Why is my Chevelle 350 hard to start?

Fuel pump check valve doesn’t maintain pressure in the fuel rail so it boils and then you have to crank excessively to get rid of the vapor before it will start. Bought a 1972 Chevelle 350 a couple years ago. Every time I drove it it wouldn’t restart easily or sometimes not at all unless I waited a while.

Why does my Chevy truck run like poop?

Cat was gone when I bought it, so it’s not exhaust restriction. Truck runs like poop when cold, but got a little better when warm…..but here’s something weird he found while scanning—-when cold, the timing was all over the place. He finally decided it had bad gas……

Why is my Chevy 305 not running properly?

The stock headers further restricted air intake because of pollution concerns, though replacement Edlebrock or Vortec headers increase airflow while still maintaining proper emissions. Upgrade the air filter assembly with a modern unit to let the engine “breathe” more easily on the intake.

Where does the fuel leak on a 95 Vortec?

On 95 and later vortecs the fuel seeps into cylinders 2 and 4, not sure which on later vortecs. This fuel when off will leak past the piston rings and into the oil.

Why is my car engine hard to crank over when hot?

The starter (which is warm anyway from the engine heat) no gets even more heat from the exhaust (usually headers but sometime the “Y” pipe). The hotter the starter the higher the electrical resistance = starter won’t run as fast as it should.

Is the Chevy Vortec 4300 a reliable engine?

Chevy Vortec 4300 (4.3L V6) Engine Reliability Overall, the 4.3 vortec is a very strong and reliable motor, proven by it being the longest lasting production vortec engine. Generally, these engines are extremely capable of lasting up to 300,000 miles.

How to test for fuel spray during crank?

This is to be an ignition 1 (ING1) source which is power in both the key run and crank position. Correct the connection of this wire and verify voltage to the pink wire on the injector connector. Test again for fuel spray during crank. If the engine still cranks, is spraying fuel, but will not start go to step 2.

Are there any problems with the Chevy 4.3 Vortec engine?

The 4.3 Vortec engines made from 1996-2002 (L35 and LF6) have been reported to have engine knock problems. In a properly functioning engine, fuel burns in even pockets instead of all at once. The pockets burn in even timing, in sync with engine cycles. Engine knock occurs when the fuel burns unevenly and out of sync with the engine cycles.

What causes engine to crank for long time before it starts?

When an engine cranks for a long time before it starts, either spark or fuel is missing or weak and each has its own reasons. Most of the time, the air / fuel mixture has been disturbed and there is too much air or not enough fuel.

What makes a Chevy Silverado hard start when hot?

When hot it won’t start til it cranks long enough to get 30 lbs. of pressure or so. When cold it gets to that pressure right away and starts. I bypassed the oil pressure sending unit with a push button. When the button is pushed, the sending unit is bypassed.

What causes a car to have a hard start?

A weak coil or bad coil wire, a bad pick up coil or crank sensor or a bad rotor can all cause a change in the spark. If you know when it will not immediately start, try spraying carb cleaner or starting fluid in the duct that carries air to the air filter.

Why is my engine hard to start or extended cranking?

So if the engine is warm or cold, this sponge has to be saturated and begin to drip before the engine will start and extended cranking is one of the classic symptoms. By trying the fuel additive and thinking of this as a diagnostic procedure, if your problem gets better, continue to use the fuel additive. No change, stop using the additive.

What should I do if my long crank wont start?

Just a recap of what you should do first to determine if your long crank before starting is fuel related or not. First, before you try cranking the engine over, turn the ignition key to the run position then back off without cranking the starter.

Why does my 2.7L engine not start when hot?

I honestly have this exact same problem with my 2.7L. I can guarantee that something is becoming heat soaked when the engine sits for 5-25mins after being at operating temp.

What causes a Chevy pickup to hard start?

If after you have circled the key a few time the engine starts normally then you now know for sure you have a fuel pressure leak down problem causing your hard start. If this video was helpful please help support my youtube channel by subscribing here: https://www.youtube.com/channel/UChCX…

Why does my bike start cold or hot?

On cold starts, the engine usually fires right up, but after reaching operating temperatures or when on the hot side, I occasionally have a hard time getting the bike to start. The dealer has already replaced the starter, because it sounded like a thrashing machine.

Why does my Harley hard start when warm?

When the engine is warm it is tighter and requires more from the starter which in turn needs more amperage from the battery. If your hard start is slow cranking when warm I would have checked this first,then checked starter draw,then fuel and ignition.

What happens to the engine when the engine is cold?

When the engine is cold the air fuel mix enters the cylinder and is compressed and ready for ignition, cold fuel, cold air cold cylinder= lower compression. Take a empty soda bottle fill it with 1/4 cup of cold water, put the cap on and shake it up for about 3 seconds, now squeeze the bottle, it should squeeze in easily.

What causes a car to stall on a cold start?

It also manages the idle under changing engine loads, like when you kick on the air conditioning, turn on the headlights, or turn up the radio. When the idle air control valve malfunctions, you may experience a rough idle or the vehicle may stall entirely. This is especially true on cold starts.

What causes a Cadillac Seville engine to stall?

Fuel pressure which is low or was normal when the engine is started, but falls off as the stall develops, can be either an electrical or a fuel system problem. To eliminate the electrical aspects, repeat the stall with the Analyzer 5-25400 in step 20 (monitor) and observe the speed sensor, fuel pump, group I and 2, and ignition ON lights.

Why is my car engine hard to start?

The starter itself may not be cranking correctly due to the heat impacting the relays which drive the mechanisms (this was a common issue in old air cooled VWs, and with how some newer engines are crammed into engine bays similar things can happen).

How to troubleshoot a no start GM 4.3L pick up?

Testing a Cranks but Does Not Start condition on your GM 4.3L, 5.0L, 5.7L pick up, van or SUV is not that hard to do, if you have a solid diagnostic strategy. In this article I’ll show you the basics of testing such a problem.

What are the different types of Chevy starter?

Not only are there differences in the nose cones, but all is not equal when looking at the starter itself. Chevrolet developed two starters for use in different applications. One was a “standard-duty” starter, while the other was a “high-torque” starter.

Why is my Chevy starter not working properly?

If the starter emits a high-pitched whine as the engine is turning over, more clearance is required. Add shims. If the starter growls and the engine doesn’t turn over easily, the gap between the starter drive gear and the ring gear could be too tight. In this instance, shim the starter.

Why does my 350 Chevy truck not start?

350 chevy truck cranks but won’t start – Maintenance/Repairs – Car Talk Community Truck ran fine with no indication of problem. When outside temp. dropped in teens one morning it wouldn’t start.

What kind of transmission does Chevy Silverado 3500 have?

3500 HD models with the available Duramax 6.6 V8 have a ring gear size of up to 12 inches, which allows for more torque coming out of first gear. The Allison ® 10-speed automatic transmission is designed specifically for heavy-duty trucks to deliver more strength, improved efficiency and a smoother driving experience than before.

Why does my car stall when I try to start it?

If you don’t hear any noise coming from the fuel tank when you try to start your car, it is likely that you have a bad fuel pump. Since you can’t start your car, your only option will be to have it towed to an auto repair shop.

What’s the difference between a stalling engine and a not starting engine?

One of the main difference between and engine that will not start and one that stalls while in operation is the ability for the computer to detect the problem.

Why is my GMC Sierra 1500 stalling and dying?

There is no code given. Have changed the injectors, timing, fuel tank, fuel pump, fuel pump, map sensor, cooling temp sensor on front of block, rebuilt the tbi, air idea valve. None of this hasite helped. The truck starts and dies. Have to give a little gas to keep running. While driving have to 2 foot it so it won’t die.

What causes a misfire after a warm up?

Misfire After Warm Up: Misfire After Warm Up. Runs Great When Cold… Misfire after warm up. Runs great when cold. Has new engine new plugs wires injectors when starts misfiring can shut down start back up and runs fine until a few minutes then starts again. have the same problem? This sounds like you have an intake valve that is leaking.

Why is my Chevelle 350 hard to start?