2 Bank 4 Sensor 4 Max: 53,248 Min: 6,248 Test result value: 65,520 FAIL ----MID:$1f TID:$ec -Max: 57,322 Min: 6,216 Test result value: 65,520 FAIL ----MID:$21 TID:$a0 - Catalyst Monitor Bank 1 Max: 722 Min: 0 Test result value: 72 PASS ----MID:$31 TID:$d0 - EGR Monitor Bank 1 Max: 0.04014inch Min: 0inch Test result value: 0.03263inch PASS ----MID:$31 TID:$d1 - EGR Monitor Bank 1 Max: 1.99882inch Min: 0.00589inch Test result value: 0.11569inch PASS ----MID:$31 TID:$d2 - EGR Monitor Bank 1 Max: 655.34998% Min: 347.67999% Test result value: 422.97998% PASS ----MID:$31 TID:$d3 - EGR Monitor Bank 1 Max: 25,199 Min: 0 Test result value: 3,613 PASS ----MID:$39 TID:$b2 -Max: -0.266kPa Min: -32.768kPa Test result value: -1.8kPa PASS ----MID:$3a TID:$b3 - EVAP Monitor (cap off) Max: -1.6kPa Min: -32.768kPa Test result value: -1.746kPa PASS ----MID:$3c TID:$b4 - EVAP Monitor (0.040") Test incomplete or dependant test failed --MID:$3c TID:$b5 - EVAP Monitor (0.040") Max: 25.6 Min: -327.67999 Test result value: -0.68 PASS ----MID:$3c TID:$b6 - EVAP Monitor (0.040") Test incomplete or dependant test failed --MID:$3c TID:$b7 -
EVAP Monitor (0.040") Test incomplete or dependant test failed --MID:$3c TID:$b8 - EVAP Monitor (0.040") Test incomplete or dependant test failed --MID:$3d TID:$b0 - EVAP Monitor (0.020") Max: 32.767kPa Min: -2kPa Test result value: 0kPa PASS ----MID:$3d TID:$b1 - EVAP Monitor (0.020") Max: -0.266kPa Min: -32.768kPa Test result value: -1.8kPa PASS ----MID:$3f TID:$dd -Max: 4,264 Min: 6,224 Test result value: 63,488 FAIL ----MID:$50 TID:$28 - O2 Heater Monitor Bank 4 - Sensor 4 Max: -204.72% Min: 106.39999% Test result value: -0.16% FAIL ----MID:$81 TID:$d8 - Fuel System Monitor Bank 1 Max: 1.24928 Min: 0.79172 Test result value: 0.95355 PASS ----MID:$a2 TID:$0c Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 1 Data Max: 65,535Count Min: 0Count Test result value: 0Count PASS ----MID:$a3 TID:$0c Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 2 Data Max: 65,535Count Min: 0Count Test result value: 0Count PASS ----MID:$a4 TID:$0c Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 3 Data Max: 65,535Count Min: 0Count Test result value: 0Count PASS ----MID:$a5 TID:$0c Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 4 Data Max: 65,535Count Min: 0Count Test result value: 0Count PASS ----MID:$a8 TID:$7d - Misfire Cylinder 7 Data Max: 43.21A Min: 74.72A Test result value: 655.22998A FAIL ----MID:$bf TID:$db -Max: 21,845 Min: 21,845 Test result value: 65,525 FAIL ----

End of r

Sorry for the huge file, but i had to do copy and paste on my phone.

Here is a better and more organized report: (thanks a lot for your help)

I looked for freeze frame data, but. The result was: no frames logged

I ran a test and got this though:

vehicle Manufacturer: Honda Vehicle Calibration ID: 37805-RNA-A090 U


Test report: ------------------MID:$01 TID:$80 - O2 Bank 1 Sensor 1 Max: 40S Min: 0S Test result value: 25S PASS

----MID:$01 TID:$81 - O2 Bank 1 Sensor 1 Max: 70Ohm Min: 0Ohm Test result value: 39Ohm PASS

----MID:$01 TID:$83 - O2 Bank 1 Sensor 1 Max: 127.99609mA Min: -1.23047mA Test result value: 0.00391mA PASS

----MID:$01 TID:$84 - O2 Bank 1 Sensor 1 Max: -0.5mA Min: -2.17188mA Test result value: -1.36328mA PASS

----MID:$01 TID:$85 - O2 Bank 1 Sensor 1 Max: 65,535 Min: 37 Test result value: 2,689 PASS

----MID:$01 TID:$86 - O2 Bank 1 Sensor 1 Max: 127.99609mA Min: -2.25391mA Test result value: 0.04297mA PASS

----MID:$01 TID:$87 - O2 Bank 1 Sensor 1 Test incomplete or dependant test failed

--MID:$02 TID:$98 - O2 Bank 1 Sensor 2 Max: 65.535V Min: 0.65V Test result value: 0.837V PASS

----MID:$02 TID:$99 - O2 Bank 1 Sensor 2 Max: 0.293V Min: 0V Test result value: 0.138V PASS

----MID:$02 TID:$9a - O2 Bank 1 Sensor 2 Max: 1.27V Min: 0V Test result value: 0.392V PASS

----MID:$02 TID:$9b - O2 Bank 1 Sensor 2 Max: 520ms Min: 0ms Test result value: 170ms PASS

----MID:$02 TID:$9c - O2 Bank 1 Sensor 2 Max: 65.535V Min: 0.05V Test result value: 0.392V PASS

----MID:$10 TID:$02 Lean to Rich sensor threshold voltage(constant) - O2 Bank 4 Sensor 4 Max: 53,248 Min: 6,248 Test result value: 65,520 FAIL

----MID:$1f TID:$ec -Max: 57,322 Min: 6,216 Test result value: 65,520 FAIL

----MID:$21 TID:$a0 - Catalyst Monitor Bank 1 Max: 722 Min: 0 Test result value: 72 PASS

----MID:$31 TID:$d0 - EGR Monitor Bank 1 Max: 0.04014inch Min: 0inch Test result value: 0.03263inch PASS

----MID:$31 TID:$d1 - EGR Monitor Bank 1 Max: 1.99882inch Min: 0.00589inch Test result value: 0.11569inch PASS

----MID:$31 TID:$d2 - EGR Monitor Bank 1 Max: 655.34998% Min: 347.67999% Test result value: 422.97998% PASS

----MID:$31 TID:$d3 - EGR Monitor Bank 1 Max: 25,199 Min: 0 Test result value: 3,613 PASS

----MID:$39 TID:$b2 -Max: -0.266kPa Min: -32.768kPa Test result value: -1.8kPa PASS

----MID:$3a TID:$b3 - EVAP Monitor (cap off) Max: -1.6kPa Min: -32.768kPa Test result value: -1.746kPa PASS

----MID:$3c TID:$b4 - EVAP Monitor (0.040") Test incomplete or dependant test failed

--MID:$3c TID:$b5 - EVAP Monitor (0.040") Max: 25.6 Min: -327.67999 Test result value: -0.68 PASS

----MID:$3c TID:$b6 - EVAP Monitor (0.040") Test incomplete or dependant test failed

--MID:$3c TID:$b7 -
EVAP Monitor (0.040") Test incomplete or dependant test failed --MID:$3c TID:$b8 - EVAP Monitor (0.040") Test incomplete or dependant test failed

--MID:$3d TID:$b0 - EVAP Monitor (0.020") Max: 32.767kPa Min: -2kPa Test result value: 0kPa PASS

----MID:$3d TID:$b1 - EVAP Monitor (0.020") Max: -0.266kPa Min: -32.768kPa Test result value: -1.8kPa PASS

----MID:$3f TID:$dd -Max: 4,264 Min: 6,224 Test result value: 63,488 FAIL

----MID:$50 TID:$28 - O2 Heater Monitor Bank 4 - Sensor 4 Max: -204.72% Min: 106.39999% Test result value: -0.16% FAIL

----MID:$81 TID:$d8 - Fuel System Monitor Bank 1 Max: 1.24928 Min: 0.79172 Test result value: 0.95355 PASS

----MID:$a2 TID:$0c Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 1 Data Max: 65,535Count Min: 0Count Test result value: 0Count PASS

----MID:$a3 TID:$0c Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 2 Data Max: 65,535Count Min: 0Count Test result value: 0Count PASS

----MID:$a4 TID:$0c Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 3 Data Max: 65,535Count Min: 0Count Test result value: 0Count PASS

----MID:$a5 TID:$0c Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 4 Data Max: 65,535Count Min: 0Count Test result value: 0Count PASS

----MID:$a8 TID:$7d - Misfire Cylinder 7 Data Max: 43.21A Min: 74.72A Test result value: 655.22998A FAIL

----MID:$bf TID:$db -Max: 21,845 Min: 21,845 Test result value: 65,525 FAIL

----

I am not sure if I understand all the information provided.

These are the code that failed.

----MID:$01 TID:$87 - O2 Bank 1 Sensor 1 Test incomplete or dependant test failed
----MID:$10 TID:$02 Lean to Rich sensor threshold voltage(constant) - O2 Bank 4 Sensor 4 Max: 53,248 Min: 6,248 Test result value: 65,520 FAIL

----MID:$1f TID:$ec -Max: 57,322 Min: 6,216 Test result value: 65,520 FAIL

----MID:$3c TID:$b4 - EVAP Monitor (0.040") Test incomplete or dependant test failed

----MID:$3c TID:$b6 - EVAP Monitor (0.040") Test incomplete or dependant test failed

--MID:$3c TID:$b7 -
EVAP Monitor (0.040") Test incomplete or dependant test failed --MID:$3c TID:$b8 - EVAP Monitor (0.040") Test incomplete or dependant test failed


----MID:$3f TID:$dd -Max: 4,264 Min: 6,224 Test result value: 63,488 FAIL

----MID:$50 TID:$28 - O2 Heater Monitor Bank 4 - Sensor 4 Max: -204.72% Min: 106.39999% Test result value: -0.16% FAIL

----MID:$a8 TID:$7d - Misfire Cylinder 7 Data Max: 43.21A Min: 74.72A Test result value: 655.22998A FAIL

----MID:$bf TID:$db -Max: 21,845 Min: 21,845 Test result value: 65,525 FAIL

----


After deleting those that I think are irrelevant as your scan tools might not be fully compatible with the vehicle and is picking up unrelevant data, there were mention of Bank 4 Sensor 4.

----MID:$01 TID:$87 - O2 Bank 1 Sensor 1 Test incomplete or dependant test failed

This is the only one that might mean something.

Generally the data does not show any iregularities so our attention should be going somewhere else.

Have you tested the fuel pressure?
Test the TPS performance.

How about that rich to lean sensor?
Also what is the tps? Throttle. Position sensor?

Yes, TPS = throttle position sensor.

There is no bank 4 sensor 4 so I don't think that is relevant.

I did check the TPS and nothing seems to be abnormal. It reads all the time from 0% to 90% (90 being full T)

Now today the car got a lot worse, It had no power going uphill, it almost stalled in a red light (on top of the hill).

I also noticed that if I hold the gas pedal down when the hesitation happens, the car has no power, and it is like its running super rich.

I ran it around the corner with out the air filter to look for lack of air flow in the intake, It still low power.

Do you think that the CAT is going bad, anyway to test it?

Thanks a lot for your help.

Disconnect the cat and go for a test, that is the only way.
Did you test the fuel pressure? How do you nknow the engine is running rich and not excessive lean?

Btw which engine do you have?

With the scan tool get the ignition timing and see what you have.

I am only getting around 20 miles per gallon highway.
Can you advise on what I should look for on the fuel pressure and the ignition timing?
By the way, hot outside temps, affect the car a lot. Today i had no power, like going into a highway was suicide, the car had no power at all, when i hit the gas.

Thanks a lot man, I really appreciate it.

The fuel pressure reading and ignition timing degrees. I need to know what they are to determine if there are any fault with them.

I got this today

This is for the monitoring of the various system and does not show any data that can help identify the problem.

I can record live data for the tps and ign timing, is that good enough?

Yes, that would help.

Also, my intake temp is running. Around 160 to 170 degrees f. Is that normal? I hear it should be 120 max

Our database does not have the range specifications but for testing, it is stated as more than 356 degrees than you have a problem so I don't think there is any fault here. IAT is with ambient temperature so it ranges accordingly.

here it is

this is what i logged

I have a lot more in my log but i can not load it here, Again thanks a lot for your help and time...

Can you also look at the egr err? It seems to show up when the car fails

Again, thank you very much for your time! :)

Seems like the EGR is the one causing the problem. When it occurs, the ignition timing is retarded drastically.

Try unplugging the EGR and test if the problem goes away.

I have encountered EGR problems that does not trigger any trouble codes and so far cleaning and replacement (with used parts) the system did not solve the problem and I am still waiting for the owner to send the vehicle back for more testings.

The engine seems to hesitate at the rpm range of 1,200 to 2,500 at slow or constant throttle opening.

I disconnected the egr, and ran the car for 1 hr.
Results:

The hesitation still present
The loss of power improved (not as bad)
The check engine light did not turn on at all
the egr err 99.2% is not active any more. No egr err percentage is being displayed

Do you think that the egr valve is not closing properly and this is why i atill have the hesitation? Keep in mind that the egr err 99.2% is gone now that the egr is unplugged.

Yes, it is possible. Try cleaning the EGR and its passages to see if it helps.

@GERAR Did you find the cause of the hesitation since my civic has the same problem? Thanks for your help.

If i may add my 2 BOB's worth here... looking at the data in earlier posts, i would be inclined to replace the EGR as it appears to be reacting slow to demand, the actuator may be sticky, personally i don't much go for cleaning as it's very hard to ensure all the carbon is gone and and if knobs of carbon remain and dislodge, you can be back to where you started with a possible EGR flow issue, i am not saying don't clean it as a test mode, but if that looks to do the job i would be replacing to make sure.

@MHPAUTOSl. Thanks for your advice. I found a crack on the distributor cap, will replace first.

ok, that's let us know if that fixes the problem, good luck.