Skip the auto shop - Our mechanics make house calls

Q: Truck has trouble starting, idle's too low, losing power, check engine light is on.

asked by on

I took my truck to the mechanic this morning who said that the spark plugs were wet so he did an engine compression test, which resulted in low 85 compression. He says the engine needs to be replaced. My question is, could anything else be causing these readings? What could cause my engine to fail this way? I drove the truck over an hour+ away on Tuesday and had a little trouble starting it 2 hours later, but it made the 1 hour drive home just fine. Are there any other options besides replacing the engine, that might fix the truck even temporarily?

My car has 107000 miles.
My car has a manual transmission.

A: You may want to try and run some combustion...

You may want to try and run some combustion cleaner into the intake. You can get the good cleaner from any Ford parts store. You use a small rubber hose and allow it to get sucked into the engine slowly and then let the engine sit for about 30 minutes then run a second can into the engine until it is gone and shut off engine and let sit 30 minutes. Start and rev the engine several times to loose any loose carbon and burn off any excess. This may increase the compression and help the valves seal better. It should help with the hard start also. If you need some assistance with this or the problem continues to persist, consider YourMechanic, as a certified technician can come diagnose your starting problem for an accurate repair.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Car takes 7-10 seconds to turn over and crank. VDC and Slip Lights are on.

Hi there. Typically, when a vehicle is hard to ignite, it's related to ignition timing. However, there is no need to spend $2,500 from the dealership on that type of repair. The best thing you can do is contact one...

Q: Truck shakes when accelerating from a stop.

Hey there. This may be a sign of a dirty or failing mass air flow sensor or potentially low fuel pressure. The mass air flow sensor monitors the air intake as it is mixed with fuel prior to being injected...

Q: car lost power when driving and had to tow it home.

Hi there. Your vehicle may need a tune up. Check the air filter, spark plugs and wires. If they are the original parts, I recommend replacing them with OEM parts. Also check the idle air control valve (IAC) and see...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...