1999 Chevy Camaro

Tiny
JOSHFRAN2
  • MEMBER
  • 1999 CHEVROLET CAMARO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 74,000 MILES
I have a 1999 Camaro with a 3.8L V6. My problem I that I have this ticking soud coming from on or in my engine. When I start my car, sometimes it ticks and sometimes not. When it is ticking, it accelerates poorly with little power. When I don't have any ticking sound the car runs excellent. Hot or cold, makes no difference. I have a P0449 code that comes on for the vent solenoid that I have replaced. And I have replaced the camshaft position sensor hoping that would help. It did not.

At time my car will overheat but the fans are working and the coolant is good. I don't know if this is related or not.
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Thursday, September 10th, 2009 AT 1:44 PM

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Tiny
IMPALASS
  • EXPERT
Hello -

To better assist you is your model just the Camaro, or the SS or the Z28. Also please tell me your engine size in liters and the 8th digit of your VIN.

If I understand you correctly you replaced solenoid did that clear the code? So now you have no codes?
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Thursday, September 10th, 2009 AT 5:19 PM
Tiny
JOSHFRAN2
  • MEMBER
The 8th digit of my VIN is K. It is a Camaro coupe with a 3.8L V6. When I replaced the solenoid, the engine light did not go off. I used a scan tool to turn off the light. The light came back on in less than 1 mile. It still gives me the P0449 code. I thought that it may be my crank sensor was malfunctioning to cause the intermitent ticking and give me the P0449 code, but since I don't have a code for the crank sensor, I thought maybe you wold have an idea. Thanks.
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Friday, September 11th, 2009 AT 12:31 PM
Tiny
HMAC300
  • EXPERT
Code P0449 is an evaporator cannister solonoid. It is suuposed to come on at about 30 mph. If it comes on at idle it will make it very hard to idle the car and run poorly. Check to see if the vacuum line is leaking or not connected properly. Tha may be your problem.
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Friday, September 11th, 2009 AT 9:18 PM
Tiny
IMPALASS
  • EXPERT
Hello -

Thanks for the info. Right now either my manual is off or we are off on the VIN. The 8th digit starting from the left going right is K? For a 3.8L I show either a C, F, G, or W. The K is for the 4.8L, 5.3, and 6.0. Please check again. For now let's press

I am not sure if your scan tool can just turn on the solenoid or not but you can do the other checks it appears.

Diagnostic Procedures
1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS INTRODUCTION article. After performing OBD system check, go to next step.
2. Turn ignition on, with engine off. Using scan tool, command solenoid on and off. If solenoid turns on and off as commanded, go to next step. If solenoid does not turn on or off when commanded, go to step 5.
3. Turn ignition off. Disconnect PCM harness connector C2. Turn ignition on. Using DVOM, set DVOM to 40-amp scale. Check current from solenoid control circuit in PCM harness connector to ground for 2 minutes. If current draw is less than 0.75 amp (but not zero), see DIAGNOSTIC AIDS. If current draw is not less than 0.75 amp, go to next step.
4. Turn ignition off. Disconnect solenoid connector. Using DVOM, check resistance from solenoid control circuit in PCM harness connector and ground. If resistance is infinite, go to step 14. If resistance is not infinite, go to step 15.
5. Turn ignition off. Remove underhood electrical center housing side shield. Release and pivot electrical center up to access Blue 12-pin connector. Disconnect connector. Turn ignition on, with engine off. Using a test light connected to battery voltage, probe test light to pin "F" of male terminal connector. Using scan tool, command EVAP vent solenoid on and off. If test light illuminates when vent solenoid is commanded on and off, go to next step. If test light does not illuminate when vent solenoid is commanded on and off, go to step 8.
6. Turn ignition off. Reconnect Blue 12-pin connector to underhood electrical center. Disconnect EVAP purge solenoid harness connector. Connect test light between solenoid harness connector terminals. Turn ignition on. Using scan tool, command EVAP purge solenoid on and off. If test light turns on and off when commanded, go to step 9. If test light does not turn on and off when commanded, go to next step.
7. Connect test light to ground. Probe test light to ignition feed circuit on solenoid harness connector. If test light illuminates, go to step 12. If test light does not illuminate, go to step 13.
8. Turn ignition on. Reconnect Blue 12-pin connector to underhood electrical center. Disconnect PCM harness connector C2. Turn ignition on, with engine off. Using a fused jumper wire connected to ground, momentarily probe solenoid control circuit in PCM harness connector. If solenoid clicks when circuit is grounded and opened, go to step 10. If solenoid does not click when circuit is grounded and opened, go to step 11.
9. Check connections at solenoid. Repair as necessary. After repairs, go to step 19. If connections are okay, go to step 14.
10. Check connections at PCM. Repair as necessary. After repairs, go to step 19. If connections are okay, go to step 18.
11. Repair faulty solenoid control circuit between PCM and Blue 12-pin connector. After repairs, go to step 19.
12. Repair faulty solenoid control circuit between solenoid and Blue 12-pin connector. After repairs, go to step 19.
13. Repair faulty solenoid ignition feed circuit. After repairs, go to step 19.
14. Replace EVAP vent solenoid. After replacing solenoid, go to step 19.
15. Turn ignition off. Remove underhood electrical center housing side shield. Lift underhood electrical center up to access Blue 12-pin connector. Disconnect connector. Check resistance between ground and solenoid control circuit connector male terminal pin "F". If resistance is infinite, go to next step. If resistance is not infinite, go to step 17.
16. Repair short to ground in EVAP solenoid control circuit between 12-pin connector and EVAP solenoid. After repairs, go to step 19.
17. Repair short to ground in EVAP solenoid control circuit between PCM and 12-pin connector. After repairs, go to step 19.
18. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
19. Using scan tool, select DTC, CLEAR INFO function. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter this DTC. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, repeat step 2.
20. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test.

Check to make sure your vent is not plugged.

Here is another check for Solenoids.

SOLENOIDS
All PCM-controlled solenoids should have at least 20 ohms of resistance when checked with positive ohmmeter lead connected to power supply terminal of solenoid and negative ohmmeter lead connected to ground terminal of solenoid. Some solenoids are equipped with internal diodes. On these solenoids, resistance values will differ if ohmmeter test leads are reversed.

Also please take a spray bottle of water and start the car. While running spray a mist all over the plug wires etc and see if the engine changes.

Also check the vacuum lines as suggested. Thanks for that info.
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Friday, September 11th, 2009 AT 10:03 PM

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