Skip the auto shop - Our mechanics make house calls

Q: New SBC first start

asked by on

Newly built SBC first time starting. Comp cam, headers, intake/carb etc etc. Started up instantly fast an easy and I brought RPMs up to 2300ish for 20 minutes for break in like Comp papers said. All was well but 15 minutes in I noticed some smoke and it was getting hotter than normal. The smoke was just a minor oil leak on valve cover dripping on header. The heat was cause I was in a garage and needed more air flow. I got a big box fan on high in front of radiator now. When I went to restart it, it wont. Just cranks and spits a bit. Waited until it cooled a little and still just cranks and cranks with a pop or two. I know it has gas and spark. Timing shouldnt of moved and it was just running fine. I dont get it.

A: Pull one of the spark plugs to see if they ...

Pull one of the spark plugs to see if they are fuel fouled. The carburetor may have flooded the engine. If plugs are wet then try to hold the carburetor wide open to try and get it to crank over. You may be getting spark and too much fuel. Once it starts then it runs at normal speeds for the cam break in again. Have a certified technician from YourMechanic diagnose your vehicle's hard starting issue in order to have the correct repairs done.

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・Save up to 30%

Get a quote

What others are asking

Q: What does the low fuel Warning Light mean in a 2012 Chevrolet Cruze?

The low fuel Warning Light is located on the instrument cluster. When your vehicle is almost out of fuel, the low fuel Warning Light will illuminate. When you add more fuel to the car, the warning light will disappear. ...

Q: No spark on cyclinder 1 and 5

PCM's rarely fail excepting cases where there is a whole model year, or production run, where a known issue arose in the field (e.g., bad capacitors being one example in certain Toyotas but even that was a long time ago)....

Q: Car won't start or make any noise when the key turns over, but the battery has power because all my lights and radio is working.

Hi, thanks for writing in. This issue is most likely due to the starter. If the battery has full power, the starter is most likely receiving full power. If the starter is not working but it is receiving full power...

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...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control 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.