Skip the auto shop - Our mechanics make house calls

Q: Engine won't start while hot after replacing head gasket.

asked by on

2.8L TBI 4x4

Just replaced the head gasket.

While reassembling engine it started without most of the vacuum components attached to allow tightening of valves. Tightened rocker arms to the point they stopped tapping and then 1/2 turn. Car was idling OK at this time.

Valve covers placed on car.

4 Vacuum hoses go to the back of the carburetor.

1 labelled ACC 1 From the EGR Control Solenoid Valve 1 PCV Valve 1 Purge/TVS Valve

With all vacuum hoses in place the car dies after warming up.

If I UNPLUG the EGR Control Solenoid Valve vacuum the car runs at idle but bogs down real easily. Will start up any time though.

Once EGR Control Solenoid Valve vacuum the engine will not start until cold again.

Attempted to get Error code but shorting A-B Terminal.

Get code 12 and no additional codes.

Replaced EGR Valve/Control Valve solenoid

Sometimes if a different Vacuum line is unplugged the car may run when warm as well, not sure if just specific to the one vacuum line.

No brakes as well

My car has 126000 miles.
My car has an automatic transmission.

Hi there. The code 12 is for your distributor has no reference. When the engine gets hot, the secondary circuit on the ignition coil gets hot and will not work. I recommend replacing the ignition control module and then recheck. If the symptom continues, then you will need to change the ignition coil. As for the brakes not working, check the master cylinder for the fluid and make sure that its full. Look for any signs of brake fluid leaks. If the fluid is full, the pedal is firm, and there are no leaks, then the brakes may need to be replaced with new rotors and new drums. If you need further assistance with the distributor and the brakes on your vehicle, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: 2001 chevy cavalier doesn't turn on.Changed starter and ignition switch. Alternator is good and battery is good. Any ideas why it

Hello, thank you for writing in. There are several reasons why the vehicle may not start, and several ways to go about diagnosis. You can start by testing the power available at the starter solenoid to see if power is...

Q: Temp going up and down and jerking while driving.

The issue seems to be the head gasket is burned on your vehicle. The coolant is getting into the cylinders and the combustion gases are getting into the cooling system. This would explain why the engine would jerk when driving...

Q: Turn light indicators and speedometer malfunctioning

This is a common problem on the Chevy S10 Blazers of this era. There is a small power supply board behind the dash which regulates the transfer of power to these components. These are known for going bad. This can...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.