Mar 192019
 

I changed the head gasket and now there is only one click when i turn the ignition and one more when i release it, I can turn the motor manually and I’ve had both starter and battery tested, what could be the problem.


Most likely problem is the battery. Even though it tested good, it can still be bad. That being said, the first thing I would try would be a NEW fully charged battery. If you have then you can check a couple of fuses. The 250A Battery fuse and the 30A Starter Relay fuse. Then test the relay. And check connections at the starter and battery. Since you get a click I would think the PCM is sending a signal to the relay. You can check that as well if you determine the relay is not activating.

2012 Chevy Cruze Starter Wiring Diagram

2012-chevy-cruze-starter-wiring-diagram

Mar 112019
 

2002-chevy-imapala-trailing-arm

I have a bent rear wheel trailing arm. If it is temporarily removed, is the car temporarily driveable?


No.

Trailing Arm Replacement

  1. Raise and support vehicle.
  2. Remove bolt and nut from trailing arm (6) and knuckle (8), Fig. 1.
  3. Remove nut and bolt from trailing arm (6) and trailing arm bracket, Fig. 1.
  4. Remove trailing arm (6) from vehicle, Fig. 1.
  5. Reverse procedure to install, noting following:

a. Install bolt and nut to trailing arm and trailing arm bracket. Tighten bolt to 77 ft. lbs.

b. Install bolt and nut to trailing arm and knuckle. Tighten nut to 52 ft. lbs.  and turn an additional 65°.

Video shows a Monte Carlo but the procedure is the same.

Mar 102019
 

Chevy Impala

2 days ago a light on dash flashed Change Engine Oil. When light came on engine developed a severe misfire and lifters started chattering. What is the most likely cause(s),and how much is repair most likely to cost.


Difficult to say without looking at it. Check the engine oil level. If there is no oil detected you may add oil to see if the chattering decreases. Until the issue is narrowed down it would be premature to put a price tag on it.

Understanding an Engine Misfire

Engine Oil Light, Diagnosis & Testing

  1. Understand and validate customer concern. Inspect visible system components for obvious damage or conditions that may cause concern.
  2. Inspect for related bulletins, recall/field actions and preliminary information.
  3. Verify symptom is not exclusively a mechanical concern.
  4. Connect a suitably programmed scan tool, perform vehicle DTC Information function and verify at least one control module communicates with scan tool.
  5. Verify there are no control module Internal hardware performance DTCs set.
  6. Ignition ON, command MIL ON and OFF with scan tool. MIL should turn ON and OFF as commanded.
  7. Ignition ON, command MIL ON and OFF with a scan tool while observing following control circuit status parameters:
    • a. MIL control circuit low voltage test status.
    • b. MIL control circuit open test status.
    • c. MIL control circuit high voltage test status.
    • d. Each parameter should toggle between OK and Not Run or Not Run and OK.
  8. Ignition OFF, disconnect MIL electrical harness connectors. Ignition ON, MIL should not illuminate. If MIL is illuminated, test MIL control circuit terminal for a short to ground. If circuit tests normal, replace cluster.
  9. Ignition ON, connect a 3A fused jumper wire between MIL control circuit terminal and ground. MIL should illuminate. If MIL does not illuminate, test MIL control circuit for a short to voltage, or an open/high resistance. If circuit tests normal, replace MIL bulb.
  10. If all circuits/connections test normal, replace ECM.

1999 Chevrolet Prizm 1.8 engine will not rotate

 Auto Repair Questions, Chevy  Comments Off on 1999 Chevrolet Prizm 1.8 engine will not rotate
Feb 062019
 

 GEO Prizm

 

 

 

 

 

 

 

Only clicks when try to start. Rotate engine by hand and it goes a quarter turn and stops in either direction. Any idea what could cause that?


First Remove all spark plugs before trying to rotate the engine by hand. This engine has a timing chain. So if you have recently been working on it, the timing may be off and the piston is hitting the valves. Under normal circumstances this will not occur. If the engine was making a lot of rattling before it stopped running, it is possible that there is an issue with the timing chain guide(2 & 4) or timing chain itself has broken.

timing chain diagram 1999 Chevy Prizm

Dec 092018
 

2010 Chevy Suburban

Driver side seat will not heat. Is there a quick way to find out what the root of the problem is whether it be in the switch, a fuse/relay, or the heating element itself? I had a local mechanic tell me once I’d be better off finding a new seat in a junk yard than to try to buy parts to fix it. Thought I’d get a second opinion.

When you press the button on the door to activate the heater, the red light does come on but does not heat. The AC part of the seat cooler does work, but the heater part does not. Thanks for your help.



Generally there is a Body Code that will be stored. A Dealership or well equipped mechanic shop should have a scan tool that can pull the codes that will help guide you to the root of the problem without guessing.  No easier way than that.

Example Codes for heated seat malfunction:

Diagnostic Trouble Codes   B2345-4B  Seat Heater Elements Current Sensing Calibration Out of Range
Diagnostic Trouble Codes   B2425-04  Left Seat Heater Cushion Circuit Open
Diagnostic Trouble Codes   B2425-0A  Left Seat Heater Cushion Circuit Rate of Change Below Threshold
Diagnostic Trouble Codes   B2425-0B  Left Seat Heater Cushion Circuit Current Above Threshold
Diagnostic Trouble Codes   B2425-0C  Left Seat Heater Cushion Circuit Current Below Threshold
Diagnostic Trouble Codes   B2425-0D  Left Seat Heater Cushion Circuit Resistance Above Threshold
Diagnostic Trouble Codes   B2425-0E  Left Seat Heater Cushion Circuit Resistance Below Threshold
Diagnostic Trouble Codes   B2425-1F  Left Seat Heater Cushion Circuit Intermittent
Diagnostic Trouble Codes   B2430-04  Right Seat Heater Cushion Circuit Open
Diagnostic Trouble Codes   B2430-0A  Right Seat Heater Cushion Circuit Rate of Change Below Threshold
Diagnostic Trouble Codes   B2430-0B  Right Seat Heater Cushion Circuit Current Above Threshold
Diagnostic Trouble Codes   B2430-0C  Right Seat Heater Cushion Circuit Current Below Threshold
Diagnostic Trouble Codes   B2430-0D  Right Seat Heater Cushion Circuit Resistance Above Threshold
Diagnostic Trouble Codes   B2430-0E  Right Seat Heater Cushion Circuit Resistance Below Threshold
Diagnostic Trouble Codes   B2430-1F  Right Seat Heater Cushion Circuit Intermittent
Dec 092018
 

Chevy Suburban

 

I have a front left axle to replace. Do I really need to remove the coil over strut and sway bar end link to do this?


Not according to the manual.

CV AXLE SHAFT, Replace

1. Raise and support vehicle.
2. Remove wheel and tire assembly.
3. Remove drive axle center cap, if equipped.
4. Insert a drift or large screwdriver through brake caliper into one of the brake rotor vanes in order to prevent drive axle wheel drive shaft from turning.
5. Remove nut and washer from hub. Do not reuse nut. A new nut must be used when installing wheel drive shaft.
6. Using axle remover tool No. J 45859 or equivalent, press wheel drive shaft from hub.
7. Remove bolts securing wheel drive shaft inboard flange to output shaft flange.
8. Remove drift from rotor.
9. Remove stabilizer shaft link from lower control arm.
10. Wrap shop towels around both inner and outer wheel drive shaft boots in order to avoid damage to boots during removal.
11. Pull wheel drive shaft through lower control arm opening.
12. Reverse procedure to install, noting the following:
a. Torque inboard flange bolts to 58 ft. lbs.
b. Torque hub nut to 177 ft. lbs.
c. Torque wheel lug nuts to 140 ft. lbs.
d. Torque stabilizer shaft link nuts to 17 ft. lbs.

Starter just clicks once, 1992 Chevy C-1500 w/t pickup truck

 Auto Repair Questions, Chevy  Comments Off on Starter just clicks once, 1992 Chevy C-1500 w/t pickup truck
Dec 032018
 

Chevy truck

Starter just clicks once

Ok, I’ve had this starting problem for a long time. When I turn the key it just clicks once and nothing. I have changed the starter, the alternator. the ignition, because it would turn with out a key (which lead to it being stolen about 6 months ago, the ignition switch the dimmer switch(high beam, low beam switch) because it was not working any more, the turn signal switch, tried running a wire (purple wire) with the correct gauge straight from the battery to the solenoid and that worked, once. When I changed the starter, that worked once as well. I also got a new battery. What else could it be? Oh, I changed all the fuses too. I also replaced the battery cables. added 2 grounds as there was only 1 going to the frame, so I added 1 to the engine and 1 to the body.

This just started one day I was driving turned it off and then the click thing, what’s weird is a guy jumped me with good cables and it started, that’s when I figured the battery was bad and replaced it. Started once then back to click, replaced starter worked once, back to click. Had the old starter tested, it was fine. Also when I turned the key to on, the speedometer would jump to 50-90MPH before turning it to start. I even tried not hooking up the small wire going to the starter and jumped straight from the battery, click. Do I need a starter shim? It didn’t have one before. What is the other terminal for on the starter? One says S and the other B, I think.


One hard click is a starter(solenoid) or connection problem. Several clicks(click, click, click…) is a battery problem. If you are installing a remanufactured starter from like a1 cardone, toss it. Get a NEW starter.  the starter may test OK, but it obviously isn’t.  The “S” terminal is how the ignition switch activates the starter solenoid. It is working or you wouldn’t hear the click.  As this is a Chevy, one thing to look at would be the cables and cable connections at the starter to make sure they are not touching anything it shouldn’t or rubbed through at the block.

The most common reason for 1 click with all good connections, is the STARTER.

Oct 142018
 

2010 Chavy Impala

My automatic headlight won’t shut off.


This is common of a sticking relay. You will want to look for the DRL Relay. DRL = Daytime Running Lights.

DRL Relay Location

The DRL Relay is located in the underhood fuse block on the right side of the engine compartment. Look under the lid of the fuse block for exact location diagram.

Daytime Running Lamps (DRL)/Automatic Headlamp System

Daytime Running Lamps (DRL) can make it easier for others to see the front of your vehicle during the day. Fully functional daytime running lamps are required on all vehicles first sold in Canada.

The DRL system makes the low-beam headlamps come on at a reduced brightness when the following conditions are met:

  • The ignition is in the ON/RUN position.
  • The exterior lamps control is in AUTO.
  • The engine is running.

When the DRL are on, the regular headlamps, taillamps, sidemarker, and other lamps will not be on. The instrument panel and cluster will also not be lit.

The headlamps automatically change from DRL to the regular headlamps depending on the darkness of the surroundings. The other lamps that come on with the headlamps will also come on.

When it is bright enough outside, the headlamps will go off and the DRL will come on.

The regular headlamp system should be turned on when needed.

Do not cover the light sensor on top of the instrument panel because it operates the DRL.

Sep 082018
 

2001 Chevy Monte Carlo

Why is the turn signals blinking fast at the front of the car but the rear lights do not come on?


This is normal for when there is a bulb failure. You should also notice the turn signal indicator on the dash flashing fast as well. Replacing the bulb that does not illuminate should fix the issue.

Turn Signal Bulb Replacement

  • Open the hood.
  • Remove the radiator air baffle.
  • Apply light pressure to the headlamp lens to hold the headlamp in place while removing the retainers.
  • Lift up the headlamp retainers to release the headlamp from the upper fascia support.
  • Remove the headlamp from the slots in the upper fascia support.
  • Replace bulb

Turn Signal Lights

The TURN SIGNAL fuse in the LH I/P fuse block supplies ignition positive voltage to the hazard and turn signal lamp flasher assembly. The HAZ SW fuse in the RH I/P accessory wiring junction block also supplies battery positive voltage to the hazard and turn signal lamp flasher assembly. The turn signal lamps may activate only when the ignition switch is in the ON or ACCY position.

When the turn signal switch is placed in either the left or right position, current flows from the flasher module’s output to the turn signal switch assembly. The flasher module then sends an on-off voltage signal to either the left or the right turn signals and their instrument cluster (IPC) indicator. When you press the hazard switch, all the turn signal lamps and both of the IPC turn signal indicators will flash. The hazard and turn signal lamp flasher assembly is grounded at G201. The front turn signals are grounded at G101 and the rear turn signals are grounded at G302.