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: My vehicle is mixing water and oil

Because you have a manual transmission, the mix of oil and coolant can be caused by a leaking intake manifold gasket, a blown head gasket or a cracked cylinder head. The intake manifold would need to be removed and inspected...

Q: What engines will fit into my 94 s10 blazer its a 4 door 2wd

If your VIN has a "W" or "Z" in it the 4.3L engine used in model year 1993 and 1994 will fit and function properly with your existing engine controls. You have to match the VIN to the engine, though,...

Q: Started my 2009 cobalt, smelled gas looked under car and gas was pouring out, replaced pump last October. Help!!

If your vehicle is leaking fuel, it can be from a few different places. First, one of the fuel hoses could be leaking. These hoses are made of rubber and can become brittle and crack over time. Second, the metal...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...