Skip the auto shop - Our mechanics make house calls

Q: I accidentally put ethanol in my old truck, now has problems accelerating and losing power.

asked by on

I have since then ran two cans of sea foam ,one can of Berrymans, a fuel filter and a bottle of ethanol stabilizer. I have also been running premium gas. It idles fine, but once you accelerate in cuts out and falls on its face. I would appreciate any help

My car has 30000 miles.
My car has an automatic transmission.

A: Hello. The problem with ethanol in older ve...

Hello. The problem with ethanol in older vehicles, particularly those with metal gas tanks is it tends to "clean" things up.

"Clean" in this case means setting loose any dirt, corrosion, etc., that accumulates in the tank and fuel system over the years. Changing the fuel filter again, and probably a couple of times over a few weeks or a month or two may help catch all that debris before it gets to the injectors.

Borrow or rent a fuel pressure gauge/tester kit and connect it to the Schrader valve on the fuel rail. Pressure at idle should be 12-15 psi. Any lower and you will still have a restriction in the system. Have someone put it in Drive, and with their left foot on the brake pedal, give it some gas. If the fuel pressure drops, you may still have debris blocking the fuel filter. For help having the acceleration problem resolved, have a certified technician, like one from YourMechanic, inspect the system and perform any needed corrections.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: 1990 ford ranger front rotor removal

If your model has manual or automatic locking hubs, to remove the front rotors, the Mechanic has to follow the procedure for wheel bearing removal in the Factory Service Manual. If you desire to hire a certified Mechanic to perform...

Q: Car will not stay running when I take my foot off the gas pedal.

The fuel injection system does nothing until the engine is turning (starting or running), so pressing the pedal before you start will make no difference. The fuel injectors work at any RPM, so a choke is not necessary. The computer...

Q: Throttle delayed at high rpms

I'm curious if your Check Engine Light on. It sounds like there may be an issue with either the throttle position sensor offering false readings to the computer or there's an issue with the reaction of the throttle plate. There...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...