No codes, but running like crap - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

frack · 10-30-2022, 07:53 AM

First I thought that the car was misfiring. However, there are no CODES. I even found a plug wire that had a small cut, so I changed all the spark plugs and wires. Still the car feels like it is misfiring at all speeds and only really notice at very light throttle. I bought and installed new MAF, but still nothing. I even did a fuse pull to make sure I didnt get some bad gas. I took the throttle body off a cleaned it, was not bad as I do have a catch can and also cleaned the CAI filter. Last thing to check would be the battery. Its about 2 years old. Would a battery that is going bad cause this? Fuel pump? Filter? What am I missing?

ChibiBlackSheep · 10-30-2022, 08:34 AM

You need to have some kind of data logging software to go with while driving. If you don't have any codes, you need to start diagnosing while driving with a logger or else you are just replacing parts for no reason

frack · 10-30-2022, 12:59 PM

I have a efi live autocal device that I use to log data, but for some reason the computer will not detect the device.

ChibiBlackSheep · 10-30-2022, 06:35 PM

That's an issue in itself. Maybe some wiring problem, or something going on with the ECM?

Thunder70 · 10-30-2022, 07:37 PM

Has the car been sitting a long period possible old or bad gas

frack · 11-08-2022, 03:46 PM

Got codes today. P0172,P0175 and P0336,P0335. Any help would be appreciated. Sounds like a crankshaft position sensor going bad. Just a update from above. Battery checked out good. Stopped to get gas and would not start, but when it finally started the stabilitrac light came on and no tach, no rpm readings now.

frack · 11-10-2022, 02:20 PM

Changed out my O2 sensors and so far there is no hesitation or misfire. However, its cooler today as Hurricane Nicole is passing over. I went for a spirited drive, but it was raining so nothing crazy. I double checked the starter and the heat wrap is good, I inspected the wiring to the crank sensor and it looked good. Question. A misfire would make the car, specifically the longtube headers run hotter, right? I do have an extra ground running on the driver side head to the chassis. Still thinking that I should move it from there and go directly from the starter to the chassis. Possibly even bypassing the power distribution post essentially splicing the two power cables together. Anyone ?have an idea of what kind of connector I could use.

frack · 11-12-2022, 05:47 AM

Problem returned so I went ahead and changed the crank position sensor, checked the wiring around starter wrap and the wiring to the crank position sensor. Everything checked out. The car still has light throttle stumble or misfire. However I have not duplicated the codes from above post.

10-30-2022, 07:53 AM	#1
frack Drives: 2010 Inferno Orange SS Join Date: Sep 2014 Location: United States Posts: 120 View My Garage	No codes, but running like crap First I thought that the car was misfiring. However, there are no CODES. I even found a plug wire that had a small cut, so I changed all the spark plugs and wires. Still the car feels like it is misfiring at all speeds and only really notice at very light throttle. I bought and installed new MAF, but still nothing. I even did a fuse pull to make sure I didnt get some bad gas. I took the throttle body off a cleaned it, was not bad as I do have a catch can and also cleaned the CAI filter. Last thing to check would be the battery. Its about 2 years old. Would a battery that is going bad cause this? Fuel pump? Filter? What am I missing?
$frack is offline$

10-30-2022, 08:34 AM	#2
ChibiBlackSheep Drives: 2012 2SS/RS, 1968 SS Join Date: Feb 2012 Location: Southeast, PA Posts: 2,093	You need to have some kind of data logging software to go with while driving. If you don't have any codes, you need to start diagnosing while driving with a logger or else you are just replacing parts for no reason __________________ LS3 Crate Engine Swap \| CSP Custom Cam 232/240 .615/.615 113 +3 \| Stainless Power LT Headers \| Z28 Intake \| Borla S-Type Exhaust \| FTI Triple-Disc Billet 3200 Stall 2012 Camaro 2SS/RS \| 1968 Camaro SS \| 2020 Cadillac CT5 Premium Luxury \| 2021 Spark LS

10-30-2022, 12:59 PM	#3
frack Drives: 2010 Inferno Orange SS Join Date: Sep 2014 Location: United States Posts: 120 View My Garage	I have a efi live autocal device that I use to log data, but for some reason the computer will not detect the device.
$frack is offline$

10-30-2022, 06:35 PM	#4
ChibiBlackSheep Drives: 2012 2SS/RS, 1968 SS Join Date: Feb 2012 Location: Southeast, PA Posts: 2,093	That's an issue in itself. Maybe some wiring problem, or something going on with the ECM? __________________ LS3 Crate Engine Swap \| CSP Custom Cam 232/240 .615/.615 113 +3 \| Stainless Power LT Headers \| Z28 Intake \| Borla S-Type Exhaust \| FTI Triple-Disc Billet 3200 Stall 2012 Camaro 2SS/RS \| 1968 Camaro SS \| 2020 Cadillac CT5 Premium Luxury \| 2021 Spark LS

11-08-2022, 03:46 PM	#6
frack Drives: 2010 Inferno Orange SS Join Date: Sep 2014 Location: United States Posts: 120 View My Garage	Got codes today. P0172,P0175 and P0336,P0335. Any help would be appreciated. Sounds like a crankshaft position sensor going bad. Just a update from above. Battery checked out good. Stopped to get gas and would not start, but when it finally started the stabilitrac light came on and no tach, no rpm readings now. Last edited by frack; 11-08-2022 at 05:22 PM.
$frack is offline$

10-30-2022, 07:37 PM	#5
Thunder70 Drives: 2010 ss camaro Join Date: Dec 2017 Location: Mercerville N.J. Posts: 42	Has the car been sitting a long period possible old or bad gas

11-10-2022, 02:20 PM	#7
frack Drives: 2010 Inferno Orange SS Join Date: Sep 2014 Location: United States Posts: 120 View My Garage	Changed out my O2 sensors and so far there is no hesitation or misfire. However, its cooler today as Hurricane Nicole is passing over. I went for a spirited drive, but it was raining so nothing crazy. I double checked the starter and the heat wrap is good, I inspected the wiring to the crank sensor and it looked good. Question. A misfire would make the car, specifically the longtube headers run hotter, right? I do have an extra ground running on the driver side head to the chassis. Still thinking that I should move it from there and go directly from the starter to the chassis. Possibly even bypassing the power distribution post essentially splicing the two power cables together. Anyone ?have an idea of what kind of connector I could use.
$frack is offline$

11-12-2022, 05:47 AM	#8
frack Drives: 2010 Inferno Orange SS Join Date: Sep 2014 Location: United States Posts: 120 View My Garage	Problem returned so I went ahead and changed the crank position sensor, checked the wiring around starter wrap and the wiring to the crank position sensor. Everything checked out. The car still has light throttle stumble or misfire. However I have not duplicated the codes from above post. Last edited by frack; 11-13-2022 at 09:28 AM.
$frack is offline$